The growth behavior and crystallographic orientation of bainite in a low carbon steel were investigated by a combination of in situ observation and electron backscattered diffraction. The intersection of different bainitic ferrite (BF) laths was analyzed in detail. The results show that the growth of a given lath stops when it runs into a preexisting lath of bainitic ferrite. Growth resumes, after a short stasis, through the nucleation of a new lath on the other side of the obstructing lath. The newly nucleated lath has been termed BF-clone because it shares the same crystallographic orientation with the prior bainitic lath. The nucleation of the BF-clone is promoted by the accumulated transformation strain in the region where the growing lath intersected the pre-existing lath. During the growth of the bainitic ferrite laths, the transformation strain was accommodated through the formation of twin-related variant pairs, which formed one after another with the identical lengthening rates.

通过原位结合研究了贝氏体在低碳钢中的生长行为和晶体学取向。观察和电子背散射衍射。详细分析了不同贝氏体铁素体（BF）板条的交点。结果表明，当给定的板条遇到贝氏体铁素体预先存在的板条时，其生长停止。短暂停滞后，通过阻塞板条另一侧的新板条成核，恢复了生长。新成核的板条被称为BF-克隆，因为它与以前的贝氏体板条具有相同的晶体学取向。在生长板条与既有板条相交的区域中，累积的转化应变促进了BF型克隆的成核。在贝氏体铁素体板条的生长过程中，通过形成双相关变体对来适应转变应变，