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90°模具室溫4道次ECAP變形純鈦的宏觀織構演變
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國家自然科學基金（50874086）；陜西省教育廳專項基金（12JK0430）；高等學校博士學科點專項科研基金（20116120110012）


Texture Evolution in Commercially Pure Titanium after ECAP Using a 90° Die at Room Temperature
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    摘要:

    采用兩通道夾角Φ=90°，外圓角ψ=20°的模具，實現(xiàn)TA1純鈦C方式4道次室溫ECAP(Equal Channel Angular Pressing)變形，制備了表面光滑無裂紋的變形試樣。研究純鈦室溫ECAP變形試樣的織構演變特征。結果表明：在ECAP變形初期，基面織構和錐面織構逐漸向P(φ1=45°，φ=0°~90°，φ2=30°)織構旋轉，基面織構和錐面織構減少，柱面織構增加，織構的演變是由位錯增殖導致微結構變化引起的。在變形后期因晶粒細化，織構演變主要由整個晶粒的旋轉來形成剪切織構，基面織構逐漸增加。

    Abstract:

    Commercially pure (CP) titanium (grade 1) was processed by equal channel angular pressing (ECAP) up to 4 passes via route C at room temperature using a die of Φ=90° and ψ= 20°. The as-processed CP-Ti billets were smooth and free of visible surface cracks. The texture evolution in CP-Ti after ECAP was investigated at room temperature. The results show that the basal and pyramidal textures gradually evolve to P (φ1=45°, φ=0°~90°, φ2=30°) texture. Basal and pyramidal textures are decreased, while prismatic texture is increased. Texture evolution in CP-Ti is caused by the dislocation multiplication in the early stage of ECAP deformation. In the later period of deformation, the shear texture is formed through the grain rotation and the basal texture is increased gradually due to grain refinement.

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趙西成,解 晨,王耿潔,楊西榮,劉曉燕,邦江濤.90°模具室溫4道次ECAP變形純鈦的宏觀織構演變[J].稀有金屬材料與工程,2013,42(6):1139~1145.[Zhao Xicheng, Xie Chen, Wang Gengjie, Yang Xirong, Liu Xiaoyan, Bang Jiangtao. Texture Evolution in Commercially Pure Titanium after ECAP Using a 90° Die at Room Temperature[J]. Rare Metal Materials and Engineering,2013,42(6):1139~1145.]
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  • 收稿日期:2012-06-15
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