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| 1 | The bHLH Transcription Factor MYC3 Interacts with the Jasmonate ZIM-Domain Proteins to Mediate Jasmonate Response in Arabidopsis显示文摘Arabidopsis Jasmonate ZIM 域蛋白质(JAZ ) 充当复杂的 SCFCOI1 的底层镇压他们的下游地指向,它为调整 JA 的植物开发和防卫是必要的。bHLH 抄写因素 MYC2 被发现 JA 回答包括与 JAZ 交往并且调停 JA 禁止的根生长。这里,我们识别了直接由它的 N 终端区域的优点与 JAZ 交往了调整 JA 回答的另一 bHLH 抄写因素 MYC3。有 MYC3 的 overexpression 的转基因的植物在 JA 禁止的根延伸和幼苗开发展出了超敏性。交往 JAZ 模式和 MYC3 的导致 JA 的表示模式从 MYC2 的那些是可区分的。我们推测那 MYC3, MYC2 可以在 JA 回答的规定有冗余而且可区分的功能。 | Zhiwei Cheng Li Sun Tiancong Qi Bosen Zhang Wen Peng Yule Liu Daoxin Xie | 2011 | Molecular Plant2011，4，2： | 35 |
| 2 | Viral effector protein manipulates host hormone signaling to attract insect vectors显示文摘 | Dewei Wu Tiancong Qi Wan-Xiang Li Haixia Tian Hua Gao Jiaojiao Wang Jin Ge Ruifeng Yao Chunmei Ren Xian-Bing Wang Yule Liu Le Kang Shou-Wei Ding Daoxin Xie | 2017 | Cell Research2017，27，3： | 20 |
| 3 | Microstructure and Tribological Behavior of a TiO_2/hBN Composite Ceramic Coating Formed via Micro-arc Oxidation of Ti–6Al–4V Alloy显示文摘A composite coating containing hexagonal boron nitride(hBN) particles and titanium oxide(TiO_2) was formed on the surface of Ti–6Al–4V alloy via micro-arc oxidation(MAO). The effect of quantity of the hBN-particles added into electrolyte on microstructure, composition, and wear behavior of the resulting composite coatings was investigated. Microstructure, phase composition, and tribological behavior of the resulting MAO coatings were evaluated via scanning electron microscopy, X-ray diffraction, and ball-on-disc abrasive tests. The results reveal that the TiO_2/hBN composite coating consisting of rutile TiO_2, anatase TiO_2, and an hBN phase was less porous than particle-free coating. Furthermore, the presence of hBN particles in the MAO coating produced an improved anti-friction property. The composite coating produced in the electrolyte containing 2 g/L of hBN particles exhibited the best wear resistance.The outer loose layer of the MAO coatings was removed by a mechanical polishing process, which led to a significant improvement in the wear resistance and anti-friction properties of the MAO coatings and highlighted an essential lubricating role of hBN particles in the composite coatings. However, wear mechanism of the MAO coatings was not relevant to the presence of hBN particles, where fatigue wear dominated the anti-fraction properties of the MAO coatings with and without hBN particles. | Ni Ao Daoxin Liu Shuaixing Wang Qing Zhao Xiaohua Zhang Mengmeng Zhang | 2016 | Journal of Materials Science & Technology2016，32，10： | 19 |
| 4 | Rice functional genomics:decades'efforts and roads ahead显示文摘Rice(Oryza sativa L.)is one of the most important crops in the world.Since the completion of rice reference genome sequences,tremendous progress has been achieved in understanding the molecular mechanisms on various rice traits and dissecting the underlying regulatory networks.In this review,we summarize the research progress of rice biology over past decades,including omics,genome-wide association study,phytohormone action,nutrient use,biotic and abiotic responses,photoperiodic flowering,and reproductive development(fertility and sterility).For the roads ahead,cutting-edge technologies such as new genomics methods,high-throughput phenotyping platforms,precise genome-editing tools,environmental microbiome optimization,and synthetic methods will further extend our understanding of unsolved molecular biology questions in rice,and facilitate integrations of the knowledge for agricultural applications. | Rongzhi Chen Yiwen Deng Yanglin Ding Jingxin Guo Jie Qiu Bing Wang Changsheng Wang Yongyao Xie Zhihua Zhang Jiaxin Chen Letian Chen Chengcai Chu Guangcun He Zuhua He Xuehui Huang Yongzhong Xing Shuhua Yang Daoxin Xie Yaoguang Liu Jiayang Li | 2022 | Science China(Life Sciences)2022，65，1： | 12 |
| 5 | Determination of Forchlorfenuron Dissipation and Residue in Cucumbers and Red Soil显示文摘To assess the risks of forchlorfenuron after application, a residue analysis method for ferchlorfenuron in cucumbers and the red soil of Southern China was established, and the dissipation behavior and residue characteristics of forchlorfenuron were studied under field conditions. The field trials, including dissipation and residue experiments, were conducted in Hunan, Yunnan and Hainan Provinces. Forchlorfenuron was applied at 32 a.i.g ha-1 rate for the dissipation study and both 21 and 32 a.i.g ha-1 for the residue study. Representative cucumbers and soil samples were collected at predetermined intervals for HPLC for UV-detector analysis. The average recoveries of the method were 80.8%-92.0% with coefficients variation (CV) between 0.4% and 11.8%. The detection limit of forchlorfenuron in cucumbers and soil samples was 0.003 mg · kg-1 and the minimum detectable amount was 3.0×10-10 g. The half life of forchlorfenuron in cucumbers in the three provinces changed as: Yunnan (5.50 days), Hunan (5.88 days), and Hainan (6.53 days) and in the soil was observed: Hainan (6.54 days), Hunan (7.64 days), and Yunnan (8.39 days). The maximum terminal residue in cucumbers at 32 a.i.g ha-1 rate after 5 days was 0.009 mg · kg-1 (Yunnan) followed by 0.0085 mg · kg-1 (Hainan) and 0.0082 mg · kg-1 (Hunan) which was below MRL value of 0.01 mg · kg-1 established by the USA, EPA. So a waiting period of 5 days should be established after spaying on cucumbers to avoid hazard to human beings. | LIU Qiang GONG Daoxin PENG Xiaochun YAN Xiaojun | 2010 | Journal of Northeast Agricultural University(English Edition)2010，17，1： | 11 |
| 6 | High-performance silicon−graphene hybrid plasmonic waveguide photodetectors beyond 1.55μm显示文摘Graphene has attracted much attention for the realization of high-speed photodetection for silicon photonics over a wide wavelength range.However,the reported fast graphene photodetectors mainly operate in the 1.55μm wavelength band.In this work,we propose and realize high-performance waveguide photodetectors based on bolometric/photoconductive effects by introducing an ultrathin wide silicon−graphene hybrid plasmonic waveguide,which enables efficient light absorption in graphene at 1.55μm and beyond.When operating at 2μm,the present photodetector has a responsivity of ~70 mA/W and a setup-limited 3 dB bandwidth of >20 GHz.When operating at 1.55μm,the present photodetector also works very well with a broad 3 dB bandwidth of >40 GHz(setup-limited)and a high responsivity of ~0.4 A/W even with a low bias voltage of−0.3 V.This work paves the way for achieving highresponsivity and high-speed silicon-graphene waveguide photodetection in the near/mid-infrared ranges,which has applications in optical communications,nonlinear photonics,and on-chip sensing. | Jingshu Guo Jiang Li Chaoyue Liu Yanlong Yin Wenhui Wang Zhenhua Ni Zhilei Fu Hui Yu Yang Xu Yaocheng Shi Yungui Ma Shiming Gao Limin Tong Daoxin Dai | 2020 | Light(Science & Applications)2020，9，1： | 10 |
| 7 | Surface modification of Ti-6Al-4V alloy by cathode assiting discharge setup and conventional plasma nitriding methods显示文摘In order to improve the wear resistance of titanium alloys,the potential of the plasma nitriding process with a cathode assiting discharge setup was examined.Ti6Al4V alloy was nitrided by the cathode assiting discharge nitriding(CAN) and conventional DC plasma nitriding(CPN) methods,respectively.The micro-topography,phase composition and cross-sectional microhardness distribution of two nitriding layers were studied comparatively.The sliding wear resistance of the nitriding layers was examined by a ball-on-disk test against Si3N4 balls.The results indicated that the surface roughness Ra of the CAN layer was about 1 order less than that of the CPN layer.In addition,the CAN surfaces possessed significantly greater wear resistance than the CPN layer at higher loads,and increased the wear resistance of Ti6Al4V alloy by about 2 orders due to the higher loading bearing ability,higher rate of TiN phase,greater surface microhardness and bigger microhardness improving depth.This is because the double glow discharge effect in CAN strengthened the density of the active nitrogen atoms and the nitriding efficiency.Moreover,the ion bombardment effect on the surface of the nitriding titanium alloy was reduced obviously. | TANG JinGang LIU DaoXin TANG ChangBin ZHANG XiaoHua | 2013 | Science China(Technological Sciences)2013，56，8： | 8 |
| 8 | Finite Element Method Analysis of the Stress for Line Pipe with Corrode Groove During Outdoor Storage显示文摘The basic principle of corrode groove on outside of steel pipe during storage was analyzed in this paper, namely the water film on the contacted surface of steel pipe, which gathered from humidity in the air, rain or gel, and the suspended particles in air, and the corrosive composition, such as SO2, CO2, O2 and NaCl, in addition to the inhomogeneity of the organization and composition, which lead to the corrosion cell reaction, so that cause the corrosion initial from the contact surface of the between steel pipes, so as to form the corrosion groove. At the same time, the corrosion groove with depth of 0.125t (t pipe wall thickness) on the pipe of Φ1016 mm × 21 mm X70 API SPEC 5L was simulated using the FEM (finite element method), and the stress and strain distribution of the defect area near corrosion groove were solved at the inner pressure of 12 MPa, 10 MPa, 8 MPa, 6 MPa, 4 MPa and 2 MPa, respectively, which showed that no matter the pressure values were, the maximum stress and strain were lied at the bottom of corrosion defects groove and were in good linear relationship with the internal pressure increasing from 2 MPa to 6 MPa. When the internal pres- sures were greater than 6 MPa, they felled into the nonlinear model and to be yielded or even to be destroyed. In addition, the residual strength and the limit operation pressure of the corrode pipe with the defects groove of 0.125t were calculated or simulated according to the theoretical calculation, the finite element method based on the stress, the finite element method based on strain, DNV-RP-F101, ASME B31G and experimental methods respectively. The results showed that the residual strength and the limit operation pressure of the defective parts solved by the finite element method based on stress were 424 MPa, and 15.34 MPa, respectively, which was very close to that of experimental method, the residual strength was 410 MPa and the limit operation pressure 14.78 MPa. Besides, the results also showed that it was feasible and effective to simulate the residual strength of the structure with corrosion defects using the finite element method. | Zhuanzhao YANG Daoxin LIU Xiaohua ZHANG | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，2： | 7 |
| 9 | Improving fatigue performance of Ti-6Al-4V alloy via ultrasonic surface rolling process显示文摘The effect of a gradient nanostructured(GNS) surface layer obtained by ultrasonic surface rolling process(USRP) on the fatigue behavior of Ti-6Al-4V alloy has been studied in this paper. Microstructure, surface topography, surface roughness and residual stress measurements were performed to characterize the surface under different conditions. Rotating bending fatigue tests were carried out to evaluate the fatigue behavior of different treatments. The results present a remarkable fatigue performance enhancement for the Ti-6Al-4V alloy with a GNS surface layer obtained by application of USRP with respect to the untreated condition, notwithstanding its considerable surface roughness due to severe ultrasonic impacts and extrusions. Mechanical surface polishing treatment further enhances the beneficial effects of USRP on the fatigue performance. The significantly improved fatigue performance can mainly be ascribed to the compressive residual stress. Simultaneously, the GNS surface layer and surface work hardening have a synergistic effect that accompanies the effect of compressive residual stress. | Chengsong Liu Daoxin Liu Xiaohua Zhang Dan Liu Amin Ma Ni Ao Xingchen Xu | 2019 | Journal of Materials Science & Technology2019，35，8： | 7 |
| 10 | Influence of surface coating on Ti811 alloy resistance to fretting fatigue at elevated temperature显示文摘An extensive study of the composition distribution, bonding strength, hardness, and wear resistance of a 0Cr18Ni9 film deposited on a Ti811 titanium alloy surface by ion beam enhanced deposition (IBED) is presented. Shot peening was introduced to post-treat the modified surface to synergistically improve the fretting fatigue resistance of the Ti811 alloy at 350°C. The results indicate that the 0Cr18Ni9 film with high density, small grain size, low void radio, and high bonding strength can be prepared using IBED. As a result, the hardness, wear resistance, and fretting fatigue resistance of the Ti811 alloy are increased to a remarkable extent. Compared with shot peening treatment or IBED 0Cr18Ni9 film alone, the Ti811 titanium alloy with an IBED 0Cr18Ni9 film combined with shot peening shows a higher fretting fatigue resistance at 350°C. This is due to the synergistic effect of the high wear resistance of the film surface and the residual compressive stress induced by shot peening. | ZHANG Xiaohua LIU Daoxin | 2009 | Rare Metals2009，28，3： | 6 |
| 11 | Synthesis,insecticidal and acaricidal activities of novel 2-arylpyrroles显示文摘To search for novel 2-arylpyrroles with unique biological activities,a series of novel 2-arylpyrrole derivatives were designed and synthesized,and their structures were characterized by 1 H and 13 C NMR spectroscopy,MS spectrometry,and elemental analysis.Their insecticidal activities against Lepidopteran pests (e.g.Mythimna separata) and acaricidal activities against mites (e.g.Tetranychus urticae) were evaluated.The results of bioassays indicate that some of these title compounds exhibited excellent insecticidal and acaricidal activities.For example,4-bromo-1-((chloromethoxy)methyl)-2-(4-chloro phenyl)-5-(trifluoromethyl)pyrrole-3-carbonitrile (6a),4-bromo-2-(4-chlorophenyl)-1-((2-fluoroethoxy)-methyl)-5-(trifluoromethyl)pyrrole-3-carbonitrile (6d) showed insecticidal activity against Mythimna separata and 4-bromo-2-(4-chlorophenyl)1-((isopropoxymethoxy)methyl)-5-(trifluoro methyl)pyrrole-3-carbonitrile (7d) showed acaricidal activity against Tetranychus urticae.They were more effective than Chlorfenapyr,which has been the only commercialized member of a new class of chemicals of 2-arylpyrroles. | LIU AiPing TANG Ming YU ShuYing LIU XingPing WANG XiaoGuang PEI Hui WU DaoXin HU Li OU XiaoMing HUANG MingZhi | 2013 | Science China Chemistry2013，56，1： | 5 |
| 12 | Contribution of ultrasonic surface rolling process to the fatigue properties of TB8 alloy with body-centered cubic structure显示文摘The effect of ultrasonic surface rolling process(USRP) as a severe plastic deformation technology was investigated on the evolution of microstructure, residual stress and surface morphology of TB8 alloys with body-centered cubic structure. Stress-controlled rotating-bending fatigue tests indicated increased fatigue strength in USRP samples prepared using different number of passes compared to the base material, which was attributed to the presence of gradient structure surface layers. Five subsequent USRP passes resulted in the highest fatigue strength, due to the optimal surface properties including higher extent of grain refinement, larger compressive residual stresses, 'smoother' surface morphology and increased micro-hardness. However, the effect of USRP technology on improving fatigue strength of TB8 alloy was not significant in comparison with that of other titanium alloys(for example, Ti6 Al4 V), which was attributed to the notable surface residual stresses relaxation revealed from measurements on postfatigued USRP samples. Electron backscatter diffraction analysis confirmed that fatigue crack initiation occurred in the larger grains on the surface with high Schmid factor. Small cracks were found to propagate into the core material in a mixed transgranular and intergranular mode. Further analysis indicated that grain growth existed in post-fatigued USRP-treated TB8 samples and that the average geometrically necessary dislocations value reduced after fatigue loading. | Dan Liu Daoxin Liu Mario Guagliano Xingchen Xu Kaifa Fan Sara Bagherifard | 2021 | Journal of Materials Science & Technology2021，，2： | 5 |
| 13 | Effect of Shot Peening and Plasma Electrolytic Oxidation on the Intergranular Corrosion Behavior of 7A85 Aluminum Alloy显示文摘The effects of shot peening(SP) and plasma electrolytic oxidation(PEO) on the intergranular corrosion behavior of the novel high strength aluminum alloy 7A85(AA 7A85) were investigated by electrochemical polarization and electrochemical impedance tests.The intergranular corrosion mechanism of SP,PEO and PEO combined with sealingtreated AA 7A85 was studied by the metallographic analysis,residual stress testing,X-ray diffractometer analysis and scanning electron microscopy.The results show that AA 7A85-T7452 is very sensitive to intergranular corrosion.SP would significantly improve its intergranular corrosion resistance.This is attributed to the combination action of residual compressive stress and grain refinement.PEO would reduce the largest corrosion depth by 41.6%.Moreover,PEO without sealing did not eliminate the intergranular corrosion due to the existence of the micropores and microcracks in the oxide coating.However,PEO combined with the SiO2sol–gel sealing treatment could effectively protect the AA 7A85-T7452 from intergranular corrosion because of the good corrosion resistance and barrier function of the sealed coating. | Zuoyan Ye Daoxin Liu Chongyang Li Xiaoming Zhang Zhi Yang Mingxia Lei | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，4： | 4 |
| 14 | Effects of pretreatment and HVOF sprayed cermet coating on fatigue properties of TC21 titanium alloy显示文摘The effects of grit blasting (GB),shot peening (SP) pretreatment and high velocity oxygen fuel(HVOF) sprayed WC-17Co cermet coating on the fatigue properties of the novel ultra-high strength TC21 titanium alloy were investigated with a rotating bending fatigue test machine.The basic properties and surface integrity of the coating were investigated by using X-ray diffraction (XRD),surface roughness meter,microscopic hardness tester,scanning electron microscopy (SEM) and X-ray stress test instruments.The results showed that the residual compressive stress could be introduced into the surface of TC21 alloy by GB and SP pretreatment,and that HVOF sprayed WC-17Co coating was compactly bonded with TC21 alloy substrate and it significantly improved the surface hardness of the substrate.However,there was a certain residual tensile stress in the sublayer of the coating.SP could significantly increase fatigue resistance of TC21 alloy due to the surface residual compressive stress.There was no significant effect on fatigue resistance by GB treatment due to the offset between the influence of surface residual compressive stress and the surface notch effect.The fatigue resistance of TC21 alloy was significantly reduced by HVOF WC-17Co coating prepared with GB pretreatment.This could be attributed to the relaxation of surface residual compressive stress during the HVOF heating process,pore defects and residual tensile stress distribution in the WC-17Co coating with low toughness,and the surface notch induced by GB.The fatigue resistance of TC21 alloy was slightly reduced by HVOF WC-17Co coating prepared with SP pretreatment.This was attributed to the offset between the advantage effect by SP and disadvantageous effect of WC-17Co coating and high temperature factor during the HVOF process. | DU DongXing LIU DaoXin MENG BaoLi ZHANG XiaoHua | 2013 | Science China(Technological Sciences)2013，56，4： | 4 |
| 15 | First demonstration of an on-chip quadplexer for passive optical network systems显示文摘An on-chip quadplexer is proposed and demonstrated with four wavelength-channels of 1270, 1310, 1490, and 1577 nm. The present quadplexer consists of four cascaded filters based on multimode waveguide grating(MWG), which are composed of a two-mode(de)multiplexer and an MWG. For the fabricated quadplexer on silicon, all four wavelength channels have flat-top responses with low excess losses of <0.5 dB as well as the desired bandwidths, which are about 16, 38, 19, and 6 nm, respectively. The cross-talk for both upstream channels and downstream channels is less than -24 dB. Moreover, the data transmission of 10 Gb∕s of the present silicon quadplexer is also successfully demonstrated. | DAJIAN LIU LONG ZHANG HEXIN JIANG DAOXIN DAI | 2021 | Photonics Research2021，9，5： | 4 |
| 16 | Silicon/2D-material photodetectors: from nearinfrared to mid-infrared显示文摘Two-dimensional materials(2DMs)have been used widely in constructing photodetectors(PDs)because of their advantages in flexible integration and ultrabroad operation wavelength range.Specifically,2DM PDs on silicon have attracted much attention because silicon microelectronics and silicon photonics have been developed successfully for many applications.2DM PDs meet the imperious demand of silicon photonics on low-cost,high-performance,and broadband photodetection.In this work,a review is given for the recent progresses of Si/2DM PDs working in the wavelength band from near-infrared to mid-infrared,which are attractive for many applications.The operation mechanisms and the device configurations are summarized in the first part.The waveguide-integrated PDs and the surface-illuminated PDs are then reviewed in details,respectively.The discussion and outlook for 2DM PDs on silicon are finally given. | Chaoyue Liu Jingshu Guo Laiwen Yu Jiang Li Ming Zhang Huan Li Yaocheng Shi Daoxin Dai | 2021 | Light(Science & Applications)2021，10，7： | 3 |
| 17 | Influence of Shot Peening Treatment on the Fatigue and Corrosion Resisting Properties of 2Cr13 Stainless Steel显示文摘In the present paper,shot peening treatments were used to strengthen the steel surface,and the influence on the fatigue and corrosion resisting properties of 2Cr13 stainless steel was examined.The residual stress and the surface roughness were investigated by XRD and AFM.The characteristics of fatigue and corrosion resistance have also been analyzed by bending fatigue and salt spray tests.The result reveals that the fatigue limit of the samples is improved dramatically with the increasing of the peening strength by 7.5%.Meanwhile,the peenging angle has no evident influence on the fatigue properties.Compared with the untreated samples,the acid corrosion weight loss of the samples after the shot peening treatment is decreased almost by 90%.From the above experimental results proper shot peening would improve not only the fatigue property but also the corrosion resistance of 2Cr13-typed stainless steel. | Liu Mingxia Zhang Haicun Liu Daoxin Han Zengfu Zhi Jinhua Guo Wenyong Zhou Yafeng | 2012 | 稀有金属材料与工程2012，41，S1： | 2 |
| 18 | Four-channel CWDM device on a thin-film lithium niobate platform using an angled multimode interferometer structure显示文摘A compact and high-performance coarse wavelength-division multiplexing(CWDM) device is introduced with a footprint of 2.1 mm × 0.02 mm using an angled multimode interferometer structure based on a thin-film lithium niobate(TFLN) platform.The demonstrated device built on a 400 nm thick x-cut TFLN shows ultra-low insertion losses of <0.72 dB.Measured 3 dB bandwidths are 12.1 nm for all channels,and cross talks from adjacent channels are better than 18 dB.Its peak wavelength positions comply with the CWDM standard with a channel spacing of 20 nm.The filter bandwidth of the proposed CWDM device can be tuned by adjusting the structural parameters.This demonstrated CWDM device will promote future realization of multi-channel and multi-wavelength transmitter chips on TFLN. | GENGXIN CHEN ZILIANG RUAN ZONG WANG PUCHENG HUANG CHANGJIAN GUO DAOXIN DAI KAIXUAN CHEN LIU LIU | 2022 | Photonics Research2022，10，1： | 2 |
| 19 | Toward calibration-free Mach-Zehnder switches for next-generation silicon photonics显示文摘Silicon photonic Mach–Zehnder switches(MZSs)have been extensively investigated as a promising candidate for optical systems.However,conventional 2×2 MZSs are usually prone to the size variations of the arm waveguides due to imperfect fabrication,resulting in considerable random phase imbalance between the two arms,thereby imposing significant challenges for further developing next-generation N×N MZSs.Here we propose a novel design toward calibration-free 2×2 and N×N MZSs,employing optimally widened arm waveguides,enabled by novel compact tapered Euler S-bends with incorporated mode filters.With standard 180 nm CMOS foundry processes,more than thirty 2×2 MZSs and one 4×4 Benes MZS with the new design are fabricated and characterized.Compared with their conventional counterparts with 0.45-μm-wide arm waveguides,the present 2×2 MZSs exhibit significant reduction in the random phase imbalance.The measured extinction ratios of the present 2×2 and 4×4 MZSs operating in the all-cross state are 27-49 dB and∼20dB across the wavelength range of∼60nm,respectively,even without any calibrations.This work paves the way toward calibration-free large-scale N×N MZSs for next-generation silicon photonics. | Lijia Song Tangnan Chen Weixi Liu Hongxuan Liu Yingying Peng Zejie Yu Huan Li Yaocheng Shi Daoxin Dai | 2022 | Photonics Research2022，10，3： | 2 |
| 20 | Effects of temperature,slip amplitude,contact pressure on fretting fatigue behavior of Ti811 alloys at elevated temperatures显示文摘Effects of the temperature,slip amplitude,and contact pressure on fretting fatigue(FF) behavior of the Ti811 titanium alloy were investigated using a high frequency fatigue machine and a home-made high temperature apparatus.The fretting fatigue failure mechanism was studied by observing the fretting surface morphology features.The results show that the sensitivity to fretting fatigue is high at both 350 and 500 °C.The higher the temperature,the more sensitive to the fretting fatigue failure is.Creep is an important factor that influences the fretting fatigue failure process at elevated temperatures.The fretting fatigue life of the Ti811 alloy does not change in a monotonic way as the slip amplitude and contact pressure increase.This is owing to the fact that the slip amplitude affects the action of fatigue and wear in the fretting process,and the nominal contact pressure affects the distribution and concentration of the stress and the amplitude of fretting slip at the contact surface,and thus further influences the crack initiation probability and the driving force for propagation. | Xiaohua ZHANG Daoxin LIU | 2009 | Acta Metallurgica Sinica(English Letters)2009，22，2： | 2 |
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