Ｍｇ１２ＺｎＹ相を有するＭｇ‐Ｚｎ‐Ｙ圧延板の組織と機械的特性
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Ternary Mg–Zn–Y alloy sheets with several volume fractions of a Mg12ZnY phase were prepared by hot-rolling at 623 K. Volume fraction of the Mg12ZnY phase was increased with increasing of Zn and Y contents in the Mg100–x–yZnxYy (x=1~6, y=2~9 at%) alloys, and achieved more than 85% in an Mg85Zn6Y9 alloy. (002) pole figures showed both of basal planes of the Mg12ZnY- and Mg phases have a tendency to orient the plane of the sheet by hot-rolling. However, it was considered that the formation of a basal texture of the Mg12ZnY phase is difficult compared with the Mg phase, due to introduce a kink deformation. An Mg90.5Zn3.25Y6.25 alloy sheet exhibited a 0.2% proof strength, an ultimate tensile strength, and an elongation of 353 MPa, 400 MPa, and 5%, respectively, at room temperature, and 279 MPa, 375 MPa, and 12%, respectively, at 523 K. Although elongation was slightly limited compared with commercial magnesium sheets, the Mg90.5Zn3.25Y6.25 alloy sheet exhibited high strength over a wide temperature range compared to commercial magnesium alloys.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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