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Micro-pillar Compression of Ni-base Superalloy Single Crystals

Published online by Cambridge University Press:  23 January 2013

Kabir Arora ,
Kyosuke Kishida  and
Haruyuki Inui
Kabir Arora
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, 606-8501 JAPAN
Kyosuke Kishida
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, 606-8501 JAPAN
Haruyuki Inui
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, 606-8501 JAPAN
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Abstract

Micro-compression behavior of single crystalline Ni-base superalloy CMSX-4 has been studied especially focusing on a specimen size range comparable to the size of Ni3Al (γ’) precipitates of about 500 nm using square cross-section micro-pillar specimens. The variation in stress levels exhibited a considerable increase for smaller micro-pillar specimens with edge lengths below 2 μm. Shearing of both the Ni (γ) channels and the γ’ precipitates was observed indicating that stress levels were significant enough to cause the dislocations to cut into the γ’ precipitates at room temperatures.

Keywords

stress/strain relationshipstrengthmicrostructure

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References

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