Warm deformation behaviour of UFG CP-Titanium produced by I-ECAP
Qarni, Muhammad Jawad and Rosochowski, Andrzej and Boczkal, Sonia (2017) Warm deformation behaviour of UFG CP-Titanium produced by I-ECAP. IOP Conference Series: Materials Science and Engineering, 194. pp. 1-6. ISSN 1757-899X (https://doi.org/10.1088/1757-899X/194/1/012038)
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Abstract
The objective of the present study is to investigate the deformation behaviour of Ultrafine-grain (UFG) commercial purity Titanium (CP-Ti) at warm temperatures. Firstly, CP-Ti billets were processed through six passes of incremental equal channel angular pressing (I-ECAP) at 300° C using a die channel angle (Φ) of 120°. Uniaxial compression tests were then performed under isothermal conditions on cylindrical samples obtained from the UFG CP-Ti billets. A series of these tests were conducted at different temperatures of 400, 500 and 600 °C and at varying strain rates of 0.01, 0.1 and 1.0 s-1. In each test, the original height of the sample was deformed by ~50% of its original value. The true stress-strain curves obtained, revealed that the flow stress was sensitive to both temperature and strain rate. In general, the flow stress was higher for lower temperatures and higher strain rates. For tests conducted at 400 and 500 °C, the flow stress quickly reaches a peak value, beyond which it exhibits a steady state response where there is no appreciable change in flow stress with increasing strain. The 600 °C tests however shows a strain hardening behaviour. Microstructure of the sample deformed at 600 °C and 0.01 s-1, exhibited significant grain growth.
ORCID iDs
Qarni, Muhammad Jawad ORCID: https://orcid.org/0000-0001-7162-5524, Rosochowski, Andrzej ORCID: https://orcid.org/0000-0001-7896-8167 and Boczkal, Sonia;-
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Item type: Article ID code: 60468 Dates: DateEvent8 May 2017Published12 April 2017AcceptedSubjects: Technology > Manufactures Department: Faculty of Engineering > Design, Manufacture and Engineering Management Depositing user: Pure Administrator Date deposited: 19 Apr 2017 11:35 Last modified: 27 Sep 2024 01:00 URI: https://strathprints.strath.ac.uk/id/eprint/60468