The Effect of Co on the Temperature Dependence of Yield Stress in Ni<SUB>3</SUB>Ge Single Crystals

• Pak Han-ryong

  Graduate School, Osaka University

• Saburi Toshio

  Department of Materials Science and Engineering, Faculty of Engineering, Osaka University

• Nenno Soji

  Department of Materials Science and Engineering, Faculty of Engineering, Osaka University

抄録

The effect of Co addition up to 1.5 at% on the temperature dependence of yield stress in Ni₃Ge with Ll₂ structure has been investigated. Flow stress measurements were made on (Ni, Co)₃Ge single crystals with several different orientations. Slip systems were determined by two-surface trace analysis after compression at various temperatures between −196 and 600°C. Comparing the result of (Ni, Co)₃Ge with that of the binary Ni₃Ge, we obtained the following conclusions: The mechanical behavior of (Ni, Co)₃Ge is essentially the same as that of the binary Ni₃Ge. However, the Co addition lowers the peak-strength temperature of the binary Ni₃Ge at which the slip system changes from (111)[10\bar1] into (001)[1\bar10]. The drop of this temperature is orientation-dependent and governed by the relative change in critical resolved shear stress between the (111)[10\bar1] slip system and the (001)[1\bar10] slip system due to Co addition. The change in CRSS for the (111)[10\bar1] slip system due to Co is discussed in terms of a mechanism in which a part of the leading, a⁄3[2\bar11] superlattice Shockley partial cross-slips from a (111) plane onto a (010) plane.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 19 (1), 35-42, 1978

  社団法人 日本金属学会

キーワード

• General Engineering

詳細情報

• CRID: 1390001205118068736
• NII論文ID: 130003485605
• DOI: 10.2320/matertrans1960.19.35
• COI: 1:CAS:528:DyaE1cXktFSnsbc%3D
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/19/1/19_1_35/_pdf
• 本文言語コード: en
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