Sequential activation of deformation modes in a fiber-textured magnesium alloy AZ31B during tensile deformation was investigated through in-situ observation of microstructure evolution under EBSD. The results showed that initiation of deformation modes is asynchronous, texture has little effect on the activation sequence. Basal <a> slip is the mode activated first, and then{10–12} extension twinning and {10–11} contraction twinning. It is concluded that prismatic <a> and pyramidal <c+a> slips could be activated subsequently with basal slip. Kernal average misorientation (KAM) varies within individual grains indicating the inhomogeneity of the deformation. Slips are activated early inside small grains at the grain boundaries. The activation of most twin variants is SF-related. The activation of some non–SF–related twin variants can be explained in terms of strain accommodation parameter.

通过现场观察EBSD下组织的演变，研究了纤维变形镁合金AZ31B在拉伸变形过程中变形模式的顺序激活。结果表明，变形模式的启动是异步的，纹理对激活序列的影响很小。基底<一>滑移是首次激活模式，然后{10-12}孪晶扩展和{10-11}孪晶收缩。可以得出结论，棱柱形<一>及锥体< Ç +一>随后可以使用基础滑移激活滑移。内核平均取向错误（KAM）在单个晶粒内变化，表明变形的不均匀性。滑移在晶粒边界处的小晶粒内部较早被激活。大多数双胞胎变体的激活与SF相关。一些与非SF相关的孪生变体的激活可以用应变适应参数来解释。