铸造技术2011，Vol.32Issue(2)：214-218,5.
铸态Mg-4Al-2Si合金的显微组织与高温力学性能
Microstructure and Elevated Temperature Mechanical Properties of As-cast Mg-4Al-2Si Magnesium Alloy
摘要
Abstract
The Microstructure and elevated temperature mechanical properties of the as-cast Mg4Al-2Si(AS42) Magnesium Alloy were investigated by optical microscope, scanning electron microscope, XRD analysis and tensile test. The results show that the as-cast AS42 alloy are composed of α-Mg matrix, β-Mg17Al12 and Mg2Si phase. The reticular divorced eutectic β-Mg17Al12 distribution along the grain boundaries, the massive primary Mg2Si phase distribution in the matrix random, and the coarse 'Chinese script' eutectic Mg2Si phase distribution along the grain boundaries or transcrystalline. According to the results of the elevated temperature transient tensile properties of alloy at 150 ℃, it is found that the ultimate tensile strength, yield strength, and rate of elongation is 97 MPa, 58 MPa and 18％ respectively. The fracture forms of the as-cast alloy is quasi-cleavage brittle fracture.关键词
Mg-4Al-2Si镁合金/显微组织/高温力学性能分类
金属材料引用本文复制引用
宋佩维..铸态Mg-4Al-2Si合金的显微组织与高温力学性能[J].铸造技术,2011,32(2):214-218,5.基金项目
陕西省自然科学基础研究计划资助项目(NO.2010 JM 6009) （NO.2010 JM 6009）
陕西省教育厅自然科学专项科研计划资助项目(NO.2010 JK470) （NO.2010 JK470）
