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Affiliation of Author(s):材料科学与技术学院

Journal:JOURNAL OF MANUFACTURING PROCESSES

Key Words:Disk laser beam welding Welding parameters 2A14-T6 Microstructure Mechanical properties

Abstract:Disk laser beam welding technique is used to fabricate 2-mm 2A14-T6 aluminum alloy plates under different welding parameters. Effects of welding parameters on microstructures and mechanical properties of the weld are investigated. Grain size and porosity ratio in the disk laser welds firstly decrease, then increase with the increase of the heat input. Hardness at the fusion line and in fusion zone, tensile strength and elongation firstly increases, then decreases with the increasing heat input. When laser power is 2500W, welding velocity is 2.0 m/min and heat input is 75 kJ/m, the finest microstructures, the minimum porosity ratio, the highest hardness and the maximum tensile strength are obtained. The fracture type in all samples is defined as a ductile fracture, and the maximum tensile strength reaches up to 261.7 MPa, about 61.2% of that of the base metal. (C) 2017 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.

ISSN No.:1526-6125

Translation or Not:no

Date of Publication:2018-01-01

Co-author:Wang,Lei,Zhao, Wenyong,Xiaohong Zhan,She, Lvbo

Correspondence Author:Wei Yanhong