Microstructures and mechanical properties of heat-resistant high-pressure die-cast Mg-4Al-6RE-0.3Mn (RE= La, Ce, Pr, Nd, wt.%) alloys
Mg-4Al-6RE-0.3Mn (RE=La, Ce, Pr, Nd, wt.％) magnesium alloys were prepared successfully by the high-pressure die-casting technique. The microstructures and tensile properties in the temperature range from room temperature to 200℃ were investigated. It was confirmed that the Mg-Al-RE-based alloys exhibited an outstanding die-cast character. The cross-section of test bar could be divided into the fine skin region and the relatively coarse interior region by a narrow band with fine structure. Two binary Al-RE (RE=La, Ce, Pr, Nd) phases with the former being the dominant one, Al11RE3 and Al2RE, occupied large grain boundary area. All the four alloys exhibited excellent tensile properties until 200℃, which were mainly attributed to the fine grain size and the strengthening phase Al11RE3 with high volume fraction, fine acicular/lamellar morphology, orderly stack distribution and good thermal stability. The results of this work provided a basis for further investigation of the new heat-resistant high-pressure die-cast magnesium alloys designed to serve at temperature up to 200℃.
Microstructures mechanical properties heat-resistant Mg-alloy
Zhe Leng Jinghuai Zhang Milin Zhang Jian Meng Ruizhi Wu
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, HarbinEngineerin State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of AppliedChemistry, C
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
265-270
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）