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Workability characteristics and mechanical behavior modeling of severely deformed pure titanium at high temperatures

Title	Workability characteristics and mechanical behavior modeling of severely deformed pure titanium at high temperatures
Author	Sajadifar, Seyed Vahid, Yapıcı, Güney Güven
Publication Date:	2014-01
Publication Place	- Elsevier
Subject	Titanium, Equal channel angular extrusion/pressing, Severe plastic deformation, Modeling of hot deformation
Type	Periodical
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	0261-3069
Record ID	d8831c0d-4ee5-4e44-9add-b6e4c1299a9c
Library Location	Mechanical Engineering
Date	2014-01
Notes	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text	In the present study, compression tests were performed at temperatures of 600–900 °C and at strain rates of 0.001–0.1 s−1 to study the deformation and workability characteristics of commercially pure titanium after severe plastic deformation (SPD). It was found that the effects of temperature and strain rate are significant in dictating the steady state flow stress levels and the strain values corresponding to peak flow stress. The strain rate sensitivity (m) during hot compression of severely deformed Ti was shown to be strongly temperature dependent, where m increased with the increase in deformation temperature up to 800 °C. High temperature workability was analyzed based on the flow localization parameter (FLP). According to the FLP values, deformation at and below 700 °C is prone to flow localization. The flow behavior was predicted using Arrhenius type and dislocation density based models. The validities of the models were demonstrated with reasonable agreement in comparison to the experimental stress–strain responses.
DOI	10.1016/j.matdes.2013.07.057
Cilt	53

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Özyeğin University

Workability characteristics and mechanical behavior modeling of severely deformed pure titanium at high temperatures

Author Sajadifar, Seyed Vahid, Yapıcı, Güney Güven

Publication Date 2014-01

Publication Place - Elsevier

Subject Titanium, Equal channel angular extrusion/pressing, Severe plastic deformation, Modeling of hot deformation

Type Periodical

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 0261-3069

Record ID d8831c0d-4ee5-4e44-9add-b6e4c1299a9c

Library Location Mechanical Engineering

Date 2014-01

Notes Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Sample Text In the present study, compression tests were performed at temperatures of 600–900 °C and at strain rates of 0.001–0.1 s−1 to study the deformation and workability characteristics of commercially pure titanium after severe plastic deformation (SPD). It was found that the effects of temperature and strain rate are significant in dictating the steady state flow stress levels and the strain values corresponding to peak flow stress. The strain rate sensitivity (m) during hot compression of severely deformed Ti was shown to be strongly temperature dependent, where m increased with the increase in deformation temperature up to 800 °C. High temperature workability was analyzed based on the flow localization parameter (FLP). According to the FLP values, deformation at and below 700 °C is prone to flow localization. The flow behavior was predicted using Arrhenius type and dislocation density based models. The validities of the models were demonstrated with reasonable agreement in comparison to the experimental stress–strain responses.

DOI 10.1016/j.matdes.2013.07.057

Cilt 53