Analysis of intermetallic layer in dissimilar TIG welding-brazing butt joint of aluminium alloy to stainless steel

被引：73
作者：
Song, J. L. [1 ]
Lin, S. B. [1 ]
Yang, C. L. [1 ]
Fan, C. L. [1 ]
Ma, G. C. [1 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding Prod Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2010年 / 15卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Aluminium-steel hybrid joint; TIG welding-brazing; Intermetallic layer; Phase identification; Mechanical properties; AL-SI; FE; MICROSTRUCTURE; STABILITY; BEHAVIOR; ELEMENTS; PHASES;
D O I：
10.1179/136217110X12665048207610
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Intermetallic layer of dissimilar tungsten inert gas welding-brazing butt joint of aluminium alloy/stainless steel has been studied. A visible unequal thickness intermetallic layer has formed in welded seam/steel interface, and the thickness of the whole layer is <10 mu m. The interface with Al-12Si filler metal consists of iota(5)-Al8Fe2Si layer in welded seam side and theta-(Al,Si)(13)Fe-4 layer in steel side with the hardness values of 1025 and 835 HV respectively, while the interface with Al-6Cu filler metal consists of theta-Al-13(Fe,Cu)(4) layer with the hardness of 645 HV. The average tensile strength of the joint with Al-12Si filler metal is 100-120 MPa, and the fracture occurs at theta-(Al,Si)(13)Fe-4 layer, while the joint with Al-6% Cu filler metal presents high crack resistance with tensile strength of 155-175 MPa, which reaches more than 50% of aluminium base metal strength.
引用
收藏
页码：213 / 218
页数：6
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