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of TC4 screw bolts produced by WST 2 结果与分析 图2所示为MJ12螺栓106 000次疲劳断裂试样断口宏观形貌. 图2 试样断口宏观形貌 Fig.2 Fracture morphology of sample 从图2可以看出试样断口表面比较平整,疲劳源区,裂纹扩展区和瞬时断裂区明显.宏观形貌上发现6个裂纹源,且...进行显微组织分析和疲劳断口观察.研究表明,该试件疲劳断口属于典型疲劳韧性断裂,未发现冶金及组织缺陷,材料显微组织细小均匀. 关键词:TC4;显微组织;疲劳断口 中图分类号:TG146.2+3 文献标志码:A Fatigue fracture of TC4 fasteners ZHANG Peng1, 2, LAI Yun-jin1, 2......
A DUCTILE FRACTURE CRITERION BASED ON THREE-DIMENSIONAL VOID MODEL X.H.Dong1,J.K.Huang1 (1.National Die & Mould CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030,China) Abstract:A fracture criterion derived from a microscopic point of view is proposed and has proved to be effective in the analysis of uniaxial tension. On the one hand, a method of predicting......
, and then mechanical impact was applied on them to obtain the fracture plane of the zinc coatings. JEOL JSM-7001F field emission scanning electron microscope was used to observe the morphology... Morphology and texture of high speed galvanized coatings on interstitial free steel sheet GU Xun-lei, SHAN Yu-qiao, LIANG Jing, LIU Chang-sheng Key Laboratory for Anisotropy and Texture......
. Figure 9 Fracture morphology of equiaxed microstructure at different testing temperature: In order to further investigate the fracture process of the TiBw/Ti6Al4V composites at high temperature, the SEM... to the excellent oxidation resistance below 600 °C. However, as the temperature increases to 700 °C, the fracture morphology exhibits gel-like, the dimples and tearing edges are completely indistinguishable......
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High cycle fatigue and fracture behavior of 2124-T851 aluminum alloy LI Xue(李雪)1, YIN Zhi-min(尹志民)1, NIE Bo(聂波)1, 2, ZHONG Li(钟利)1, 2, PAN Qing-lin(潘清林)1, JIANG Feng(姜锋)1 1. School of Materials...> Abstract: The high cycle fatigue properties and fracture behavior of 2124-T851 aluminum alloy were investigated roundly, including the fatigue crack growth rate, fracture......
; Fracture prediction in non-isothermal viscous pressure bulging of aluminum alloy sheet using ductile fracture criterion WANG Zhong-jin(王忠金), LIU Jian-guang(刘建光), LI Yi(李毅) School of Materials Science and Engineering......
; 文献标识码: A Mechanism of tin whisker morphology HAO Hu, DONG Wen-xing, SHI Yao-wu, XIA Zhi-dong, LEI Yong-ping (School of Materials Science and Engineering, Beijing University...: lead-free solder; rare earth; tin whisker; morphology 在电子产品的封装互连中,元件引脚一般要镀......