Achieving high strength and high ductility in magnesium alloy using hard-plate rolling (HPR) process

• DOI: 10.1038/srep17100
• Publication Date: 2015-11-25T09:52:30Z
• Authors: Hui–Yuan Wang; Zhao–Peng Yu; Lei Zhang; Chun–Guo Liu; Min Zha; Cheng Wang; Qi–Chuan Jiang
• Keywords: Ductility (Earth science); Texture (cosmology); Work hardening; Hardening (computing)

Abstract Magnesium alloys are highly desirable for a wide range of lightweight structural components. However, rolling Mg can be difficult due to their poor plasticity and the strong texture yielded from often results in plate forming ability, which limits further engineering applications. Here we report new hard-plate (HPR) route achieves large reduction during single pass. The Mg-9Al-1Zn (AZ91) plates processed by HPR consist coarse grains 30–60 μm, exhibiting typical basal texture, fine 1–5 μm ultrafine (sub) 200–500 nm, both latter two having weakened texture. More importantly, was efficient gaining simultaneous high strength uniform ductility, i.e., ~371 MPa ~23%, respectively. superior properties should mainly attributed cooperation effect multimodal grain structure where former facilitates work hardening while promotes slip. methodology is facile effective avoid cracking that prone occur conventional processes. This strategy applicable hard-to-deform materials like thus has promising prospect industrial application.