金属学报  1985, Vol. 21 Issue (1): 34-149

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含6.5%Al的镍基合金中的位错与层错结构

黄孝瑛

冶金工业部钢铁研究总院

DIRECT OBSERVATION ON DISLOCATION AND STACKING FAULT CONFIGURATION OF Ni-BASE ALLOY CONTAINING 6.5% A1

HUANG Xiaoying Central Iron and Steel Research Institute;Ministry of Metallurgical Industry;Beijing

黄孝瑛. 含6.5%Al的镍基合金中的位错与层错结构[J]. 金属学报, 1985, 21(1): 34-149.
. DIRECT OBSERVATION ON DISLOCATION AND STACKING FAULT CONFIGURATION OF Ni-BASE ALLOY CONTAINING 6.5% A1[J]. Acta Metall Sin, 1985, 21(1): 34-149.

摘要 参考文献 相关文章 Metrics 全文: PDF(3899 KB)   摘要: 对镍铝合金的位错与层错结构及其运动规律,进行了电子衍衬观察.主要结果如下:1.固溶处理不同淬火速度对缺陷组态有重大影响,在大的淬火速度下,观察到空位作三维聚集形成的有特征形貌的宏观孔洞.2.固溶处理加形变,普遍观察到位错塞积现象,存在着一个出现塞积群的临界形变量.提出了一个定义塞积位错列密度的新概念,用它来讨论材料的强度问题较为合理.3.讨论了形变试样的某些位错反应,对扩展位错的运动规律进行了动态观察. Abstract：An electron diffraction contrast observation on the dislocation and stackingfault structure and their movement behaviour in Ni-base alloy containing 6.5% Alwas carried out by means of TEM.The experimental results show as:1.Solution heat treatment processes with different quenching rates influencesignificantly upon the defect configuration.Under high quenching speed,a lot ofmacroholes with characteristic morphology have been observed and analyzed crys-tallographically.2.After solution heat treatment specimens suffered a certain extent of defor-mation plie-ups were observed frequently.There is a critical value of deformationto induce plie-ups in this alloy.Based on the experimental facts,a new conceptabout pile up dislocation density was suggested,which may be useful to describethe relationship between strength and microstructure of the alloy.3.Some interesting reactions of pile-ups have been analyzed and discussed.An in-situ observation of movement of extensive dislocations and the morphologyof leading partials was made by successive photograph technique in TEM.It showseven if dislocations on the same slip plane and under the same thermal stress con-dition,they may be dirived in quite different degrees,some of them extend intotwo partials,the other does not.4.The moving dislocation presented various appearances,a“bow-in”like ora“bow-out”like curve,which does not always coincide with the moving direc-tion of dislocations.This can be explained in consideration of complex stress stateassociated with them. 收稿日期: 1985-01-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 黄孝瑛 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1985/V21/I1/34 1 Cotrell,A.H.,Trans.Metall.Soc.AIME,212(1958) ,192． 2 Armstrong,R.;Codd,I.;Donthwaite,R.M.;Petch,N.J.,Philos.Mag.,7(1962) ,45． 3 郭可信;林保军,物理学报,29(1980) ,494． 4 Whelan,M.J.;Hirsch,P.B.;Horne,W.;Bollmann,W.,Proc.R.Soc.(London),A240(1957) ,524．i No related articles found! Viewed Full text Abstract Cited   Shared      Discussed