Bimodal grain structure formation and strengthening mechanisms in Mg-Mn-Al-Ca extrusion alloys
Journal of Magnesium and Alloys(2023)
Abstract
•Bimodal structure formed with the small amount of Ca (0.1wt% and 0.5wt%) in Mg-1Mn-0.5Al alloys.•Nanoscale Mg2Ca dynamic precipitated in unDRXed region, leading to the retard of the DRXed behavior and the formation of bimodal structure.•Tensile yield strength increased from 224 MPa in Mg-1Mn-0.5Al to 335 MPa in Mg-1Mn-0.5Al-0.1Ca and 352 MPa in Mg-1Mn-0.5Al-0.5Ca alloys.
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Key words
Magnesium alloys,Extrusion,Dynamic precipitation,Dynamic recrystallization,Bimodal grain structure,Mechanical properties
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