TEM OBSERVATION ON LOCAL DEFORMATION BAND AHEAD OF CRACK TIP
YAO Kefu University of Science and Technology Beijing; TANG Naiyong; CHEN Nanping Tsinghua University; Beijing
Cite this article:
YAO Kefu University of Science and Technology Beijing; TANG Naiyong; CHEN Nanping Tsinghua University; Beijing. TEM OBSERVATION ON LOCAL DEFORMATION BAND AHEAD OF CRACK TIP. Acta Metall Sin, 1991, 27(6): 1-8.
Abstract The local deformation bands formed ahead of crack tip both in ferrite and in austenite were in situ observed under TEM during deformation process of a ferrite-austenite duplex stainless steel. It is dominated by crack tip Schmid factors, dislocation shielding latent hardening and hardening coefficient. If the crack tip slip system was preferably activated by pure mode Ⅱ resolute and the decreasing rate of hardening coefficient was enough, then the local deformation band ahead of crack tip was easy to be formed.
1 Asaro R J. Adv Appl Mech, 1983; 26: 1 2 Tvergaard V, Needlman A, Lo K K. J Mech Phys Solids, 1981; 29: 115 3 李国琛,力学学报,1988;20:305 4 Embury J D, Korbel A, Raghunathan V S, Rys J. Acta Metall, 1984; 32: 1883 5 姚可夫.清华大学博士学位论文,1989 6 姚可夫,唐迺泳,陈南平.金属学报,1989;25:A213 7 Gardner R N, Wilsdorf H G F. Metall Trans, 1980; 11A: 659 8 Majumdat B S, Butns S J. Acta Metall, 1981; 29: 579 9 Lin I-H, Thomson R. Acta Metall, 1986; 34: 187 10 姚可夫,唐迺泳,陈南平.第五届全国断裂学术会议文集,桂林,1988:1564 11 Ohr S M, Mater Sci Eng, 1985; 72: 1 12 Pichl W, Schoeck G. Ser Metall, 1990; 24: 13
LI Xiaodong; WANG Yanbin;CHU Wuyang (University of Science and TechnologyBeijing; Beijing 100083); TIAN Fang; WANG Chen; BAI Chunli (Institute Of Chemistry; Chinese Academy of Sciences; Beijing 100080). INVESTIGATION OF LOADED CRACK TIP ON MICA SURFACE BY ATOMIC FORCE MICROSCOPY[J]. 金属学报, 1997, 33(6): 588-594.
[5]
P. B. Hirsch FRS(Department of Materials; University of Oxford; Parks Road; Oxford OX1 3 PH; UK Manuscript received ). MODELLING THE BRITTLE-DUCTILE TRANSITION[J]. 金属学报, 1997, 33(3): 225-232.
[6]
ZHENG Yesha; WANG Zhongguang; AI Suhua (State Key Laboratory of Fatigue and Fracture for Materials; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110015). DISLOCATION STRUCTURE OF FATIGUE CRACK TIP[J]. 金属学报, 1995, 31(3): 105-114.
ZHOU Xiangyang;LI Jin;LIU Guanglei;KE Wei Corrosion Science Laboratory; Academia Sinica; Institute of Corrosion and Protection of Metals; Academic Sinica; ShenyangWEI Xuejun;Institute of Corrosion and Protection of Metals Academia Sinica Shenyang110015. AN APPLICATION OF SPI TECHNIQUE FOR STUDING STRAIN DISTRIBUTION AT CF CRACK TIP[J]. 金属学报, 1993, 29(6): 77-81.
LI Qingsheng (Chingshen Li);T. BRETHEAU Taiyuan University of Technology University Paris Nord Department of Mathematics and Mechanics;Taiyuan University of Technology; Taiyuan 030024. EFFECT OF GRAIN BOUNDARY ON FATIGUE BEHAVIOUR OF Al BICRYSTALS[J]. 金属学报, 1990, 26(3): 55-60.