The intragranular strains and the microstructure within recrystallizing grains in single phase pure iron have been systematically studied in 3D using synchrotron micro-diffraction. In contradiction to common knowledge we observe that residual elastic strains of up to 1–2 × 10⁻³ are present in the recrystallizing grains. The local strain variations within individual grains can be similar in magnitude to those between different grains. The effects of processing parameters, including rolling reduction, recrystallized volume fraction, and cooling rate, as well as microstructural parameters, including grain size, orientation and internal misorientation, on the development of local residual elastic strains and microstructure have been quantified. It is suggested that the difference in local defect density between recrystallized grains and the surrounding deformed matrix, as well as the redistribution of medium to long-range residual stresses in the deformed grains, are the main reasons for the development of such strains in the recrystallized grains. The local residual stress levels are calculated and their possible impact on the mechanical properties and recrystallization processes are discussed.

使用同步加速器微衍射在 3D 中系统地研究了单相纯铁中再结晶晶粒内的晶内应变和微观结构。与常识相反，我们观察到高达1-2 × 10 ^-3的残余弹性应变存在于再结晶晶粒中。局部应变变化单个晶粒内的大小可以与不同晶粒之间的大小相似。已经量化了加工参数（包括压下率、再结晶体积分数和冷却速率）以及微观结构参数（包括晶粒尺寸、取向和内部取向错误）对局部残余弹性应变和微观结构发展的影响。表明再结晶晶粒与周围变形基体之间局部缺陷密度的差异，以及变形晶粒中中长程残余应力的重新分布，是再结晶晶粒内产生此类应变的主要原因。谷物。