熱間圧延加工を施したMg-La-Zr合金の組織評価

DOI Web Site Web Site 被引用文献2件 参考文献3件

書誌事項

タイトル別名
  • Evaluation of Microstructures of Hot-Rolled Mg-La-Zr Alloys
  • ネツカン アツエン カコウ オ ホドコシタ Mg-La-Zr ゴウキン ノ ソシキ ヒョウカ

この論文をさがす

抄録

In a previous investigation concerning the ductility of Mg-La-Zr alloys, it was revealed that the tensile-tested Mg La-Zr alloys developed ultrafine grains within the deformed areas of the specimens. On the basis of those observations, in the present study, cast Mg-La-1.5Zr alloys with lanthanum content varying between 0 and 5.4 wt.% were hot-rolled and the microstructures examined by optical microscopy, X-ray diffraction, EBSD and KAM analyses to establish the characteristics of the hot-rolled and annealed specimens. It was revealed that the microstructures within the primary and eutectic αMg of hot-rolled Mg-5.4La-1.5Zr materials consisted of fine grains of 3.6 and 0.3 μm in average size, respectively. The grain growth of these fine grains within the primary αMg did not expand into the eutectic regions during annealing, while the fine grains within the eutectic αMg remained as fine as those observed in the hot-rolled materials even after annealing at 400 ℃. This is most likely due to the proximity of a eutectic Mg12La phase that may act as an obstacle to grain growth, suggesting the possibility of developing materials with bimodal microstructures. It was also found that the level of the basal texture in the hot-rolled and annealed materials of Mg-La-1.5Zr alloys was significantly lower than that of Mg-Zr alloy, demonstrating the beneficial effects of lanthanum.

収録刊行物

  • 塑性と加工

    塑性と加工 57 (661), 140-145, 2016

    一般社団法人 日本塑性加工学会

被引用文献 (2)*注記

もっと見る

参考文献 (3)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ