Grain size dependence of yield strength in randomly textured Mg-Al-Zn alloy

Abstract

The randomly textured Mg-Al-Zn alloy processed by electron beam welding typically exhibits clear grain size dependence of yield strength according to the Hall-Petch relationship:σ0.2 = 62 4- 202d-1|/2. The Schmid factor for the basal slip system was deduced to be around 0.031 in the randomly textured Mg alloys. The σ0 in the Hall-Petch equation was theoretically calculated to be ∼ 65 MPa, which is reasonably consistent with the experimental data of ∼ MPa. © 2007 The Japan Institute of Metals.