异步轧制Mg-3Al-1Zn合金板材的微观组织  

Microstructures of Mg-3Al-1Zn Alloy Sheets Deformed by Differential Speed Rolling

作　　者：丁茹[1] 王伯健[1] 师晓莉[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055

出　　处：《有色金属》2011年第2期19-21,共3页Nonferrous Metals

摘　　要：采用光学显微镜研究变形量为38%和45%的异步轧制Mg-3Al-1Zn合金板材的微观组织。结果表明,经变形量为38%和45%的异步轧制后,板材的平均晶粒尺寸分别由13.6μm细化至2.8μm和3.5μm。可见,异步轧制有利于板材的晶粒细化,但当晶粒细化到一定程度以后,继续增大变形量将很难使晶粒进一步细化。组织细化主要取决于所产生的附加剪切变形和再结晶形核质点的增多。The microstructures of Mg-3Al-1Zn alloy sheets produced by differential speed rolling with the thickness reductions of 38% and 45% are investigated by optical microscopy.The results indicate that the grains are refined by differential speed rolling,but when grains are refined to a content extent,further refinement could not be obtained with the increase of the thickness reduction.Microstructure refinement is mainly depended on the generation of additional shear deformation and the increase of the nucleation particles.

关 键 词：金属材料 异步轧制 镁合金 晶粒细化 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料]