Effects of Ultrasonic Treatment on Microstructure and Properties of AZ31 Magnesium Alloy Welded Joint by Laser Welding

Shen Yanjin; Liu Haiyu; Li Xuefeng; Chen Xueyong

doi:10.15980/j.tzzz.2016.04.005

Views : 0 下载量: 183 CSCD: 6

Export
Share
Collection
Album

Effects of Ultrasonic Treatment on Microstructure and Properties of AZ31 Magnesium Alloy Welded Joint by Laser Welding
Vol. 36, Issue 4, Pages: 353-356(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.04.005

扫描看全文

[1]沈言锦,刘海渔,李雪丰,陈学永.超声对AZ31合金激光焊接头组织与性能的影响[J].特种铸造及有色合金,2016,36(04):353-356.

Shen Yanjin, Liu Haiyu, Li Xuefeng, et al. Effects of Ultrasonic Treatment on Microstructure and Properties of AZ31 Magnesium Alloy Welded Joint by Laser Welding. [J]. Special Casting & Nonferrous Alloys 36(4):353-356(2016)
[1]沈言锦,刘海渔,李雪丰,陈学永.超声对AZ31合金激光焊接头组织与性能的影响[J].特种铸造及有色合金,2016,36(04):353-356. DOI： 10.15980/j.tzzz.2016.04.005.

Shen Yanjin, Liu Haiyu, Li Xuefeng, et al. Effects of Ultrasonic Treatment on Microstructure and Properties of AZ31 Magnesium Alloy Welded Joint by Laser Welding. [J]. Special Casting & Nonferrous Alloys 36(4):353-356(2016) DOI： 10.15980/j.tzzz.2016.04.005.

摘要

采用激光焊接方法对AZ31镁合金薄板进行焊接

借助金相显微镜、布氏硬度计、拉伸试验机等手段研究超声波功率对焊接接头组织与性能的影响。同时利用图像分析软件Image-Pro Plus测量焊缝平均晶粒尺寸。结果表明

超声波功率对接头组织与性能影响明显。随着超声波功率的增加

空化效应以及声流作用越来越明显

平均晶粒尺寸由54μm减小到24μm

接头宏观硬度与抗拉强度均呈先增加后减小的变化。其中当超声波功率增加至1 200W时

平均晶粒尺寸最小

其最小值仅为24μm

而宏观硬度（HB）与抗拉强度均达到最大值

分别为56和286.54 MPa。

Abstract

AZ31magnesium alloy sheets were welded by laser welding.Effects of ultrasonic power on the microstructure and properties of the welded joint were investigated by optical microscopy

Brinell hardness tester and tensile testing machine.In addition

the average grain size of the welding joint was calculated by the Image-Pro Plus software.The results show that effects of ultrasonic power on microstructure and properties of the coating exhibit very obvious.With increasing in ultrasonic power

the average grain size is decreased from 54μm to 24μm as a result of obvious cavitation effect and acoustic stream.The macro-hardness and tensile strength of the welding joint are increased at first and then decreased.When the ultrasonic power is 1 200 W

the average grain size reaches 24μm.Meanwhile

the macrohardness and tensile strength of the joint reach 56 HB and 286.54 MPa

respectively.