Effect of shear deformation on refinement of crystal grains
Effect of shear deformation on refinement of crystal grains
复制标题
剪切变形对晶粒细化的影响
DOI：
10.1179/026708302225005855
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Nagai
中科院分区：
文献类型：
--
作者：
Tadanobu Inoue;S. Torizuka;K. Nagai
研究了低碳硅锰钢在不同变形模式下由变形奥氏体转变产生的铁素体晶粒结构。为了引入大的塑性应变，通过使用压缩型模拟器控制边缘的一对砧座来压缩样本，以保持应变率恒定。进行了显式有限元分析，以定量评估由砧压缩引起的样品中的不均匀应变分布。铁素体晶粒尺寸被绘制为分别有和没有剪切变形区域的等效塑性应变 ϵeq 的数值数据的函数。从形成更细的铁素体晶粒的角度讨论了剪切变形的一个有趣的影响。
Ferrite grain structures created through transformation from deformed austenite under different deformation modes have been investigated for a low carbon Si–Mn steel. To introduce a large plastic strain, a specimen is compressed by a pair of anvils with edges controlled to keep the strain rate constant by using a compression type simulator. An explicit finite element analysis was carried out to evaluate the non-uniform strain distribution quantitatively in the specimen induced by anvil compression. The ferrite grain size was plotted as a function of the numerically obtained data of the equivalent plastic strain ϵeq for areas with and withoutshear deformation, respectively. An interesting effect of the shear deformation is discussed from the viewpoint of the formation of finer ferrite grains.