Strain hardening of as-extruded Mg-xZn (x?=?1, 2, 3 and 4 wt%) alloys |
| |
基金项目: | This work was financially supported by the National Key R&D Program of China;the National Natural Science Foundation of China;the Fundamental Research Funds for the Central Universities |
| |
摘 要: | The influence of Zn on the strain hardening of as-extruded Mg-x Zn(x = 1, 2, 3 and 4 wt%) magnesium alloys was investigated using uniaxial tensile tests at 10~(-3)s~(-1) at room temperature. The strain hardening rate,the strain hardening exponent and the hardening capacity were obtained from true plastic stress-strain curves. There were almost no second phases in the as-extruded Mg-Zn magnesium alloys. Average grain sizes of the four as-extruded alloys were about 17.8 μm. With increasing Zn content from 1 to 4 wt%, the strain hardening rate increased from 2850 MPa to 6810 MPa at(б-б_(0.2)) = 60 MPa, the strain hardening exponent n increased from 0.160 to 0.203, and the hardening capacity, Hc increased from 1.17 to 2.34.The difference in strain hardening response of these Mg-Zn alloys might be mainly caused by weaker basal texture and more solute atoms in the α-Mg matrix with higher Zn content.
|
收稿时间: | 8 March 2018 |
本文献已被 CNKI 万方数据 ScienceDirect 等数据库收录! |
|