Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635998 | Transactions of Nonferrous Metals Society of China | 2015 | 7 Pages |
Abstract
Pre-compression and heat treatment were performed on an extruded AZ31 Mg alloy, and their effects on subsequent deformation behavior were investigated. The results show that at low temperature annealing (170 °C for 4 h), the extruded samples with and without annealing exhibit a nearly equivalent yield stress (â¼148 MPa) because their microstructures are nearly unchanged. However, under the same annealing condition, the yield stress of sample with pre-twinning and subsequent annealing (â¼225 MPa) is higher than that of the pre-twinned one (â¼200 MPa). The former sample presents a hardening effect because the solute atoms segregated on twin boundaries lead to a strengthening effect. The pre-twinned sample annealed at 400 °C for 1 h shows a higher ultimate elongation (â¼28%) than the pre-twinned one (â¼15%), but its yield stress (â¼125 MPa) is much lower than that of the pre-twinned one (â¼200 MPa).
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Hong-bing CHEN, Tian-mo LIU, Li-wei LU, Jie-jun HE, Yan-bo ZHAI,