用三维晶体取向分布函数（ＣＯＤＦ）分析法，和透射电镜（ＴＥＭ）、高温Ｘ射线衍射（ＨＴＸＲＤ）等手段研究了冷轧Ｔｉ板材α→β→α循环相变时组织与织构取向的形成及变化规律。结果表明，经１次α→β→α相变后，原冷轧和再结晶织构组分被强烈抑制，形成了（２１１０）［０１１１］等相变织构，经多次α→β→α相变后，组织与相变织构基本不变，而且出现部分（２１１５）冷轧织构组分的复原。对高温β相取向进行了测算，并结合取向变量选择进行分析。
The formation and inheritance of the transformation texture and microstructure during cyclic α→β→α phase transformation in cold rolled Ti sheet have been investigated by means of the crystalline orientation distribution function (CODF) analysis,the technique of TEM and high temperature X-ray diffraction (HTXRD). The results show that, after 1 cycle of α→β→α phase transformation, the original cold rolling texture component (2116)[2641] and the recrystallization texture component (1013)[1210] are almost completely suppressed, and the [2110]∥ ND transformation fibre texture is formed. And after 3 cycles of α→β→α transformation, the [2110]∥ND fibre texture is inherited, and the rolling texture components, such as (2115)[0110] etc, are partially recovered. Afterα→β→α transformation, the microstructure exhibits the typical Widmanstatten lamellar structure, and is also inherited after 3 cycles of α→β→α transformation. The orientation of β phase at 950 ℃ has been measured by HTXRD and predicted by Burgers' relationship with variant selection.(Correspondent: ZHU Zhishou, P.O. Box No. 15, Beijing Institute of Aeronautical Materials, Beijing 100095)
参考文献
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