Effect of Grain Size on the Deformation Properties of a High-Purity Fe–50Cr Alloy at 293 and 773 K

• Kako Kenji

  Surface Science Department, Komae Research Laboratory, Central Research Institute of Electric Power Industry

• Takaki Seiichi

  Institute for Materials Research, Tohoku University

• Abiko Kenji

  Institute for Materials Research, Tohoku University

書誌事項

タイトル別名

• Effect of Grain Size on the Deformation Properties of a High-Purity Fe–50Cr Alloy at 293 and 773 K

抄録

The effect of grain size on the deformation properties of a high-purity Fe–50Cr alloy at 293 and 773 K was investigated by tensile tests and microstructural observations. Due to grain coarsening, the deformation mode at 293 K is changed from dislocation slips based on Lüders deformation to twinning. Due to grain coarsening, the deformation mode at 773 K is changed from dislocation slip based on P-L (Portevin-Le Chatelier) mechanism to twinning. The yield stress in each of the deformation modes at 293 and 773 K obeys the following equation (i.e. Hall-Petch relation): σ_y=σ₀+k_yd^−1⁄2. The coefficient k_S, which is k_y in the deformation mode due to dislocation slips, is different from the coefficient k_T due to twinning; k_S(293 K)=158, k_T(293 K)=1597 in kN·m^−3⁄2 and k_S(773 K)=266, k_T(773 K)=1995 in kN·m^−3⁄2.

収録刊行物

• Materials Transactions, JIM

  Materials Transactions, JIM 41 (1), 184-193, 2000

  社団法人 日本金属学会

キーワード

• Iron-50Chromium alloy
• iron chromium alloy
• deformation property
• grain size
• Hall-Petch relation
• Portevin-Le Chatelier mechanism
• deformation twin

詳細情報

• CRID: 1390001204246573312
• NII論文ID: 130003557270
• NII論文ID: 10005745744
• NII書誌ID: AA10699969
• DOI: 10.2320/matertrans1989.41.184
• COI: 1:CAS:528:DC%2BD3cXhvFSmsLw%3D
• ISSN: 2432471X
• ISSN: 09161821
• NDL書誌ID: 4975721
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4975721
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1989/41/1/41_1_184/_pdf
• 本文言語コード: en
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