Integrated Constitutive Model for Flow Behavior of Pure Titanium Considering Interstitial Solute Concentration
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- Title
- Integrated Constitutive Model for Flow Behavior of Pure Titanium Considering Interstitial Solute Concentration
- Authors
- Won, JW; Park, CH; Lee, T; Lee, CS
- Date Issued
- 2014-11
- Publisher
- KOREAN INST METALS MATERIALS
- Abstract
- The aim of this work is to develop a constitutive model that can predict the flow behavior of pure Ti with different interstitial concentrations and grain sizes. To build a database required for identifying material constants, three different grades of Ti were subjected to tensile tests at temperatures of 223, 300, 473, 673 or 773 K and at a fixed strain rate of 10(-3)s(-1). In the modeling procedure, the mechanical threshold stress model was further modified to capture both the hardening effects attributed to the changes in equivalent oxygen concentration (O-eq) and the softening effect caused by deformation heating at high strain rates. The developed model can reasonably predict the flow behavior of pure Ti having different O-eq (0.14-0.32 wt%), and grain size (14.5-90 mu m) over a temperature range of 135 to 673 K, and a strain rate range of 2x10(-4) to 1400 s(-1)
- Keywords
- metals; deformation; mechanical properties; tensile test; modeling; TA-W ALLOYS; DEFORMATION MECHANISMS; ELEVATED-TEMPERATURES; ALPHA-TITANIUM; STRAIN RATES; STRESS; TI-6AL-4V
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13629
- DOI
- 10.1007/S12540-014-6004-8
- ISSN
- 1598-9623
- Article Type
- Article
- Citation
- METALS AND MATERIALS INTERNATIONAL, vol. 20, no. 6, page. 1017 - 1025, 2014-11
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