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Effect of W addition on microstructure and mechanical properties of Ni base dual two-phase intermetallic alloys

Published online by Cambridge University Press:  12 February 2015

Daisuke Edatsugi ,
Yasuyuki Kaneno ,
Hiroshi Numakura  and
Takayuki Takasugi
Daisuke Edatsugi
Affiliation:
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai 599-8531, Japan
Yasuyuki Kaneno
Affiliation:
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai 599-8531, Japan
Hiroshi Numakura
Affiliation:
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai 599-8531, Japan
Takayuki Takasugi
Affiliation:
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai 599-8531, Japan
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Abstract

The effect of W addition on microstructure and mechanical properties of Ni3Al (L12) and Ni3V (D022) two-phase intermetallic alloys has been investigated. W was added to the base alloy composition, Ni75Al10V12Nb3 (at. %) in place of either Ni, Al or V. The W-added alloy ingots were heat-treated in vacuum at 1575 K for 5 h. The majority of W-added alloys showed a dual two-phase microstructures while the alloy in which 3 at. % W substituted for Ni exhibited the dual two-phase microstructure containing W solid solution dispersions. Vickers hardness was significantly enhanced by W addition, which is primarily due to solid-solution strengthening.

Keywords

scanning electron microscopy (SEM)microstructureW
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1760: Symposium YY – Advanced Structural and Functional Intermetallic-Based Alloys , 2015 , mrsf14-1760-yy05-15
Copyright
Copyright © Materials Research Society 2015 

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