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In-Situ Observation of Grain Boundary Behavior in Ni3 Al Alloys During Tensile Deformation in Sem

Published online by Cambridge University Press:  26 February 2011

Dongliang Lin  and
Da Chen
Dongliang Lin
Affiliation:
Shanghai Jiao Tong University, Shanghai, China
Da Chen
Affiliation:
Shanghai Jiao Tong University, Shanghai, China
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Abstract

The deformation behavior of Ni3Al alloys with various chemical compositions and subjected to different heat treatments were in-situ observed in SEN. Moreover, in-situ observations of slip trace are supplemented by the direct observation of dislocation arrangements by TEM. In boron-doped Ni3Al alloys it is shown that close to the grain boundary there exists a thin slip transition region, within which slip lines are reoriented or other slip systems are operated to produce a local strain accommodation and to relax the stress concentration at grain boundaries. However, boron-enhenced ductility is seriously affected by alloy stoichiometry, the addition of a tertiary alloy element and heat treatment, etc.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 217
Copyright
Copyright © Materials Research Society 1989

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References

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