标题：
Microstructural characterization and mechanical performance of Al?Cu?Li alloy electron beam welded joint
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所属单位：
材料科学与技术学院
发表刊物：
Aerosp Sci Technol
摘要：
Al–Cu–Li alloy with the thickness of 4 mm is welded by electron beam welding (EBW). Microstructure and mechanical properties of welded joint are systematically investigated. The formation mechanism of weld porosity is fully discussed. Orthogonal experiment results show that welding parameters have great effect on the generation of weld gas pore, and welding speed is the main factor affecting the porosity, followed by electron beam scanning mode, electron beam current is the minimal one. Microstructure analysis demonstrates that weldment is mainly equiaxed grains, and some dendrites exist too. Mechanical properties of welded joints indicate that, under the following welding parameters, electron beam current 13 mA, welding speed 600 mm/min, circular electron beam scanning, a welded joint with good mechanical performance can be obtained. Tensile strength of welded joint is 368.4 MPa, which is about 68% of that of the base metal (BM). SEM analysis shows that there are many fine dimples distributed on the fracture surface of welded joint, and it obviously presents the characteristic of ductile fracture. © 2018 Elsevier Masson SAS
ISSN号：
1270-9638
是否译文：
否
发表时间：
2018-11-01
合写作者：
Zhao, Li,王少刚,Jin, Yang,陈元恩
通讯作者：
赵玲,王少刚
发表时间：
2018-11-01
学位：哲学博士学位
职称：教授
所在单位：马克思主义学院