BFe10-1-1合金动态再结晶行为

Dynamic recrystallization behavior of BFe10-1-1 alloy

采用MMS^（-1）00热力模拟试验机对BFe10-1-1合金进行热压缩实验,研究了在温度800-1000℃和应变速率0.01-10 s^（-1）下的动态再结晶行为。基于加工硬化率对合金的应力应变进行分析,得到BFe10-1-1合金的动态再结晶临界应变。结果表明,BFe10-1-1合金在实验条件下发生了回复与动态再结晶,850℃时,0.01-10 s^（-1）下动态再结晶临界应变分别为0.106、0.109、0.103、0.099和0.089,即相同温度下,高的应变速率比低的应变速率先发生动态再结晶;1 s^（-1）时,80-1000℃对应的临界应变分别为0.111、0.103、0.094、0.097和0.096,即随着温度的升高,临界应变数值减小,动态再结晶提前;临界应力随应变速率的减小和变形温度的升高而减小。

Dynamic recrystallization behavior of BFe10-1-1 alloy during hot compression experiment was investigated at 800^（-1）000 ℃and 0. 01^（-1）0 s^（-1） on the MMS^（-1）00 thermal simulation test machine. The stress and strain of the alloy were analyzed based on the work hardening rate,and the critical strain of the dynamic recrystallization of BFe10-1-1 alloy was obtained. The results show that the recovery and dynamic recrystallization of BFe10-1-1 alloy occur under experimental conditions. The dynamic recrystallization critical strain is 0. 106,0. 109,0. 103,0. 099 and 0. 089 when the temperature is 850 ℃ and the strain rate is 0. 01^（-1）0 s^（-1）,which means that at the same temperature,the alloy with high strain rate is more prone to dynamic recrystallization than that with low strain rate. The critical strain is 0. 111,0. 103,0. 094,0. 097 and 0. 096 when the strain rate is 1 s^（-1） and the temperature is 80^（-1）000 ℃,which means that the dynamic recrystallization ouurs earlier with the temperature increases and critical strain decreases. And the decrease of strain rate and the increase of deformation temperature can reduce the critical stress of the alloy.