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A Novel Biaxial Testing Apparatus for the Determination of Forming Limit under Hot Stamping Conditions
Published on: April 4, 2017
Evaluation of the Hot Workability of Commercially Pure Ti Using Hot Torsion Tests
Myoung-Hun Kim1, Ji-Woon Lee1, Sang-Wook Kim1
1Department of Materials Science and Engineering, Inha University, Incheon, 22212, Republic of Korea.
Abstract:
Optimum processing conditions were obtained by evaluating the hot working behavior of commercially pure Ti using hot torsion tests. Hot torsion tests were conducted at temperatures ranging from 800 °C-1000 °C and strain rates ranging from 0.1-10 s-1. The flow curves show that the peak stress increases as the temperature decreases and the strain rate increases. The optimum processing conditions were derived by comparing the processing and activation energy maps. The microstructure was characterized based on various regions of the processing map. The activation energy for plastic deformation was obtained using the constitutive equation. The activation energy differs depending on the constituent phases.
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