Study on microstructure and mechanical properties of Al-Mg-Mn-Er alloy joints welded by TIG and laser beam

被引：34
作者：
Yang Dongxia [1 ]
Li Xiaoyan [1 ]
He Dingyong [1 ]
Hui, Huang [1 ]
Liang, Zhang [1 ]
机构：
[1] Beijing Univ Technol, Dept Mat Sci & Engn, Beijing 100124, Peoples R China
来源：
MATERIALS & DESIGN | 2012年 / 40卷
基金：
国家高技术研究发展计划(863计划);
关键词：
Welding; Mechanical; Microstructure; ALUMINUM-ALLOYS; TENSILE PROPERTIES; WELDABILITY; ZR; SCANDIUM; HARDNESS;
D O I：
10.1016/j.matdes.2012.03.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al-4.7Mg-0.7Mn-0.3Er alloy plates were welded by laser beam welding (LBW) and tungsten inert gas (TIG). Mechanical properties and microstructures of both welded joints were analyzed. The results showed that the tensile strength of LBW joint was 315 MPa, which was approximately 10% higher than that of TIG welded joint. This was attributed to the fine grains, dispersed primary Al3Er phase and low Mg evaporation in LBW weld. Equiaxed grains with average size of 30 mu m were obtained in the fusion zone, which were much smaller than that of 90 mu m in the fusion zone of TIG joint, due to the low heat input during LBW process. Moreover, finer primary Al3Er particles were uniformly distributed in the LBW joints, which resulted in a substantial increase of nucleation rate in LBW welds. In addition, it was also found that Mg concentrations in the fusion zones, in both TIG and LBW joints, were lower than that of the base one tested by EPMA. The burning loss rates of Mg in TIG and LBW joints were 36% and 22%, respectively. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：117 / 123
页数：7
相关论文
共 33 条
  • [1] Effect of pre/post T6 heat treatment on the mechanical properties of laser welded SSM cast A356 aluminium alloy
    Akhter, R.
    Ivanchev, L.
    Burger, H. P.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 447 (1-2): : 192 - 196
  • [2] ASTM, 2010, B55710 ASTM
  • [3] Tensile properties of friction stir welded joints of 2024 aluminum alloys in different heat-treated-state
    Aydin, Hakan
    Bayram, Ali
    Uguz, Agah
    Akay, Kemal Sertan
    [J]. MATERIALS & DESIGN, 2009, 30 (06) : 2211 - 2221
  • [4] Microstructures and fatigue fracture behavior of an Al-Cu-Mg-Ag alloy with addition of rare earth Er
    Bai, Song
    Liu, Zhiyi
    Lia, Yuntao
    Hou, Yanhui
    Chen, Xu
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (7-8): : 1806 - 1814
  • [5] Research and progress in laser welding of wrought aluminum alloys. II. Metallurgical microstructures, defects, and mechanical properties
    Cao, X
    Wallace, W
    Immarigeon, JP
    Poon, C
    [J]. MATERIALS AND MANUFACTURING PROCESSES, 2003, 18 (01) : 23 - 49
  • [6] ON THE WELDABILITY, COMPOSITION, AND HARDNESS OF PULSED AND CONTINUOUS ND-YAG LASER WELDS IN ALUMINUM-ALLOYS 6061, 5456, AND 5086
    CIESLAK, MJ
    FUERSCHBACH, PW
    [J]. METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1988, 19 (02): : 319 - 329
  • [7] Dearden G., 2002, INT C APPL LAS EL, DOI [10.2351/1.5065620, DOI 10.2351/1.5065620]
  • [8] Development of a theory for alloying element losses during laser beam welding
    Dilthey, U
    Goumeniouk, A
    Lopota, V
    Turichin, G
    Valdaitseva, E
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2001, 34 (01) : 81 - 86
  • [9] Guitterez LA, 1996, WELD J, V75, pS115
  • [10] Effects of homogenization on microstructures and properties of a new type Al-Mg-Mn-Zr-Ti-Er alloy
    He, L. Z.
    Li, X. H.
    Liu, X. T.
    Wang, X. J.
    Zhang, H. T.
    Cui, J. Z.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (29-30): : 7510 - 7518
1234