Rotation and Splitting of Crystal Orientation in a Cu Single Crystal Caused by Rolling and Accumulative Roll-Bonding
Rotation and Splitting of Crystal Orientation in a Cu Single Crystal Caused by Rolling and Accumulative Roll-Bonding
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轧制和累积轧制引起的铜单晶晶体取向的旋转和分裂
DOI：
10.2320/jinstmet.j2013037
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Onaka
中科院分区：
文献类型：
--
作者：
Akari Yoshida;Y. Miyajima;S. Onaka
观察了铜单晶在沿着晶体学非对称方向剧烈塑性变形后显微组织的变化。对从单晶体上切下的具有（15 12 5）[9 10 3 <$]取向的板状试样进行了轧制和累积叠轧复合变形。当轧制的对数等效应变eeq为0.9时，在试样内部观察到晶体取向旋转到（2 1 1）[1 1 <$1 <$]，而没有取向分裂。虽然取向分裂发生在样品的表面附近，但当eeq为3.5时，仍然观察到接近（2 1 1）[1 1 <$1 <$]的带状区域。当eeq为5.0时，观察到与严重变形的多晶Cu相似的超细晶组织。[doi：10.2320/jinstmet.J2013037]
Changes in microstructure of a Cu single crystal by severe plastic deformation along a crystallographically asymmetric direction were observed. Platelike specimens with (15 12 5)[9 10 3̃] orientation cut from the single crystal were deformed by rolling and accumulative rollbonding. When the logarithmic equivalent strain eeq of rolling was 0.9, rotation of crystal orientation to (2 1 1)[1 1̃ 1̃] without orientation splitting was observed inside the specimens. Although orientation splitting occurred near surfaces of the specimens, the bandlike regions with near (2 1 1)[1 1̃ 1̃] were still observed when eeq was 3.5. When eeq was 5.0, ultrafinegrained structure similar to that in severely deformed polycrystalline Cu was observed. [doi:10.2320/jinstmet.J2013037]