Intermetallic compound formation at the Interface of Diffusion Bond and Friction Stir Weld of Al/Mg joints

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Mofid Mohammad Ammar; Naeimian Hamid

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Journal: METALLURGICAL ENGINEERING Year:2019 | Volume:22 | Issue:2 (74) Page(s): 135-143

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Title

Intermetallic compound formation at the Interface of Diffusion Bond and Friction Stir Weld of Al/Mg joints

Author(s)

Mofid Mohammad Ammar | Naeimian Hamid | Issue Writer Certificate

Keywords

Friction stir weldQ2

Diffusion bondQ1

Temperature profileQ1

Mg alloyQ1

Interface microstructureQ1

Abstract

Dissimilar joining of Al5083 to MgAZ31 was performed through Friction stir welding (FSW) and Diffusion bonding (DB). A constant tool rotation rate of 400 rpm and travel speed of 50 mm/min was used for FSW. The peak temperature of this specimen was raised to maximum of 435° C at the advancing side of the FS weld. Thermal cycle of the FSW specimen showed a distinct plateau at about 430 ° C, lasting for about 8 s. At the travel speed of 50 mm/min, the distance corresponding to 8 s is about7mm, which is the pin diameter. The presence of the temperature plateau indicates that the temperature at eachthermocouple remained constant as the pin passed it. It further indicates that a eutectic reaction probably occurred, and kept the temperature constant as the pin passed by. The weld had anirregular shaped region in the weld center of DB weld and, having a different microstructure and hardness from the two base materials. The irregular shaped region in DB weld, contained a large volume of intermetallic compound Al12Mg17. The present study suggests that constitutional liquation and solid state diffusion at the interface resulted in the intermetallic compound formation in the weld center.

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APA: Copy

Mofid, Mohammad Ammar, & Naeimian, Hamid. (2019). Intermetallic compound formation at the Interface of Diffusion Bond and Friction Stir Weld of Al/Mg joints. METALLURGICAL ENGINEERING, 22(2 (74) ), 135-143. SID. https://sid.ir/paper/391407/en

Vancouver: Copy

Mofid Mohammad Ammar, Naeimian Hamid. Intermetallic compound formation at the Interface of Diffusion Bond and Friction Stir Weld of Al/Mg joints. METALLURGICAL ENGINEERING[Internet]. 2019;22(2 (74) ):135-143. Available from: https://sid.ir/paper/391407/en

IEEE: Copy

Mohammad Ammar Mofid, and Hamid Naeimian, “Intermetallic compound formation at the Interface of Diffusion Bond and Friction Stir Weld of Al/Mg joints,” METALLURGICAL ENGINEERING, vol. 22, no. 2 (74) , pp. 135–143, 2019, [Online]. Available: https://sid.ir/paper/391407/en

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