变形速率对2219铝合金力学性能影响  

Effect of Strain Rate on Mechanical Performance of 2219 Aluminum Alloy

作　　者：李玉辰 谷春杰 张下陆 李永胜 龚立林 LI Yuchen;GU Chunjie;ZHANG Xialu;LI Yongsheng;GONG Lilin(Tianjin Long March Launch Vehicle Manufacturing Co.Ltd.,Tianjin 300462)

机构地区：[1]天津航天长征火箭制造有限公司,天津300462

出　　处：《宇航材料工艺》2024年第5期98-102,共5页Aerospace Materials & Technology

基　　金：天津市科技支撑项目(17YFZCGX00530)。

摘　　要：为研究变形速率与2219铝合金力学性能之间的关系,选取0.05、0.10、0.15、0.20、0.30、0.40 mm·s^(-1)共6种不同变形速率,通过单向拉伸试验,取得不同变形速率条件下2219铝合金的应力-应变曲线。为符合生产实际情况,分别选取0.075、0.30、0.40、0.55 mm·s^(-1)共4种更大的变形速率,更改材料状态,进行拉伸试验,并进行金相分析,进一步验证不同变形速率条件下2219铝合金力学性能变化趋势。结果表明,2219铝合金屈服强度及抗拉强度对变形速率的变化不敏感,随着变形速率不断增加,断后延伸率存在升高趋势。根据加工设备等实际情况,选择较高的变形速率(建议不超过0.40 mm·s^(-1)),以提高加工效率。In order to study the relationship between strain rate and mechanical performance of 2219 aluminum alloy,through the uniaxial tensile test in 6 different strain rates in 0.05、0.10、0.15、0.20、0.30、0.40 mm·s^(-1),the stress-strain curve of 2219 aluminum alloy was obtained under different strain rates.In order to accord with the actual production situation,selected 4 larger strain rate in 0.075、0.30、0.40、0.55 mm·s^(-1),changed the material state,conducted the uniaxial tensile test and metallographic analysis,the variation trend of mechanical performance of 2219 aluminum alloy was tested and verified under different strain rates.The results show that mechanical performance of 2219 aluminum alloy is insensitive in yield strength and tensile strength.As the strain rate goes up,percentage elongation has an upward trend.According to the actual situation of processing equipment,a higher deformation rate(recommended not to exceed 0.4 mm·s^(-1))is chose to improve processing efficiency.

关 键 词：变形速率 2219铝合金 屈服强度 抗拉强度 断后延伸率 

分 类 号：TG146[一般工业技术—材料科学与工程]