Ca含量对时效态Mg-6.5Al-xCa-1Sn-0.3Sr镁合金显微组织和性能的影响
Effect of Ca Content on Microstructure and Properties of As-Aged Mg-6.5Al-xCa-1Sn-0.3Sr Magnesium Alloys
热焱 1邱克强2
作者信息
- 1. 辽宁省交通高等专科学校,辽宁沈阳 110122
- 2. 沈阳工业大学材料科学与工程学院,辽宁沈阳 110870
- 折叠
摘要
通过XRD、SEM和性能测试研究了Ca含量的变化对时效态Mg-6.5Al-xCa-1Sn-0.3Sr(x=1,1.5,2,2.5)镁合金的显微组织和性能的影响.结果表明,时效态合金主要由α-Mg和Al2Ca相组成,Al2Ca相成网状分布.合金的抗拉强度和伸长率随着Ca加入量的增加而逐渐降低,当Ca含量为1%时合金的拉伸性能最佳,而合金的硬度随着Ca的加入而增加.在175℃、70 MPa下,Ca的添加使时效态合金的稳态蠕变速率降低.
Abstract
The effect of Ca content on the microstructure and properties of as-aged Mg-6.5Al-xCa-1Sn-0.3Sr(x=1,1.5,2,2.5)magnesium alloys were investigated by XRD,SEM and properties tests.The results showed that as-aged alloys mainly consist of α-Mg and Al2Ca phases,the addition of Ca causes the Al2Ca phase in as-aged alloys to coarsen into a network.The tensile strength and elongation of as-aged alloys gradually decreased with the addition of Ca,when the Ca content was 1.0wt.%,the tensile properties of as-aged alloys were the best,but the hardness of as-aged alloys increased with the addition of Ca.At 175℃,70 MPa,the steady-creep rate of as-aged alloys were reduced with Ca addition.
关键词
Mg-Al-Ca-Sn-Sr镁合金/显微组织/力学性能/蠕变性能Key words
Mg-Al-Ca-Sn-Sr magnesium alloy/microstructure/mechanical properties/creepproperties引用本文复制引用
基金项目
辽宁省教育厅科研项目(LJKMZ20222117)
出版年
2024
国家科技期刊平台
NSTL
万方数据