Grain refinement and texture formation in torsion deformed NiAl
Grain refinement and texture formation in torsion deformed NiAl
复制标题
扭转变形 NiAl 中的晶粒细化和织构形成
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
W. Skrotzki
中科院分区：
文献类型：
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作者：
B. Klöden;E. Rybacki;C. Oertel;W. Skrotzki
摘要：采用高温高压下的扭转使金属间化合物NiAl发生严重变形。利用取向成像显微镜和同步辐射衍射仪分别研究了其显微组织和织构随剪切应变的变化规律。结果表明：在高剪切应变下，通过连续动态再结晶形成稳态晶粒组织和织构；最小晶粒尺寸在微米范围内，主要织构成分为{110}<100>。高应变扭转为NiAl的晶粒细化、织构形成和延展性开辟了新的可能性。
Abstract Torsion at elevated temperatures and pressures was used to severely deform the intermetallic compound NiAl. The microstructure and texture as a function of shear strain were investigated by orientation imaging microscopy and diffraction of synchrotron radiation, respectively. The results show that at high shear strains a steady state grain structure and texture develops by continuous dynamic recrystallisation. The lowest grain size achieved is in the micron range, the main texture component is {110}<100>. It is concluded that high-strain torsion may open new possibilities in terms of grain refinement, texture formation and ductilisation of NiAl.