电焊机2024，Vol.54Issue(12)：8-15,8.DOI:10.7512/j.issn.1001-2303.2024.12.02
高镁铝合金焊接接头软化机制研究及软化模型的建立
Study on Softening Mechanism and Establishment of Softening Model of Welding Joint of High Magnesium Aluminum Alloy
摘要
Abstract
In order to study the softening mechanism of high magnesium aluminum alloy welded joints and establish their weld-ing softening model,through microhardness testing and microscopic characterization,it is revealed that the softening mainly originates from the weakening of solid solution strengthening and dispersion strengthening.As the peak welding temperature increases,the Mg element dissolves in the grains,leading to a decrease in grain distortion and a decline in the ability to hinder lattice dislocation movement,thereby weakening the effect of solid solution strengthening.At high temperatures,the Mg element evaporates from the Al matrix and segregates at the grain boundaries,forming Mg-rich phases,which reduces the effect of dis-persion strengthening.Based on the hardness changes and the peak temperature during the welding process,a softening model that varies with the peak welding temperature was established,and its accuracy was verified through finite element calculations.关键词
高镁铝合金/软化机制/固溶强化/弥散强化/软化模型Key words
high-magnesium aluminum alloy/softening mechanism/softening model/solid solution strengthening/disper-sion strengthening分类
矿业与冶金引用本文复制引用
胡铭汇,赖少波,郑文健,冯道臣,闫德俊,王宇,王文军,俞臻,杨建国..高镁铝合金焊接接头软化机制研究及软化模型的建立[J].电焊机,2024,54(12):8-15,8.基金项目
国家自然科学基金项目(52375391) （52375391）
浙江省"尖兵""领雁"研发攻关计划项目(2023C01244) （2023C01244）
