Investigation of Subboundaries Evolution in Superplastically Deformed NiAl by Positron Lifetime

J Mater Sci Technol ›› 2003, Vol. 19 ›› Issue (04): 373-375.

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Investigation of Subboundaries Evolution in Superplastically Deformed NiAl by Positron Lifetime

Xinghao DU, Jianting GUO, Bide ZHOU, Liangyue XIONG

Department of Superalloys, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:1900-01-01 Revised:1900-01-01 Online:2003-07-28 Published:2009-10-10
Contact: Jianting GUO

Abstract

Abstract: In order to study the subboundaries evolution in superplastically deformed NiAl, the positron lifetime change during superplastic deformation process was measured. It is shown that the superplastic deformation of NiAl has not influence on its τ2, the newly recrystallized grain boundaries formed during entire superplastic deformation process belong to the calegory of subboundaries and have not contribution to the superplastic strain.

Key words: NiAl, Positron lifetime, Superplasticity, Boundaries

Xinghao DU, Jianting GUO, Bide ZHOU, Liangyue XIONG. Investigation of Subboundaries Evolution in Superplastically Deformed NiAl by Positron Lifetime[J]. J Mater Sci Technol, 2003, 19(04): 373-375.

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Investigation of Subboundaries Evolution in Superplastically Deformed NiAl by Positron Lifetime

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