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Materials 2014, 7(2), 1173-1187; doi:10.3390/ma7021173
Article

Study on Mg/Al Weld Seam Based on Zn–Mg–Al Ternary Alloy

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Received: 26 December 2013; in revised form: 29 January 2014 / Accepted: 6 February 2014 / Published: 13 February 2014
(This article belongs to the Special Issue Light Alloys and Their Applications)
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Abstract: Based on the idea of alloying welding seams, a series of Zn–xAl filler metals was calculated and designed for joining Mg/Al dissimilar metals by gas tungsten arc (GTA) welding. An infrared thermography system was used to measure the temperature of the welding pool during the welding process to investigate the solidification process. It was found that the mechanical properties of the welded joints were improved with the increasing of the Al content in the Zn–xAl filler metals, and when Zn–30Al was used as the filler metal, the ultimate tensile strength could reach a maximum of 120 MPa. The reason for the average tensile strength of the joint increasing was that the weak zone of the joint using Zn–30Al filler metal was generated primarily by α-Al instead of MgZn2. When Zn–40Al was used as the filler metal, a new transition zone, about 20 μm-wide, appeared in the edge of the fusion zone near the Mg base metal. Due to the transition zones consisting of MgZn2- and Al-based solid solution, the mechanical property of the joints was deteriorated.
Keywords: Mg/Al welding; multicomponent alloy; intermetallics; microstructure evolution Mg/Al welding; multicomponent alloy; intermetallics; microstructure evolution
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Liu, L.; Liu, F.; Zhu, M. Study on Mg/Al Weld Seam Based on Zn–Mg–Al Ternary Alloy. Materials 2014, 7, 1173-1187.

AMA Style

Liu L, Liu F, Zhu M. Study on Mg/Al Weld Seam Based on Zn–Mg–Al Ternary Alloy. Materials. 2014; 7(2):1173-1187.

Chicago/Turabian Style

Liu, Liming; Liu, Fei; Zhu, Meili. 2014. "Study on Mg/Al Weld Seam Based on Zn–Mg–Al Ternary Alloy." Materials 7, no. 2: 1173-1187.


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