Sn含量对Al-10Si-1.5Mg-xSn合金阻尼和力学性能的影响
Effects of Sn Content on Damping and Mechanical Properties of Al-10Si-1.5Mg-x Sn Alloy
王嘉盛 1许吉 2张志豪 2赵梓尧2
作者信息
- 1. 甘肃东兴铝业有限公司,兰州 735100
- 2. 北京科技大学材料先进制备技术教育部重点实验室,北京 100083
- 折叠
摘要
研究了Al-10Si-1.5Mg-x Sn(x=0～6.0)合金的力学性能、阻尼性能和组织特征,分析了阻尼性能和力学性能随Sn含量变化的规律.结果表明,Sn加入使合金中的α-Al基体组织细化,并且Sn与Mg产生Mg2Sn相,导致Mg2Si相的数量减少;Sn含量增加到4.0%时,α-Al仍保持细小特征,β-Sn以及Mg2Sn数量较多且呈弥散均匀分布;Sn含量进一步增加至6.0%时,α-Al、β-Sn和Mg2Sn明显粗化.随着Sn含量从0升高至6.0%,合金的抗拉强度从206 MPa逐渐减小至169 MPa,伸长率基本保持在2.0%.合金的阻尼性能随着Sn含量的增加先提升后降低,Sn含量为4.0%时,阻尼性能较高,25℃/1 Hz、200℃/1 Hz和25℃/40 Hz条件下阻尼损耗因子tanh分别达到0.038、0.058和0.069.
Abstract
The mechanical properties,damping properties,and microstructure characteristics of Al-10Si-1.5Mg-x Sn(x=0～6.0%)alloy was investigated,and the variation law of damping and mechanical properties with different Sn content were analyzed.The results indicate that microstructure of the α-Al phase in the alloy is refined with Sn addi-tion,which reacts with Mg to generate Mg2Sn phase,resulting in the reduction of Mg2Si phases.With Sn content of 4.0%,α-Al remains the fined feature,while β-Sn and Mg2Sn are abundant and uniformly distributed.When Sn con-tent further increasing to 6.0%,α-Al、β-Sn and Mg2Sn are coarsened obviously.With Sn content increasing from 0 to 6.0%,the tensile strength of alloy is gradually decreased from 206 MPa to 169 MPa,and the elongation maintains 2.0%.With the increase of Sn content,the damping properties of alloy are increased firstly and then decreased,reach-ing a peak at 4.0%Sn.The damping loss factor tanh at 25℃/1 Hz,200℃/1 Hz and 25℃/40 Hz is 0.038,0.058 and 0.069,respectively.
关键词
铸造铝合金/Sn微合金化/阻尼性能/力学性能Key words
Cast Aluminum Alloy/Sn Microalloying/Damping Property/Mechanical Properties引用本文复制引用
基金项目
中央高校基本科研业务费资助项目(FRF-TP-20-030A1)
出版年
2024
NETL
NSTL
万方数据