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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

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 1672-7029
CN 43-1423/U

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