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Tensile Property of Cold-Rolled Foils of Ni-Based and Co-Based L12 Intermetallic Alloys

Published online by Cambridge University Press:  26 February 2011

Yasuyuki Kaneno ,
Takayuki Takasugi  and
Tadamichi Myoki
Yasuyuki Kaneno
Affiliation:
kaneno@mtr.osakafu-u.ac.jp, Osaka Prefecture University, Department of Materials Science, Graduate School of Engineering, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan
Takayuki Takasugi
Affiliation:
takasugi@mtr.osakafu-u.ac.jp, Osaka Prefecture University, Department of Materials Science, Graduate School of Engineering, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan
Tadamichi Myoki
Affiliation:
hz506@mtr.osakafu-u.ac.jp, Osaka Prefecture University, Department of Materials Science, Graduate School of Engineering, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan
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Abstract

Polycrystalline L12-type Ni3(Si,Ti), Co3Ti and Ni3Al alloys prepared through the thermomechanical process from arc-melted ingots were successfully cold-rolled to thin foils with a thickness of below 200μm. The cold-rolling with over 90% reduction in thickness was possible without providing intermediate annealing. The cold-rolled foils showed high tensile strength (~2GPa) at room temperature due to heavily cold rolling although no plastic elongation was observed. Room temperature tensile elongation increased with increasing annealing temperature, and reached to ~30-40% by high temperature annealing at 1173K. Among three kinds of intermetallic alloys, the Ni3(Si,Ti) foil annealed around at 900K exhibited an extremely high tensile strength and yield strength (over 2GPa) with a reasonable tensile elongation. The observed tensile properties, especially tensile strength at low temperature for the present intermetallic foils were found to be superior to those for the conventional alloys such as nickel based alloys and stainless steels.

Keywords

cold workingpolycrystalstrength
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II05-25
Copyright
Copyright © Materials Research Society 2007

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