反挤压Zn-Mn二元合金的微观组织与力学性能

Microstructural and mechanical properties of indirectly extruded Zn-Mn binary alloy

采用电子背散射衍射(EBSD)和室温拉伸试验,研究了不同挤压速度对Zn-Mn二元合金的微观组织与力学性能的影响.研究结果表明,挤压态Zn-Mn二元合金发生完全动态再结晶.在相同的Mn质量分数下,随着挤压速度的提高,Zn-Mn二元合金的强度上升、塑性下降,平均晶粒尺寸增加.晶粒尺寸和第二相是影响Zn-0.3Mn和Zn-0.7Mn力学性能的主要因素.在相同的挤压速度下,随着Mn质量分数的增加,第二相尺寸和数量增加,平均晶粒尺寸减小,但Zn-Mn二元合金的强度下降,伸长率显著上升.

The effects of extrusion speed on the microstructure and mechanical properties of Zn-Mn binary alloy were studied by electron backscatter diffraction(EBSD) and tensile test at room temperature. The results show that the as-extruded Zn-Mn binary alloy has complete dynamic recrystallization. At the same Mn content, with the increase of extrusion speed, the strength of Zn-Mn binary alloy increases, the plasticity decreases, and the average grain size increases. Grain size and second phase are the main factors afflicting the mechanical properties of Zn-0.3 Mn and Zn-0.7 Mn. At the same extrusion speed, with the increase of manganese content, the second phase size and number increase, and the average grain size decreases, but the strength of Zn-Mn binary alloy decreases and the elongation increases significantly.