固溶及时效温度对激光粉末床熔融WE43镁合金组织与力学性能的影响
Effect of solution and aging temperature on microstructure and mechanical properties of WE43 Mg alloy fabricated by laser powder bed fusion
王亮 1门正兴 1陈雯 2吉辰 2廖若冰 2马亚鑫 1王秋林 1汪晓龙 3朱亮 2李坤4
作者信息
- 1. 成都航空职业技术学院,四川成都 610100
- 2. 重庆大学高端装备机械传动全国重点实验室,重庆 400044;高性能结构增材制造重庆市重点实验室,重庆 400044
- 3. 潍柴动力空气净化科技有限公司,山东潍坊 261061
- 4. 重庆大学高端装备机械传动全国重点实验室,重庆 400044;高性能结构增材制造重庆市重点实验室,重庆 400044;海亮集团有限公司,浙江诸暨 310051;南京航空航天大学材料科学与技术学院,江苏南京 211106
- 折叠
摘要
激光粉末床熔融(LPBF)制备WE43镁合金材料,虽然可以快速成形复杂形状零件,但不均匀的残余应力和孔隙率,限制了 LPBF镁合金的力学性能.后期热处理是解决该问题的有效方法之一.研究了两种热处理工艺对LPBF制备的WE43镁合金力学性能和微观组织的影响.结果表明:经425和525℃固溶和200和250 ℃时效处理后,六方晶粒织构的基面开始趋于平行沉积平面,取向开始显现.随着固溶与时效温度的升高,合金的晶粒开始重组、尺寸增大,室温抗拉强度降低,200 ℃原位拉伸时的抗拉强度更低,塑性逐渐增强.合金的室温拉伸断口形貌呈现脆性与韧性混合断裂特征,200℃原位拉伸断口呈现韧性断裂特征.
Abstract
The preparation of WE43 magnesium alloy material by laser powder bed fusion(LPBF)can rapidly form complex shaped parts,but the uneven residual stress and porosity limit the mechanical properties of LPBF magnesium alloys.Post-heat treatment is one of the effective methods to solve this problem.The effect of two heat treatment processes on the mechanical properties and microstructure of the WE43 magnesium alloy prepared by LPBF was studied.The results show that after solution treatment at 425 ℃ and 525 ℃ and aging at 200 ℃ and 250 ℃,the basal plane of hexagonal grain texture begins to trend towards parallel deposition planes,and the orientation begins to appear.With the increase of solution and aging temperature,the grains of the alloy begin to reorganize and their sizes increase,the tensile strength at room temperature decreases,the tensile strength during in situ tensile at 200 ℃ is even lower,and the plasticity gradually increases.The room temperature tensile fracture morphology of the alloy exhibits a mixture of brittle and ductile fracture characteristics,while the in-situ tensile fracture at 200 ℃ shows ductile fracture characteristics.
关键词
激光粉末床熔融/固溶时效/织构/力学性能Key words
laser powder bed fusion/solution aging/texture/mechanical property引用本文复制引用
基金项目
国家自然科学基金(52201105)
重庆市留学回国人员创业创新支持计划项目(cx2023061)
四川省自然科学基金项目(2023NSFSC0407)
出版年
2024
NETL
NSTL
万方数据