Ｍｇ‐Ｚｒ合金の結晶粒微細化機構と鋳造組織

• 田村 洋介

  千葉工業大学大学院

• 河野 紀雄

  千葉工業大学

• 茂木 徹一

  千葉工業大学

• 佐藤 英一郎

  千葉工業大学

書誌事項

タイトル別名

• Grain refining mechanism and casting structure of Mg-Zr alloy.
• Mg-Zr合金の結晶粒微細化機構と鋳造組織
• Mg-Zr ゴウキン ノ ケッショウリュウ ビサイカ キコウ ト チュウゾウ

抄録

The investigation was performed to examine the influence of undissolved Zr particles in molten magnesium on the grain refinement of Mg–Zr alloy. A Mg–30%Zr master alloy was added to the molten pure magnesium at 993 K. All samples revealed that 0.4%Zr was dissolved in the pure magnesium. Sedimentation of Zr particles occured for holding the molten magnesium up to 7.2 ks at the temperature of 993 K and the grain size of the solidified structure became larger with prolonging holding time. However, when the molten metal was agitated just before pouring, grain refinement always occured. It is suggested that the undissolved Zr particles in the melt are nucleation sites of the solidifying magnesium or primary zirconium crystals. Zr content was the lowest around the undissolved Zr particles observed in Zr–enriched cored structure, because the undercooling occured for growth of the predendritic region.

収録刊行物

• 軽金属

  軽金属 48 (4), 185-189, 1998

  一般社団法人 軽金属学会

キーワード

• grain refinement
• Mg–30%Zr master alloy
• undissolved Zr
• nucleation
• undercooling

詳細情報

• CRID: 1390282681311851392
• NII論文ID: 10002664655
• NII書誌ID: AN00069773
• DOI: 10.2464/jilm.48.185
• COI: 1:CAS:528:DyaK1cXislOktr8%3D
• ISSN: 18808018
• ISSN: 04515994
• ISSN: http://id.crossref.org/issn/04515994
• NDL書誌ID: 4459440
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4459440
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可