Zn-0.8Cu微管的拉伸应力应变曲线如图4-12所示，由该应力应变曲线可以看出：Zn-0.8Cu微管的屈服强度超过217 MPa，抗拉强度278 MPa，材料屈强比为78%。锌铜合金的弹性区较短，均匀塑性变形区域较短但塑性失稳区长；在该拉伸速率下（e_Lc=0.0067s^-1），出现一定程度的加工硬化，最终断裂伸长率约为22%。

The tensile stress-strain curve of the Zn-0.8Cu microtube is shown in Figure 4-12. From the stress-strain curve, it can be seen that the yield strength of the Zn-0.8Cu microtube exceeds 217 MPa, the tensile strength is 278 MPa, and the material yields. The strength ratio is 78%. The elastic zone of zinc-copper alloy is short, the uniform plastic deformation zone is short but the plastic instability zone is long; at this tensile rate (e_Lc=0.0067s^-1), a certain degree of work hardening occurs, and the final elongation at break is about 22%.