Effect of Initial Grain Size and Strain Path on Grain Refinement in Magnesium Alloy AZ31

Xu Yue Yang; Hiromi Miura; Taku Sakai

doi:10.4028/www.scientific.net/MSF.539-543.1632

Paper Titles

Observations on the Thermal Response and Mold Filling Behavior of an AZ91E Magnesium Alloy Cast by the Lost Foam Casting Process
p.1609

Enhancement of Press Formability of Rolled Mg Alloy Sheet by Using Cross Rolling Processes
p.1615

New Phases in the Mg-Al-Sr System
p.1620

Cyclic Deformation Behaviour and Potential Automobile Application of Magnesium Die Casting Alloys AZ91 and AM50
p.1626

Effect of Initial Grain Size and Strain Path on Grain Refinement in Magnesium Alloy AZ31
p.1632

Mechanical Joining of Magnesium Components by Means of Inductive Heating - Realization and Capability
p.1638

Selected Aspects of Semisolid Forming Magnesium Alloys
p.1644

Properties of AZ31 and AZ91 Sheets Made by Twin Roll Casting
p.1650

Superior Corrosion Resistance and Mechanical Properties of a Mg Alloy Recycled by Solid-State Process
p.1656

HomeMaterials Science ForumMaterials Science Forum Vols. 539-543Effect of Initial Grain Size and Strain Path on...

Effect of Initial Grain Size and Strain Path on Grain Refinement in Magnesium Alloy AZ31

Abstract:

Grain refinement taking place in a magnesium alloy AZ31 was studied in a single- and multi-directional compression at a temperature of 573K. The structural changes observed by SEM/EBSD analysis can be characterized by the evolution of many mutually crossing kink bands at low strains, continuous increase in their number and misorientation angle in moderate strain and finally full formation of a fine-grained structure in high strain. The characteristics of new grain evolution process are sensitively affected by initial grain size (D0) and strain path. New grains are developed faster with decrease in D0. Multi-directional compression accelerates the evolution of fine grains and the improvement of plastic workability. The mechanism of new grain formation is discussed in detail.