Acta Metall Sin  1996, Vol. 32 Issue (10): 1049-1055    DOI:

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DEFORMATION AND DAMAGE AT GRAIN BOUNDARY ON FATIGUED ALUMINUM BICRYSTALS

WANG Mingzhang;LIN Shi;XIAO Jimei(University of Science and Technology Beijing;Beijing 100083)(Departiment of Material Physics;University of Science and Technology Beijing;Beijing 100083)(Manuscript received 1996-01-18;in revised form 1996-06-20)

WANG Mingzhang;LIN Shi;XIAO Jimei(University of Science and Technology Beijing;Beijing 100083)(Departiment of Material Physics;University of Science and Technology Beijing;Beijing 100083)(Manuscript received 1996-01-18;in revised form 1996-06-20). DEFORMATION AND DAMAGE AT GRAIN BOUNDARY ON FATIGUED ALUMINUM BICRYSTALS. Acta Metall Sin, 1996, 32(10): 1049-1055.

Abstract References Related Articles Recommended Metrics Download:  PDF(612KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Fatigue tests were performed on specimens P(horizontal grain boundary) and V(vertical grain boundary) which were cut from the same aluminum bicrystal but their orientations are vertical to each other.It is shown that there are remarkable differences in the deformation behaviour and failure mechanisms between specimens P and V.In specimen P,more than two secondary slip systems are activated and primary slip band is repressed in the grain boundary effect zone,it is found that microcracks initiate along grain boundary where deformation is more severe than that in slip band and not uniform. In specimen V,however,the deformation at grain boundary is very small,it can be seen that damage occur only in primary slip bands which reach grain boundary.By considering the same grain boundary structures in specimens P and V,it seems that the effects of grain boundary structure(e.g.∑ value) on the deformation of grain boundary itself are less important.In addition,contrast experiments were done,and it is found that the fatigue cracks growing along the oblique grain boundary and the grain boundary with greater orientation difference between neighboring grains can be obviously accelerated. Key words:  grain boundary      fatigue damage      crack initiation      bicrystal.      Received:  18 October 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/I10/1049 1LimLC,RajR．ActaMetall,1984;32:11832夏月波,王中光．金属学报．1992;28．A513NeumannP,TonnessenA．StrengthofMetalsandAlloys(ICSMA8)．Oxford:PergamonPress,1989:7434KimWH,LairdC．ActaMetall,1978;26:7775MimaG,InokoF,AtagiK．JJpnInstMel,1979,43:536MimaG,InokoF,AtagiK．TransJIM,1980;21:897王明章,林实,钱仁根,肖纪美．金属学报、1995;31:B778WeiC,LinS,QianRG,HsiaoJM．ActaMetallMater．1991;39:2051 [1] XU Yongsheng, ZHANG Weigang, XU Lingchao, DAN Wenjiao. Simulation of Deformation Coordination and Hardening Behavior in Ferrite-Ferrite Grain Boundary[J]. 金属学报, 2023, 59(8): 1042-1050. [2] ZHANG Haifeng, YAN Haile, FANG Feng, JIA Nan. 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