钇含量对铸态镁锌锆合金组织及力学性能的影响
Effect of Y Contents on Microstructure and Mechanical Properties for as-Cast Mg-Zn-Zr Alloy
摘 要
研究了不同钇含量(质量分数为0, 0.94%, 2.67%, 4.61%)对铸态Mg-6Zn-0.7Zr合金显微组织及力学性能的影响。结果表明: 钇元素主要富集在晶界; 晶界析出相呈鱼骨状和块状, 并逐渐连续成网状; 当钇的质量分数为0.94%时, 合金主要为α-Mg、Mg7Zn3和Mg3Y2Zn3相; 当钇的质量分数为2.67%时, 析出相为α-Mg、Mg12YZn和Mg3Y2Zn3相; 随着钇含量的增多, 合金的抗拉强度、屈服强度和伸长率先增大后减小, 当钇的质量分数为2.67%时, 合金的性能最佳, 抗拉强度和屈服强度分别为250.4, 125.3 MPa, 伸长率为12.73%。
组织
力学性能
钇元素
magnesium zinc zirconium alloy
microstructure
mechanical property
Y element
Abstract
The effects of different Y contents (0, 0.94wt%, 0.267wt% and 4.61wt%) on the microstructure and mechainical properties of the as-cast Mg-6Zn-0.7Zr were studied. The results show that Y elements was rich in grain boundaries. The precipitation phases appeared in fishbone-like and block, and continuously distributed along grain bondaries in network form. When the content of Y element was 0.94wt%, the phases was α-Mg, Mg7Zn3 and Mg3Y2Zn3, and when the content of Y element was 2.67wt%, the phases was α-Mg, Mg12YZn and Mg3Y2Zn3. The tensile strength, yield strength and elongation increased firstly and then decreased with the increase of Y contents. The properties of the alloy was best when the content of Y element was 2.67wt%, and the tensile strength, yield strength and elongation was 250.4, 125.3 MPa and 12.73%, respectively.
中图分类号 TG146.2
所属栏目 试验研究
基金项目
收稿日期 2011/7/22
修改稿日期 2012/2/1
网络出版日期
作者单位点击查看
备注宋奇慧(1975-), 女, 黑龙江拜泉人, 讲师, 工程师, 硕士。
引用该论文: SONG Qi-hui,WANG Xin-nian,ZHU Zhao-jun. Effect of Y Contents on Microstructure and Mechanical Properties for as-Cast Mg-Zn-Zr Alloy[J]. Materials for mechancial engineering, 2012, 36(7): 21～24
宋奇慧,王新年,朱兆军. 钇含量对铸态镁锌锆合金组织及力学性能的影响[J]. 机械工程材料, 2012, 36(7): 21～24
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参考文献
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