Microstructures and mechanical properties of Gas Tungsten Arc Welded joints of new Al-Mg-Sc and Al-Mg-Er alloy plates

被引：20
作者：
Fu, Le [1 ,2 ]
Peng, Yongyi [1 ]
Huang, Jiwu [2 ]
Deng, Ying [2 ]
Yin, Zhimin [2 ]
机构：
[1] Cent S Univ, Sch Phys & Elect, Key Lab Super Microstruct & Ultrafast Proc Adv Ma, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 620卷
关键词：
Al-Mg-Sc; Al-Mg-Er; Welding; Microstructure; Mechanical properties; INERT-GAS; ZR; TIG; RESISTANCE;
D O I：
10.1016/j.msea.2014.10.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of microalloy element Sc and Er on Gas Tungsten Arc Welded (GTAW) joints of Al-Mg alloy was studied by comparative method. The microstructures and mechanical properties of Al-Mg-Sc and Al-Mg-Er alloy welded joint were examined by microhardness measurement, tensile test, optical microscopy and transmission electron microscope. The strength of Al-Mg-Sc welded joint is higher than that of Al-Mg-Er welded joint. The differences of the two welded joints can be attributed to the different thermal stability and the effect of Al-3(Sc1-x,Zr-x) particles and Al-3(Er1-x,Zr-x) particles. Al-3(Sc1-x,Zr-x) particles, which have higher thermal stability, are still coherent with Al matrix in the HAZ, can strongly pin dislocations and subgrain boundaries of the HAZ. There are strain strengthening and precipitation strengthening in the HAZ of Al-Mg-Sc welded joints. Notable coarsening of Al-3(Er1-x,Zr-x) particles and recrystallization in the HAZ of Al-Mg-Er welded joint lead to the reduction and disappearance of strain strengthening and precipitation strengthening. (C) 2014 Elsevier B.V. All rights reserved.,
引用
收藏
页码：149 / 154
页数：6
相关论文
共 24 条
  • [1] Coarsening resistance at 400 °C of precipitation-strengthened Al-Zr-Sc-Er alloys
    Booth-Morrison, Christopher
    Dunand, David C.
    Seidman, David N.
    [J]. ACTA MATERIALIA, 2011, 59 (18) : 7029 - 7042
  • [2] Effect of Sc and Zr on microstructures and mechanical properties of as-cast Al-Mg-Si-Mn alloys
    Dang Jing-zhi
    Huang Yu-feng
    Cheng Jun
    [J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2009, 19 (03) : 540 - 544
  • [3] New Al-Mg-Sc alloys
    Filatov, YA
    Yelagin, VI
    Zakharov, VV
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 280 (01): : 97 - 101
  • [4] Comparison of FSW and TIG welded joints in Al-Mg-Mn-Sc-Zr alloy plates
    He Zhen-bo
    Peng Yong-yi
    Yin Zhi-min
    Lei Xue-feng
    [J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2011, 21 (08) : 1685 - 1691
  • [5] Formation of precipitates and recrystallization resistance in Al-Sc-Zr alloys
    Jia Zhi-hong
    Royset, Jostein
    Solberg, Jan Ketil
    Liu Qing
    [J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2012, 22 (08) : 1866 - 1871
  • [6] Kamesky R.A., 2006, SCRIPTA MATER, V55, P437
  • [7] Strengthening mechanisms of an Al-Mg-Sc-Zr alloy
    Kendig, KL
    Miracle, DB
    [J]. ACTA MATERIALIA, 2002, 50 (16) : 4165 - 4175
  • [8] Influences of pulsed current tungsten inert gas welding parameters on the tensile properties of AA 6061 aluminium alloy
    Kumar, T. Senthil
    Balasubramanian, V.
    Sanavullah, M. Y.
    [J]. MATERIALS & DESIGN, 2007, 28 (07) : 2080 - 2092
  • [9] Investigation of the microstructure and properties of a friction stir welded Al-Mg-Sc alloy
    Lapasset, G
    Girard, Y
    Campagnac, MH
    Boivin, D
    [J]. THERMEC'2003, PTS 1-5, 2003, 426-4 : 2987 - 2992
  • [10] The effect of scandium on the microstructure, mechanical properties and weldability of a cast Al-Mg alloy
    Lathabai, S
    Lloyd, PG
    [J]. ACTA MATERIALIA, 2002, 50 (17) : 4275 - 4292
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