Characteristics of AlSi11-AM60 bimetallic joints produced by diffusion bonding

5th International Conference Recent Trends in Structural Materials

Mola, R.^1 ; Cielik, M.^1 ; Odo, K.^1

Kielce University of Technology, Faculty of Mechatronics and Mechanical Engineering, Al. Tysiaclecia Pastwa Polskiego 7, Kielce

25-314, Poland^1

关键词: AM60 alloys;    Bimetallic joints;    Bonding zone;    Chemical compositions;    Energy dispersive x ray microanalysis;    Heating temperatures;    Intermetallic phasis;    Microhardness measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/461/1/012058/pdf
DOI  :  10.1088/1757-899X/461/1/012058

来源: IOP

【 摘 要 】

This paper demonstrates that the diffusion bonding method can be used to join AlSi11 alloy to AM60 alloy. The micro structure of the bonding zone in such joints was examined using optical and scanning electron microscopy. Its chemical composition was determined through energy dispersive X-ray microanalysis. The experimental results show that the microstructure of the bonding zone is dependent on the parameters of the diffusion bonding process. In an AlSi11-AM60 bimetallic joint fabricated at 420 °C, the bonding zone had a thickness of about 50 μm and it was composed of Mg-Al intermetallic phases with irregularly distributed Mg2Si phase areas. When the heating temperature was 440 °C, the bonding zone was about 150 μm thick. Mg2Si was the predominant phase and it was distributed more regularly over the Mg-Al phase matrix. The microhardness measurements of this joint showed that the bonding zone containing hard phases had much higher hardness than either of the alloys joined.