Effects of multi-modification of rare earth oxides Pr_xO_y and La_xO_y on microstructure and tensile properties of casting Al-Cu alloy

详细信息    查看全文

• 作者：Yumei Xia ; Zhihao Bai ; Feng Qiu ; Shenbao Jin ; Qichuan Jiang
• 关键词：Aluminum alloy ; Rare earth ; Mechanical properties ; Microstructure ; ¦È&prime ; precipitate
• 刊名：Materials Science and Engineering: A
• 出版年：2012
• 出版时间：15 December, 2012
• 年：2012
• 卷：558
• 期：Complete
• 页码：602-606
• 全文大小：986 K

文摘

Through multi-modification with Pr_xO_y and La_xO_y, the tensile strength and elongation of casting Al?Cu alloy can reach to 580 MPa and 10.5 % , increased by 26 % and 50 % respectively than those of the unmodified alloy. Simultaneous increase in the tensile strength and elongation of the multi-modified alloys is suggested to be induced by the refined ¦Á-Al dendrites, the formation of Al?RE intermetallic compounds at the grain boundaries, and the most important, more homogeneously distributed nano-scale ¦È¡ä precipitates with higher diameter/thickness ratio.