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Creep Behavior of the Pseudo-Binary Ni3Si and Co3Ti

Published online by Cambridge University Press:  01 January 1992

Souji Hasegawa ,
Seiya Wada ,
Takayuki Takasugi  and
Osamu Izumi
Souji Hasegawa
Affiliation:
Sumitomo Metal Industry Ltd, Minatomachi 2-12-1, Joetsu, Japan.
Seiya Wada
Affiliation:
Sumitomo Metal Industry Ltd, Minatomachi 2-12-1, Joetsu, Japan.
Takayuki Takasugi
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aobaku, Sendai, Japan.
Osamu Izumi
Affiliation:
Professor Emeritus, Tohoku University, Sendai, Japan.
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Abstract

Creep behavior was investigated along the pseudo-binary line between L12-type Ni3Si and Co3Ti system with constant Si content. Addition of Co to Ni3Si and addition of Ni to Co3Ti enhanced creep strength due to precipitation hardening, respectively. Maximum creep strength on the pseudo-binary line was found at the composition which Co/(Ni+Co)=0.3 with 11 at.% Si content. The peak of creep strength on the pseudo-binary line was shifted to higher Co/(Ni+Co) value with decreasing Si content. Variation of creep strength was discussed based on metallo-graphic observations.

Also, the creep strength of these pseudo-binary alloys was improved by further addition of other elements, such as Hf and Ta.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 659
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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