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J. Jpn Inst. Metal 56(10) 1214.pdf1.11 MBPDFView/Open
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Title: 両サイト置換型元素Crを含むNi3Al単結晶の変形挙動
Other Titles: Deformation Behaviour in Ni3Al Single Crystals Containing Cr Being Substituted for Both Al- and Ni-Sites
Authors: 三浦, 誠司1 Browse this author →KAKEN DB
三島, 良直2 Browse this author
鈴木, 朝夫3 Browse this author
Authors(alt): Miura, Seiji1
Mishima, Yoshinao2
Suzuki, Tomoo3
Keywords: plastic behaviour
single crystal
chromium addition
Issue Date: 1-Oct-1992
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: 56
Issue: 10
Start Page: 1214
End Page: 1220
Publisher DOI: 10.2320/jinstmet1952.56.10_1214
Abstract: The temperature, orientation and strain-rate dependences of strength are investigated in single crystalline Ni3Al-4Cr (74 at%Ni-22 at%Al-4 at%Cr) in which Cr substitutes both Ni and Al sites. It is found that the solid solution hardening evaluated at 77 K by Cr addition is small and that the activation energy for the thermally activated cross slip yielding the mechanical anomaly becomes slightly larger by the addition. In the temperature range and for an orientation near [\bar111] where cube slip governs the plastic deformation, the athermal component of the critical resolved shear stress (CRSS) is evaluated to be as small as 40 MPa, whereas the thermal component at 0 K is estimated to be 2250 MPa being as large as the value reported for the Ni-rich Ni3Al single crystals. For an orientation near [001], where the octahedral viscous flow governs the plastic behaviour, the activation energy for the steady-state deformation is evaluated to be 317 kJ/mol which is in good agreement with the value for diffusion of Cr in Ni3Al. It is also found that the oxididation resistance of Ni3Al-4Cr is superior to Ni3(Al, 5.0Ti) but is inferior to Ni3(Al, 5.0Si). It is concluded, therefore, that the stoichiometry of Ni3Al-Cr cannot be made unequivocally.
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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