Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 4    No. 3    September 1994

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MOLECULAR STATIC SIMULATION OF ENERGY FEATURESOF INTERACTION BETWEEN GRAIN BOUNDARYAND DISLOCATIONS IN Ni3Al ALLOY
Chen Da ; Lu Min ; Lin Dongliang

Department of Mazerials Science; Shanghai Jiao Tong University; Shanghai 200030

Abstract:The molecular static relaxation method has been used to simulate the energy features of theinteraction between the grain boundary(GB) and dislocations in Ni3Al alloys. The effects of various factors, such as the GB chemistry , the dissociation type of superdislocation , the geometrical index of the GB, boron segregation and an applied stress on the energy feature of the interactionhave been studied. Their relations with the mechanical behavior of the GB and mechanism responsible for boron-enhanced ductility have also been discussed.

 

Key words: Ni3Al Intermetallics grain boundary structure dislocation computer simulation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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