In the present study, the effect of secondary phase particles and deformation localization on tensile behaviors of Mg-Zn-Ca alloy were investigated using micro-digital image correlation method. To isolate the effect of the secondary phase particles on tensile behavior, the fractions of the secondary phase particles were adjusted by controlling the annealing temperature. Thermodynamic calculations were performed to identify the fractions of the secondary phase particles. The finite element method was conducted to confirm the localized deformation around the secondary phase particles considering 3-dimensional microstructure. The results suggest that the total fraction of the secondary phase particles affected the localized deformation around the particles and micro-crack propagation process during a tensile test.

在本研究中，使用微数字图像相关方法研究了第二相颗粒和变形局部化对Mg-Zn-Ca合金拉伸行为的影响。为了隔离次级相颗粒对拉伸行为的影响，可以通过控制退火温度来调节次级相颗粒的分数。进行热力学计算以鉴定次级相颗粒的分数。考虑到三维微观结构，进行了有限元方法以确认次生相颗粒周围的局部变形。结果表明，第二相颗粒的总分数影响了拉伸试验期间颗粒周围的局部变形和微裂纹扩展过程。