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Ni3(Al, Ti) 単結晶の流動応力におよぼす歪速度の影響

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Title: Ni3(Al, Ti) 単結晶の流動応力におよぼす歪速度の影響
Other Titles: The Effect of Strain Rate on the Flow Stress of Ni3(Al, Ti) Single Crystals
Authors: 三浦, 誠司1 Browse this author →KAKEN DB
落合, 鍾一2 Browse this author
大矢, 義博3 Browse this author
三島, 良直4 Browse this author
鈴木, 朝夫5 Browse this author
Authors(alt): Miura, Seiji1
Ochiai, Shouichi2
Oya, Yoshihiro3
Mishima, Yoshinao4
Suzuki, Tomoo5
Keywords: intermetallic compound
single crystal
flow stress
strain rate effect
Peierls-Nabarro mechanism
positive temerature dependence of strength
low temperature deformation
high temperature deformation
Issue Date: 1-May-1987
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals
Volume: 51
Issue: 5
Start Page: 400
End Page: 406
Publisher DOI: 10.2320/jinstmet1952.51.5_400
Abstract: Single crystals of Ni3(Al, Ti) with selected orientations were deformed in compression at temperatures between 77 K and 1223 K with strain rates varying from 1.4×10−5 to 1.4×10−2 s−1, in order to investigate the effect of strain rate on the flow stress. Results obtained are as follows: In the intermediate temperature range where the strength increases anomalously with increasing temperature, the strain rate dependence of flow stress is very weak. This phenomenon is likely to be characteristic of intermetallic compounds with L12 structure which show positive temperature dependence of strength. On the other hand, in the higher temperature range where the flow stress decreases gradually and {100} slip occurs predominantly, the strength is very sensitive to the strain rate and shows a normal strain rate dependence. Judging from the magnitudes of activation energy and activation volume for higher temperature deformation, it is concluded that {100} slip is controlled by the Peierls-Nabarro mechanism. Equations to relate flow stress and strain rate for {100} slip are derived, and they well account for the experimental results at all strain rates tested.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三浦 誠司

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