Investigation of Microhardness and Microstructure of AZ31 Alloy after High Pressure Torsion
Investigation of Microhardness and Microstructure of AZ31 Alloy after High Pressure Torsion
复制标题
AZ31合金高压扭转后的显微硬度和显微组织研究
DOI：
10.1007/978-3-319-48223-1_108
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
E. Yoon
中科院分区：
文献类型：
--
作者：
J. Vrátná;M. Janeček;J. Stráský;Hyoung;E. Yoon
采用常温高压扭转（HPT）对铸态商用镁合金AZ31进行了1、3、5和15次旋转（应变范围为1 ~ 7）的处理。通过光镜和电镜观察了HPT应变作用下微观组织的演变。HPT是一种非常有效的晶粒细化方法。经过1次高温热处理后，初始的粗晶组织已经细化了近200倍（ε≈4）。通过详细的二维显微硬度测量来研究其力学性能。HPT应变在材料中引入了径向不均匀性，表现为中心明显下降，靠近试样外围最大。随着HPT引起的应变的增加，这种不均匀性不断地被抹去，并随着应变的增加趋于饱和。圆盘表面的三维网格显示了微硬度变化的波动特征。HPT施加的应变随着HPT匝数的增加而趋于饱和。
Cast commercial magnesium alloy AZ31 was processed by high pressure torsion (HPT) at room temperature for 1, 3, 5 and 15 rotations (strain ranged from 1 to 7). Micro structure evolution with strain imposed by HPT was observed by light and electron microscopy. HPT was shown to be a very effective method of grain refinement. The initial coarse grain structure was refined by a factor of almost 200 already after one HPT turn (ε ≈ 4). Mechanical properties were investigated by detailed 2-D microhardness measurements. HPT straining was found to introduce a radial inhomogeneity in the material which is manifested by a pronounced drop in the center and the maximum near the specimen periphery. With increasing strain due to HPT this inhomogeneity is continuously smeared out tending to saturate with increasing strain. Integrated 3-D meshes across the total surface of disks revealed the undulating character of microhardness variations. The strain imposed by HPT was shown to saturate with increasing number of HPT turns.
DOI：
10.1016/j.msea.2005.08.133
发表时间：
2005-11-25
影响因子：
6.4
作者：
Horita, Z;Langdon, TG
通讯作者：
Langdon, TG
DOI：
10.1016/j.msea.2007.12.046
发表时间：
2008-08-15
影响因子：
6.4
作者：
Kai, Masaaki;Horita, Zenji;Langdon, Terence G.
通讯作者：
Langdon, Terence G.
DOI：
10.1016/j.msea.2004.11.007
发表时间：
2005-02-25
影响因子：
6.4
作者：
Sakai, G;Horita, Z;Langdon, TG
通讯作者：
Langdon, TG