Deformation-Induced Recrystallization of Magnesium Single Crystals at Ambient Temperature
Deformation-Induced Recrystallization of Magnesium Single Crystals at Ambient Temperature
复制标题
常温下镁单晶的形变诱导再结晶
DOI：
10.1088/1757-899x/82/1/012014
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
D. Molodov
中科院分区：
文献类型：
--
作者：
K. Molodov;T. Al;D. Molodov
在室温下，对特殊取向的镁单晶进行了沿c轴伸长方向的平面应变压缩，压缩方向为<；112̄0>；。样品表现出出色的可成形性，最终应变对数可达-1。光学显微镜和取向成像显微镜的研究表明，低应变下大量的{101̄2}伸展孪晶消耗了整个样品，并导致了新的软滑移取向。观察还表明，通过二次和三次孪生事件，在完全孪生的母体中发生了额外的孪生。在新形成的变形后期，在许多与原变形孪晶有关的带状组织中观察到等轴状细晶。这些以低取向分布为特征的“再结晶”晶粒产生了新的取向，这导致了变形过程中织构的显著弱化和随机化，直至非常大的应变。本文讨论了多孪晶和室温连续动态再结晶引起的组织演变的文献结果。
Specially oriented magnesium single crystals were subjected to plane strain compression along the <112̄0> direction in c-axis extension at ambient temperature. The samples exhibited outstanding formability deforming up to a logarithmic final strain of -1. Investigations by optical and orientation imaging microscopy revealed that massive {101̄2} extension twinning at low strains consumed the whole sample and resulted in new soft orientations for slip. Observations also indicated that additional twinning took place in the completely twinned matrix by secondary and tertiary twinning events. At advanced stages of deformation newly formed, equiaxed small grains were observed within numerous bands related to former deformation twins. These “recrystallized” grains characterized by a low grain orientation spread of less than 1° generated new orientations, which led to a substantial weakening and randomization of the texture during deformation up to very large strains. The reported results in this paper are discussed with regard to the microstructure evolution arising from multiple twinning and continuous dynamic recrystallization at room temperature.
影响因子：
9.4
作者：
Molodov, Konstantin D.;Al-Samman, Talal;Gottstein, Guenter
通讯作者：
Gottstein, Guenter