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

页码：149 / 154

页数：6

共 24 条

[1] Coarsening resistance at 400 °C of precipitation-strengthened Al-Zr-Sc-Er alloys [J].

Booth-Morrison, Christopher ;

Dunand, David C. ;

Seidman, David N. .

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 [J].

Dang Jing-zhi ;

Huang Yu-feng ;

Cheng Jun .

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2009, 19 (03) :540-544

[3] New Al-Mg-Sc alloys [J].

Filatov, YA ;

Yelagin, VI ;

Zakharov, VV .

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 [J].

He Zhen-bo ;

Peng Yong-yi ;

Yin Zhi-min ;

Lei Xue-feng .

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2011, 21 (08) :1685-1691

[5] Formation of precipitates and recrystallization resistance in Al-Sc-Zr alloys [J].

Jia Zhi-hong ;

Royset, Jostein ;

Solberg, Jan Ketil ;

Liu Qing .

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 [J].

Kendig, KL ;

Miracle, DB .

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 [J].

Kumar, T. Senthil ;

Balasubramanian, V. ;

Sanavullah, M. Y. .

MATERIALS & DESIGN, 2007, 28 (07) :2080-2092

[9] Investigation of the microstructure and properties of a friction stir welded Al-Mg-Sc alloy [J].

Lapasset, G ;

Girard, Y ;

Campagnac, MH ;

Boivin, D .

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 [J].

Lathabai, S ;

Lloyd, PG .

ACTA MATERIALIA, 2002, 50 (17) :4275-4292

← 1 2 3 →