电焊机2025，Vol.55Issue(4)：1-7,7.DOI:10.7512/j.issn.1001-2303.2025.04.01
电弧增材制造2319铝合金的动态力学性能
Dynamic Mechanical Properties of 2319 Aluminum Alloy Fabricated by Wire and Arc Additive Manufacturing
摘要
Abstract
Aluminum alloy structural components are subjected to complex loads during their service life,necessitating an investigation into their mechanical behavior under various strain rates to understand both their static and dynamic mechani-cal properties.In this study,2319 aluminum alloy thin-walled specimens were fabricated using wire and arc additive manu-facturing technology.Quasi-static compression tests and split Hopkinson pressure bar tests were employed to analyze their compressive mechanical properties under quasi-static conditions and at different strain rates.The findings reveal that the as-deposited 2319 aluminum alloy demonstrates a pronounced strain rate hardening effect,with the dynamic stress-strain curve shifting upwards relative to the static curve.Both the yield strength and the maximum flow stress of the specimens increase with the elevation of strain rate;however,the strain hardening rate exhibits an inverse trend.The increments in yield strength and maximum flow stress diminish progressively,likely due to the interplay between strain rate-induced hardening and adia-batic heating-induced softening effects.Additionally,as the strain rate increases,the columnar grains in the vertical direction of the specimens tend to elongate more towards the direction perpendicular to the compressive load.The texture strength along the<001>direction,which is the deposition direction,diminishes gradually,and the kernel average misorientation in-creases.There is also a slight decrease in the proportion of small-angle grain boundaries.关键词
2319铝合金/电弧增材制造/动态力学性能/变形组织Key words
2319 aluminum alloy/wire arc additive manufacturing/dynamic mechanical properties/deformation structure分类
金属材料引用本文复制引用
郭一鸣,宋世达,钱美霞,肖铭堃,王克鸿..电弧增材制造2319铝合金的动态力学性能[J].电焊机,2025,55(4):1-7,7.基金项目
中央高校基本科研业务费专项资金资助(30923011008) （30923011008）
