Acta Metall Sin  1996, Vol. 32 Issue (11): 1159-1164    DOI:

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IN SITU TEM OBSERVATION OF NUCLEATING AND PROPAGATING OF MICROCRACKS IN STAINLESS STEEL UNDER TENSION

LI Hongqi; CHEN Qizhi; CHU Wuyang(University of Science and Technology Beijing; Beijing 100083)

LI Hongqi; CHEN Qizhi; CHU Wuyang(University of Science and Technology Beijing; Beijing 100083). IN SITU TEM OBSERVATION OF NUCLEATING AND PROPAGATING OF MICROCRACKS IN STAINLESS STEEL UNDER TENSION. Acta Metall Sin, 1996, 32(11): 1159-1164.

Abstract References Related Articles Recommended Metrics Download:  PDF(445KB)  Export:  BibTeX | EndNote (RIS)       Abstract  TEM in situ tensile tests of 310 stainless steel show that a dislocation free zone (DFZ) forms after equilibrium if the displacement keeps constant after many dislocations are emitted from a crack tip. The elastic DFZ is gradually thinned and the stress in DFZ will reach the cohesive strength resulting in nucleating of nanocracks in DFZ and blunting into voids. If continuously tensioning after crack tip emitted dislocations, and inhomogeneously thinning ahead of crack tip, then initiating and connecting of micro-voids(or micro-cracks) will be observed rather than DFZ, initiating of nanocracks and nanocracks' blunting into voids. The inversely piled-up dislocations ahead of a loaded crack tip can move towards the crack tip if unloading a little. Correspondent: LI Hongqi, Department of Materials Physics, University of Science and Technology Beijing,Beijing 100083 Key words:  310 stainless steel      in situ TEM tension      dislocation free zone      initiation of      Received:  18 November 1996      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1996/V32/I11/1159 1陈奇志,褚武扬,肖纪美．中国科学,1994;A24:2912张跃,褚武扬,王燕斌,肖纪美．中国科学,1994;A24:5513高克玮,陈奇志,褚武扬,肖纪美．中国科学,1994;A24:9934谷飚,张静武,乔利杰,陈奇志,褚武扬．金属学报,1994;30:A3625WilsdorfHGF．MaterSciEng,1983;59:16OhrSM．MaterSciEng,1985;72:17姚可夫,唐泳,陈南平．金属学报,1989;25:A2138姚可夫,唐泳,陈南平．金属学报,1991;27:A989张统一,黎晶,褚武扬．金属学报,1988;24(增刊):SA13410褚武杨．断裂力学基础．北京:科学出版社,1979:11211LinIH．MaterEng,1986;81:32512CherpanovGP．MechanicsofBrittleFracture．NewYork,NY:McGraw-HillInterBookComp,1979:29F [1] ZHU Jian, ZHANG Zhihao, XIE Jianxin. Plastic Deformation Behavior and Fracture Mechanism of Rare Earth H13 Steel Based on In Situ TEM Tensile Study[J]. 金属学报, 2020, 56(12): 1592-1604. [2] HUANG Yizhong; CHEN Qizhi; CHU Wuyang (University of Science and Technology Beijing; Beijing 100083)(Manuscript received 1995-03-28; in revised form 1995-07-03). IN SITU TEM OBSERVATION OF SCC IN 310 STAINLESS STEEL[J]. 金属学报, 1996, 32(1): 39-45. [3] WU Jiansheng; LIN Dongliang(Shanghai Jiaotong University;200030)(Manuscript received 94-03-07). FATIGUE CRACK INITIATION OF Nb MONOCRYSTALS AND ITS MECHANISM DURING CYCLIC DEFORMATION[J]. 金属学报, 1995, 31(2): 90-9. [4] GU Biao; ZHANG Jingwu; QIAO Lijie; CHEN Qizhi; CHU Wuyang; XIAO Jimei(University of Science and Technology Beijing). NUCLEATION AND BLUNTNESS OF NANOCRACKS IN BRASS[J]. 金属学报, 1994, 30(8): 362-367. [5] CHEN QiZhi;CHU Wuyang;QIAO Lijie;WANG Yanbin;XIAO Jimei(University of Science and Technology Beijing)(Manuscript received 22 December;1993). TEM IN SITU OBSERVATION OF BRITTLE CRACKING OF HYDROGEN CHARGED 310 STAINLESS STEEL UNDER TENSION[J]. 金属学报, 1994, 30(6): 248-256. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed