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An Mg–3Al–1Zn alloy with fully recrystallized microstructure and a mean grain size of 1μm has been produced by high-ratio differential speed rolling under the condition that the cold sheet is subjected to rolling with hot rolls preheated to 473K, resulting in a total thickness reduction of 68% after two-step rolling. No surface or internal cracks were developed. The microstructure was homogenous along...
Ultrafine grained (UFG) 1 % Ca-AZ80 (1CaAZ80) alloy in sheet form could be fabricated by means of high-ratio differential speed rolling (HRDSR) technique. During the rolling, the grain size was markedly reduced from 11.5 to 0.8μm, and Al 2 Ca particles were broken up to smaller ones and dispersed into the matrix. The UFG 1CaAZ80 alloy exhibited a high strength (yield stress=340MPa) at room...
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