Double compression method is an effective method to determine static recrystallization volume fraction of materials because there is a marked difference in flow stress between two passes, which is caused by static recrystallization. And now offset method that is based on some specific flow stress is widely used. However, this method is not suitable to determine static recrystallization volume fraction for all the materials, especially for those alloyed steels. As the measurement of yield or flow stress is not very sensitive to a subtle change in precipitation, strain energy is the integration of the flow stress and so it is more sensitive to the subtle change and so this method could be better. This study aims to present strain energy method to determine static recrystallization volume fraction in details by performing uniaxial compression test on a microalloyed steel. And it was found that there were two points worth to note while performing this method: one is that if work hardening plays a dominant role during compression process, static recrystallization volume fraction can be determined by analyzing double compression curve and its extrapolation, on the contrary if dynamic softening plays the dominant role, the static recrystallization volume fraction has to be determined with the assistance of curve from single pass compression test.

中文翻译：

---

微合金钢静态再结晶体积分数的应变能法测定

双压缩法是确定材料静态再结晶体积分数的有效方法，因为静态再结晶引起的两道次流动应力存在显着差异。现在广泛使用的是基于某些特定流动应力的偏移方法。然而，这种方法并不适用于确定所有材料的静态再结晶体积分数，特别是对于那些合金钢。由于屈服或流动应力的测量对降水的细微变化不是很敏感，应变能是流动应力的积分，因此对细微变化更敏感，因此这种方法可能会更好。本研究旨在通过对微合金钢进行单轴压缩试验，提出应变能法来详细确定静态再结晶体积分数。并发现在执行该方法时有两点值得注意：一是如果在压缩过程中加工硬化起主导作用，则可以通过分析双压缩曲线及其外推法确定静态再结晶体积分数，反之如果动态软化起主导作用，则静态再结晶体积分数必须借助单道次压缩试验曲线确定。