INTERACTIONS BETWEEN LATTICE DISLOCATIONS AND GRAIN-BOUNDARIES IN L1(2) ORDERED COMPOUNDS INVESTIGATED BY IN-SITU TRANSMISSION ELECTRON-MICROSCOPY AND COMPUTER MODELING EXPERIMENTS

被引：6

作者：

DEHOSSON, JTM

PESTMAN, BP

机构：

[1] Department of Applied Physics, Materials Science Center, University of Groningen, 9747 AG Groningen

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 164卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90704-I

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper the interaction between lattice dislocations and grain boundaries in Ni3Al is reported as investigated by means of in situ transmission electron microscopy deformation experiments and modelling experiments. In particular, the interaction between screw dislocations and a coherent twin boundary was analysed in detail. The results of the in situ straining indicate that [110] screw dislocations impinging on a SIGMA = 3 coherent twin boundary, which have a Burgers vector parallel to the grain boundary plane, can be transmitted to the symmetric slip plane in the other grain under the influence of an applied stress. A one-to-one comparison with the results of a computer modelling study of exactly the same system in Ni3Al can be made and the experiment agrees with the simulations.

引用

页码：415 / 420

页数：6

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