摘要
利用金相显微镜、显微硬度计及拉伸试验机对不同压力挤压铸造Mg-Al-Ca合金的组织和性能进行了研究。结果表明,提高压力降低了挤压铸造合金中第二相的比例及其孔隙率。在30 MPa以下,随着压力的提高,合金的伸长率、抗拉强度、显微硬度和屈服强度均逐渐提高,在高压下挤压铸造合金的韧性较佳。
Microstructure and mechanical properties of Mg-Al-Ca alloy prepared by squeeze casting under different pressures were investigated by using optical microscope, microhardness tester and tensile test machine. The results show that increasing applied pressure decreases the fraction of second phase and porosity of the alloy. When the squeeze pressure lower than 30 MPa, the elongation, tensile strength, microhardness and yield strength of the alloy increase gradually with the increase of the pressure. A preferable toughness is obtained under higher pressure.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第4期102-104,共3页
Heat Treatment of Metals
关键词
Mg-Al-Ca镁合金
挤压铸造
压力
组织性能
Mg-Al-Ca magnesium alloy
squeeze casting
pressure
microstructure and mechanical properties
