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谷艳霞,马爱斌,江静华,宋丹.等通道转角挤压法制备超细晶纯钛的研究进展[J].稀有金属材料与工程(英文),2017,46(12):3639~3644.[Gu Yanxia,Ma Aibin,Jiang Jinghua and Song Dan.Research progress of ultrafine-grained pure titanium produced by equal-channel angular pressing[J].Rare Metal Materials and Engineering,2017,46(12):3639~3644.]
Research progress of ultrafine-grained pure titanium produced by equal-channel angular pressing
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Received:October 29, 2016  Revised:February 16, 2017
Key words: Titanium  equal channel angular pressing (ECAP)  processing parameter  deformation  properties
Foundation item:中国江苏省自然科学基金 (BK20131373); 中央高校基本科研专项资金(HHU2016B10314);江苏省高校青蓝工程
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Gu Yanxia,Ma Aibin,Jiang Jinghua and Song Dan  
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      Recently, fabrication techniques of ultrafine-grained (UFG) pure titanium have been investigated to achieve enhanced performance. This paper reveals the process and properties of bulk ultrafine-grained pure titanium by equal-channel angular pressing (ECAP), with the influence of experimental parameters. Special attention is given to the deformation mechanisms via dislocation slip and twinning during ECAP. It is demonstrated that the change of microstructure in UFG Ti leads to significant enhancement of mechanical properties. Some mixed results about corrosion resistance of UFG Ti indicate the further investigations necessary. Special emphasis is placed on the combination of ECAP and other treatments for improving overall properties. It is shown that significant enhancement has been made in UFG commercial-purity Ti after ECAP plus thermal-mechanical treatment, suggesting promising prospects of ECAP process for titanium alloys in various industries.