Friction stir welding of aluminium to magnesium: A critical review

Abstract

Aluminium/magnesium hybrid structure has been paid increasing attention recently due to its excellent lightweight. However, aluminium/magnesium is easy to form pores, cracks, and massive intermetallic compounds when fusion welding is used. Friction stir welding is as solid-state method, which avoids the above-mentioned problems caused by fusion welding. This article systematically reviews recent progress in friction stir welding of aluminium/magnesium from temperature field, metal flow and weld composition. Moreover, the effects of control parameters on the temperature field, metal flow and weld composition are discussed objectively, respectively. Finally, this work puts forward some problems that need to be solved urgently in the future based on summarising the recent progress of friction stir welding of aluminium/magnesium.

The Effect of Tool Rotation Speed on the Formation of Eutectic Structure during Friction Stir Welding of Aluminum to Magnesium

“…Considering the drawbacks of Al, namely low molten viscosity, high reflectivity, and inherent oxide layer formation, traditional welding processing resulted in hot cracking, poor joining, and potential defects [7]. Correspondingly, the formation of intermetallic compounds, brittle compounds, pores, and solidification cracks in conventional approaches, e.g., arc welding and fusion welding processes, was observed [15]. Compared to others, to overcome these shortcomings, friction stir welding (FSW) has been suggested because of its processing uniqueness and cost-efficient technique [16,17].…”

The simulation of microstructural evolutions in friction stir additive manufacturing

“…Friction Stir Welding (FSW) has been invented for more than three decades and quickly applied to the joining of many materials, [1][2][3][4][5] for example, aluminum alloys, [6][7][8][9][10][11] magnesium alloys, [11][12][13] steels, [14][15][16][17] titanium alloys, [18][19][20] and even dissimilar metals. [21][22][23][24][25][26] Based on FSW, different new processing technologies are developed, including friction stir processing, 27 friction stir spot welding, 28,29 friction stir additive manufacturing, [30][31][32] etc.…”