Microstructural characterization and mechanical properties of diffusion-brazed AZ91C magnesium alloy to 316L stainless steel

被引:3
作者
Ataei, M. [1 ]
Shamsipur, A. [1 ]
Mirsalehi, S. E. [1 ]
机构
[1] Amirkabir Univ Technol, Dept Min & Met Engn, Tehran Polytech, 424 Hafez Ave, Tehran 158754413, Iran
来源
KOVOVE MATERIALY-METALLIC MATERIALS | 2019年 / 57卷 / 05期
关键词
diffusion brazing; AZ91C/316L joints; mechanical characteristics; elevated temperatures; microhardness; shear strength; TRANSIENT LIQUID-PHASE; AZ31B MAGNESIUM; GAP SIZE; RESISTANCE;
D O I
10.4149/km_2019_5_299
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Dissimilar transient liquid phase (TLP) bonding of AZ91C magnesium alloy to 316L stainless steel was carried out using a pure copper filler metal. The bonding process was conducted in two stages where TLP bonding of 316L to Cu interlayer was first performed and then followed by bonding AZ91C to the other side of the copper interlayer. It was indicated that the temperature rise enhanced the inter-diffusion of elements at the AZ91C/Cu interface and encouraged the formation of hard intermetallic Mg2Cu compound. Refinement of Cu grains was observed and attributed to the induced strain from the fixture. This phenomenon assisted the enhancement of mechanical properties of the joints. By increasing the temperature from 495 to 530 degrees C, the shear strength revealed an upsurge of more than 20 %. The presence of Mg2Cu was detected as the main contributor to the increased shear strength and microhardness at elevated temperatures.
引用
收藏
页码:299 / 306
页数:8
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