Development of High Strength Magnesium Alloys by Rapid Solidification

快速凝固高强度镁合金的开发

• 批准号: 11225203
• 负责人: KAWAMURA Yoshihito
• 金额: $ 21.57万
• 依托单位: Kumamoto University (2000-2002)Tohoku University (1999)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11225203/
• 关键词: Magnesium alloy; Yttrium; Zinc; Rapidly soridification; Long period stacking structure; Superplasticity; High strength; Nano-structured materials; マグネシウム; 軽合金; 急速凝固; 非平衡; 超塑性; メカニカルアロイング; 水素; 高温強度; ガスアトマイズ; 固化成形; 高強度; 機械的性質; 非晶質; 構造材料

High-strength magnesium alloys have been developed by rapidly solidified powder metallurgy (RS P/M) processing, as consequence of preliminary investigations of alloy compositions using the melt-spun Mg-X1-X2 (X=Li, Al, Zn, Ca, Sn and Y) alloys. Mg_<97>Zn_1Y_2 and Mg_<96>Zn_1Y_3 (at.%) alloys exhibited high tensile yield strength, good ductility, high elevated-temperature strength and high-strain-rate superplasticity that have been realized. The Mg_<97>Zn_1Y_2 RS P/M alloy essentially consisted of hcp-Mg fine grains of 100 to 200 nm in diameter with and without novel 18R-type long period stacking structure. The 18R-type long period stacking structure improves the strength of the Mg_<97>Zn<1>Y_2 RS P/M alloys as well as the fine grains. Furthermore, the long period stacking structure exhibits high thermal stability. These RS P/M : magnesium alloys are the promising candidate among lightweight structural materials.

通过对快淬Mg-X_1-X_2（X=Li、Al、Zn、Ca、Sn和Y）合金成分的初步研究，采用快速凝固粉末冶金（RS P/M）工艺制备了高强度镁合金。Mg_<97>Zn_1Y_2和Mg_<96>Zn_1Y_3（at.%）合金表现出高的拉伸屈服强度、良好的延展性、高的高温强度和已经实现的高应变速率超塑性。MgZn <97>1 Y2 RS粉末冶金合金基本上由直径为100 ~ 200 nm的hcp-Mg细晶组成，有或没有新颖的18 R型长周期堆垛结构。18 R型长周期堆垛结构提高了Mg_<97>Zn <1>Y_2快速凝固粉末冶金合金的强度，细化了合金的晶粒。此外，长周期堆叠结构表现出高的热稳定性。这类粉末冶金镁合金是一种很有前途的轻质结构材料。

项目成果

Y.Kawamura: "High Strength Nanocrystalline Mg-Al-Ca Alloys Produced by Rapidly Solidified Powder Metallurgy Processing"Materials Science Forum. 350-351. 111-116 (2000)

Y.Kawamura：“快速凝固粉末冶金加工生产的高强度纳米晶镁铝钙合金”材料科学论坛。

河村能人: "ナノ結晶協力マグネシウム合金の開発"まてりあ. 41. 644-649 (2002)

Yoshito Kawamura：“纳米晶协同镁合金的开发”Materia 41. 644-649 (2002)。

Y.Kawamura,K.Hayashi: "Rapidly Solidified Powder Metallurgy Mg_<97>Zn_1Y_2Alloys with Excellent Tensile Yield Strength above 600 MPa"Mater.Trans.. 42(印刷中). (2001)

Y.Kawamura、K.Hayashi：“快速凝固粉末冶金 Mg_<97>Zn_1Y_2 合金，拉伸屈服强度高于 600 MPa”Mater.Trans.. 42（出版中）。

K.Hayashi: "Structure and Mechanical Properties of Rapidly Solidifield Mg-X(X=Zn,Al,Ca,Li)Alloys"Mater.Sci.Forum. (2000)

K.Hayashi：“快速凝固Mg-X(X=Zn,Al,Ca,Li)合金的结构和机械性能”Mater.Sci.Forum。

A.Inoue: "High strength nanocrystalline Mg-based alloys"Materials Science Forum. 386-3. 509-517 (2002)

A.Inoue：“高强度纳米晶镁基合金”材料科学论坛。