ZHANG M,XU Y L,ZHANG C. Effects of caliber rolling on microstructure and behavior of AZ91D alloys with Y addition[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 551-1 556.
ZHANG M,XU Y L,ZHANG C. Effects of caliber rolling on microstructure and behavior of AZ91D alloys with Y addition[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 551-1 556.DOI: 10.15980/j.tzzz.T20250401.
Effects of Caliber Rolling on Microstructure and Behavior of AZ91D Alloys With Y Addition
AZ91D alloy with 0.5% (mass fraction) yttrium addition was successfully prepared using various caliber rolling processes, and the microstructure evolution, mechanical properties, and corrosion resistance were comparatively investigated. The results reveal that the grain is significantly refined after trace yttrium addition combined with caliber rolling, and specimens subjected to high-temperature and low-speed rolling exhibit desirable mechanical properties, where the yield strength, tensile strength and elongation are 343 MPa,421 MPa, and 6.9%, respectively. The enhancement in mechanical properties is attributed to synergy of melt purification by Y, grain refinement, solid solution, and formation of intermetallic compounds. However, the as-rolled alloy presents poor corrosion resistance, which arises from the galvanic corrosion caused by precipitation of
β
phase during deformation, while defects such as dislocation accumulation resulting from caliber rolling deformation also enhance the corrosion susceptibility.
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