Effect of pre-annealing strains on annealing texture developments in commercially pure (CP) titanium

Abstract

Hexagonal commercially pure titanium (cp-titanium) plates were subjected to unidirectional-rolling (rolling), accumulative roll-bonding (ARB) and cross-rolling in a laboratory rolling mill. Rolling and cross-rolling were carried out to impart 90% reduction in thickness and ARB processing was performed for six passes. The deformed plates were then subjected to annealing at 600 °C for a large range of soaking time starting from 0.17 min (10 s) to 30 min. It was observed that the samples were fully recrystallized after 5 min of annealing, irrespective of the rolling processes employed in this study. Also, the samples were seen to develop almost similar texture when annealing was carried out beyond 5 min of annealing time. However, before annealing, the texture development was seen to be different in the respective samples subjected to different rolling processes. The initial texture present in the deformed structure got strengthened during annealing of the samples under investigation. It was also observed that the texture development was insignificant in ARB-processed samples after annealing.

Keywords:

• annealing texture
• cp-titanium
• recrystallization
• ARB processing
• cross-rolling

Acknowledgements

The authors would like to thank Prof. I. Samajdar to conduct textural analysis at National Facility on OIM and Texture, IIT Bombay.

Disclosure statement

No potential conflict of interest was reported by the authors.

Notes

1. The equivalent strain for ARB processing of six passes is equal to 4.8.

Additional information

Funding

This work was supported by the Department of Science & Technology, India; University Grants Commission NRC-M, IISc Bangalore, India.