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The Broadening of Crystallographic Orientation Distribution in Crept Ni-base Superalloys

Published online by Cambridge University Press:  26 February 2011

Toru Inoue ,
Katsushi Tanaka ,
Hiroki Adachi ,
Kyosuke Kishida  and
Haruyuki Inui
Toru Inoue
Affiliation:
inouetoru@t02.mbox.media.kyoto-u.ac.jp, Kyoto University, Materials Science and Engineering, Yoshida-Honmachi Sakyo-ku, Kyoto, 606-8501, Japan
Katsushi Tanaka
Affiliation:
k.tanaka@materials.mbox.media.kyoto-u.ac.jp, Kyoto University, Materials Science and Engineering, Yoshidahon-machi, Sakyo-ku, Kyoto, 606-8501, Japan
Hiroki Adachi
Affiliation:
hiroki.adachi@materials.mbox.media.kyoto-u.ac.jp, Kyoto University, Materials Science and Engineering, Yoshidahon-machi, Sakyo-ku, Kyoto, 606-8501, Japan
Kyosuke Kishida
Affiliation:
k.kishida@materials.mbox.media.kyoto-u.ac.jp, Kyoto University, Materials Science and Engineering, Yoshidahon-machi, Sakyo-ku, Kyoto, 606-8501, Japan
Haruyuki Inui
Affiliation:
haruyuki.inui@materials.mbox.media.kyoto-u.ac.jp, Kyoto University, Materials Science and Engineering, Yoshidahon-machi, Sakyo-ku, Kyoto, 606-8501, Japan
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Abstract

The crystallographic orientation distribution, and its change accompanied with tilting γ/γ boundaries in Ni-based single crystal superalloys have been investigated by a theoretical elastic-plastic calculation, X-ray diffractometry and SEM-EBSD analysis. The distribution of the crystallographic orientation has significantly broadened by creep deformations. The broadening can be explained by an unbalance of the amount of creep dislocations of each slip system, which agrees with the result of elastic-plastic calculations. Creep strain of superalloys crept at a condition forming the raft structure can be estimated by the measurement of the width of rocking curve of a diffraction peak.

Keywords

alloydislocationsx-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II05-28
Copyright
Copyright © Materials Research Society 2007

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