OS0303 長周期相を有するマグネシウム合金の変形組織(非立方晶型金属材料の変形現象とそのモデル化,オーガナイズドセッション)

概要

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Ternary Mg-Zn- Y alloy sheets with a Long Period Ordered (LPO) phase were prepared by hot-rolling at 623K. Volume fraction of the LPO phase was estimated more than 85% in a Mg_<85>Zn_6Y_9 (at.%) cast alloy. (00018) pole figure showed basal plane of the LPO phase has a tendency to orient a plane of sheet by hot-rolling. However, it was considered that the basal texture of the LPO phase is difficult compare with Mg phase, due to introduce a kink formation. Compression test was performed in Mg_<85>Ni_6Y_9 (at.%) cast alloy at room temperature. Yield strength of the Mg_<85>Ni_6Y_9 (at.%) cast alloy was 365MPa which is higher than that of pure-Mg. Also, deformation kink bands were frequently observed in deformed LPO phase, like as observed in hot-rolled Mg-Zn-Y alloy sheet. It was observed that the basal plane of the LPO phase has tendency to orient a compression plane by compression test at room temperature.
一般社団法人日本機械学会の論文
2009-07-24