标题：
Influence of hydrogen embrittlement on impact property and microstructural characteristics in aluminum alloy weld
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所属单位：
材料科学与技术学院
发表刊物：
Vacuum
摘要：
As a light-weighting structural material, aluminum alloy is being applied in the automobile and high-speed train, the property of which however is affected by the content of hydrogen, and much importance has been attached to the impact property of aluminum alloy. In this study, hydrogen was determined in ER5183 welding wire and afterwards the effect of hydrogen content on the impact property of Al–Mg MIG weld is investigated to clarify the mechanism of hydrogen action which provided a reasonable control range of hydrogen content in aluminum welding wire. The results show that the impact toughness of the weld is decreased with the increasing hydrogen content. In addition, the decohesion of impurities from the matrix and the formation of porosity are also observed in the weld. The morphology of impact fracture appears facet and porosity due to the "hydrogen-enhanced localized plasticity" effect on plasticity. Considering the good impact property as well as the fine microstructure of the weld, hydrogen content of the ER5183 welding wires should be controlled below 0.18 μg/g. © 2019 Elsevier Ltd
ISSN号：
0042-207X
是否译文：
否
发表时间：
2020-02-01
合写作者：
Han, Yilong,Xue, Songbai,Lin, Lihao,Lin, Zhongqiang,Pei, Yinyin,Sun, Huawei
通讯作者：
傅仁利
发表时间：
2020-02-01
学位：工学博士学位
职称：教授
所在单位：材料科学与技术学院