傅仁利   

Professor

MORE>
Language:English

Paper Publications

Title of Paper:Influence of hydrogen embrittlement on impact property and microstructural characteristics in aluminum alloy weld

Hits:

Affiliation of Author(s):材料科学与技术学院

Journal:Vacuum

Abstract: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 No.:0042-207X

Translation or Not:no

Date of Publication:2020-02-01

Co-author:Han, Yilong,Xue, Songbai,Lin, Lihao,Lin, Zhongqiang,Pei, Yinyin,Sun, Huawei

Correspondence Author:frl

Copyright©2018- Nanjing University of Aeronautics and Astronautics·Informationization Department(Informationization Technology Center)
Click:    MOBILE Version

Open time:..

The Last Update Time: ..