Formation and mechanical properties of Mg97Zn1RE2 alloys with long-period stacking ordered structure

• Kawamura Yoshihito

  Department of Materials Science and Engineering, Kumamoto University

• Yamasaki Michiaki

  Department of Materials Science and Engineering, Kumamoto University

書誌事項

タイトル別名

• Formation and Mechanical Properties of Mg<SUB>97</SUB>Zn<SUB>1</SUB>RE<SUB>2</SUB> Alloys with Long-Period Stacking Ordered Structure
• Formation and mechanical properties of Mg85Zn1RE2 alloys with long period stacking ordered structure
• Formation and mechanical properties of Mg97Zn1RE2 alloy with long-period stacking ordered structure

抄録

We investigated the formation and mechanical properties of Mg₉₇Zn₁RE₂ alloys with long-period stacking ordered (LPSO) structures by examining RE = Y, La, Ce, Pr, Sm, Nd, Gd, Dy, Ho, Er, Tb, Tm and Yb. The LPSO phase developed for RE = Y, Dy, Ho, Er, Gd, Tb and Tm. LPSO Mg-Zn-RE alloys are either type I, in which the LPSO phase forms during solidification: Mg-Zn-Y, Mg-Zn-Dy, Mg-Zn-Ho, Mg-Zn-Er and Mg-Zn-Tm, or type II, in which the LPSO phase is nonexistent in as-cast ingots but precipitates with soaking at 773 K: Mg-Zn-Gd and Mg-Zn-Tb. The criteria for REs that form an LPSO phase in Mg-Zn-RE alloys are discussed. Mg-Zn-RE alloys with an LPSO phase, which were worked by hot extrusion, include high strength both at ambient and elevated temperatures, and good ductility. Their tensile yield strength, ultimate strength and elongation were 342–377 MPa, 372–410 MPa and 3–9%, respectively at ambient temperature, and 292–310 MPa, 322–345 MPa and 4–13% at 473 K. The LPSO Mg-Zn-RE alloys are promising candidates for lightweight structural materials.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 48 (11), 2986-2992, 2007

  公益社団法人 日本金属学会

キーワード

• magnesium-zinc-rare earth
• long-period stacking ordered structure
• structural material
• mechanical properties

詳細情報

• CRID: 1390001204250060288
• NII論文ID: 10019789726
• NII論文ID: 130004453425
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.mer2007142
• COI: 1:CAS:528:DC%2BD1cXkt1entA%3D%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 8979552
• Web Site: http://id.ndl.go.jp/bib/8979552
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8979552
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/48/11/48_MER2007142/_pdf
• 本文言語コード: en
• データソース種別:
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