Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 28    No. 6    June 2018

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Microstructure and textural evolution during cold rolling and annealing of commercially pure titanium sheet
Na LIU1, Ying WANG1,2, Wei-jun HE1, Jun LI2, Adrien CHAPUIS1, Bai-feng LUAN1, Qing LIU1

1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
2. Pangang Group Research Institute Co., Ltd., Chengdu 610031, China

Abstract:The effects of cold rolling and annealing on the microstructure and textural evolution of a commercially pure titanium (CP-Ti) sheet were investigated. Electron backscatter diffractometry demonstrates that the deformation during rolling is accommodated by twinning and slip. Additionally, twinning is the dominant deformation mechanism when the cold rolling reduction is less than 40%. During rolling, contraction twinning (CT) and extension twinning (ET) are activated. And, the intensity of the (0002) pole along the ND gradually increases with increasing deformation. During annealing, the fraction of low angle grain boundaries (LAGBs) and the intensity of the (0002) pole along the ND gradually decrease slightly with increasing annealing time, while twinning lamellae disappear rapidly. When the annealing time reaches 60 min, 20% cold-rolled sheet recrystallizes almost completely.


Key words: commercially pure titanium; texture; twinning; cold rolling; recrystallization

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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