Modeling of Grain Size Distributions during Single Hit Deformation of a Nb-Containing Steel
Modeling of Grain Size Distributions during Single Hit Deformation of a Nb-Containing Steel
复制标题
含铌钢单次撞击变形过程中晶粒尺寸分布的建模
DOI：
10.1007/s11661-009-0167-9
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Strangwood
中科院分区：
文献类型：
--
作者：
A. Kundu;C. Davis;M. Strangwood
使用均质化（以消除连续铸造中的偏析效应）0.046 wt % Nb微合金化钢来检验Dutta-Sellars方程在描述1248 K和1348 K（975 ° C和1075 °C）之间变形的再结晶程度、晶粒尺寸分布以及在该Nb水平下析出的影响方面的有效性。使用具有模式晶粒尺寸的Dutta-Sellars方程高估了在高于1283 K（1010 °C）的温度下变形的再结晶程度，而对单个晶粒尺寸类别的行为进行建模，得到了更好的再结晶程度的一致性，并且还预测了所得的晶粒尺寸分布。在所研究的条件（在1498 K（1225 °C）下的再奥氏体化和具有0.3应变、保持10秒的单次撞击热机械模拟）内，应变诱导的沉淀对检测到的再结晶程度没有影响。
A homogenized (to remove segregation effects from continuous casting) 0.046 wt pct Nb-microalloyed steel was used to examine the validity of the Dutta–Sellars equation in describing the degree of recrystallization, grain size distributions, and the influence of precipitation at this Nb level for deformation between 1248 and 1348 K (975 and 1075 °C). Using the Dutta–Sellars equations with the mode grain size overestimated the degree of recrystallization for deformation at temperatures above 1283 K (1010 °C), while modeling the behavior for individual grain size classes gave better agreement for the degree of recrystallization and also predicted the resulting grain size distributions. Within the conditions studied (reaustenitization at 1498 K (1225 °C) and single hit thermomechanical simulation with 0.3 strain, 10-second hold), there was no effect of strain-induced precipitation on the extent of recrystallization detected.