Against the background of the lightweight industry, the development of new aluminum alloys with high specific strength and low production cost is one of the main goals in modern industry. However, hot tearing is one of the most serious and irreparable defects in the production of thin-wall, complex and large castings of aluminum alloy, which limits the application of aluminum alloys [1][2][3] . Hot tearing is mainly attributed to insufficient feeding during solidification and the large-size thermal stress and strain at the end of solidification [4] . The fracture morphology shows that hot tearing usually occurs in the intergranular area, and the residual liquid or separated solid dendrite bridge is observed at the crack [4][5][6] .
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