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Effect of Frequency on Fatigue Lifetime of Extruded Mg-3%Al-1%Zn Alloy朱荣Department of Materials Science and Engineering,Nanjing University of Science and Technology摘 要:fatigue lifetime may be due to the dependence of twinning upon loading frequency and strain amplitude.关键词:......
Low-cycle fatigue lifetime estimation of Ti–6Al–4V welded joints by a continuum damage mechanics modelHong-Yu Qi,Xiao-Lei Zheng,Xiao-Guang YangSchool of Energy and Power Engineering,Beihang University摘 要:The low-cycle fatigue(LCF)behavior of directionally solidified nickel-based superalloy Ti–6Al–4V was studied under bare and electron beam welding......
between statistical fatigue lifetime and thickness of IMC layer of solder joints 当IMC层非常薄且Cu6Sn5与钎料界面较光滑时,钎料不能稳固连接,极易从铜上剥离.当IMC层呈波纹状,且厚度增加到1.5~3.0 μm时,裂纹在钎料基体中萌生,并沿着某一角度扩展或沿着Cu6Sn5与钎料界面扩展.当裂纹沿Cu6Sn5与钎料界面扩展时... the morphologies and thickness of IMC layer are different. The vibration fatigue lifetime of solder joints increases gradually at first and then drops rapidly with the increase of the thickness of IMC layer......
Cyclic deformation behaviors of Ti-46Al-2Cr-2Nb-0.15B alloy during thermo-mechanical fatigue tests XIANG Hong-fu(项宏福)1, DAI An-lun(戴安伦)1, WANG Ji-heng(王冀恒)1, LI Hui(李 惠)1, YANG Rui(杨 锐)2 1... 110016, China Received 23 October 2009; accepted 15 August 2010 Abstract: Thermo-mechanical fatigue tests were carried out on the gamma-TiAl alloy in the temperature range of 500-800 °C under mechanical......
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temperature mechanical properties of the annealed LRF samples exceed those of casting alloy significantly, especially the stress-rupture lifetime reaches 661.7 h even while the test stress increases from initial value of 490 MPa to the final stress of 800 MPa gradually. Key words: laser rapid forming; Ti-6Al-4V; microstructure; mechanical properties; stress-rupture lifetime 1 Introduction  ......
on the crack growth threshold value and results in significant changes of residual fatigue lifetime of welded joints [19]. Owing to the complexity of experimental methods for calculating the opening ratio... J. Cent. South Univ. (2021) 28: 58-71 DOI: https://doi.org/10.1007/s11771-021-4586-0 Corrosion fatigue crack growth mechanisms in welded joints of marine steel structures XU Qian(徐倩), SHAO Fei(邵飞......
Fatigue fracture of high-strength Al-Zn-Mg-Cu alloy JIAN Hai-gen(蹇海根), JIANG Feng(姜 锋), WEN Kang(文 康), JIANG Long(蒋 龙), HUANG Hong-feng(黄宏锋), WEI Li-li(韦莉莉) School of Materials... to study the fatigue fracture of the T7451 Al-Zn-Mg-Cu alloy (470 ℃, 60 min+115 ℃, 8 h+165 ℃, 16 h). The study reveals mainly the microscopic structure of the alloy in the process of crack formation......
is frequently used to predict fatigue lifetime of metallic materials [27] due to its higher efficiency [28]. The Ramberg- Osgood curve was applied in cases that plastic strain amplitude is acquired using... J. Cent. South Univ. (2020) 27: 674-697 DOI: https://doi.org/10.1007/s11771-020-4323-0 Effects of microstructural heterogeneity on fatigue properties of cast aluminum alloys JIAO Yi-nan(焦忆楠)1, 2......