TY - JOUR
T1 - High-temperature deformation behavior and microstructural characterization of high-Mn bearing titanium-based alloy
AU - Ebied, Saad
AU - Hamada, Atef
AU - Borek, Wojciech
AU - Gepreel, Mohamed
AU - Chiba, Akihiko
N1 - Funding Information:
The authors thankfully acknowledge the financial support from the Missions Sector-Higher Education Ministry, Egypt, and the Japan International Cooperation Agency (JICA) through this work. This work is in the frame of the joint research project ASRT/DST research project. The help and guidance of Prof. Kenta Yamanaka of Tohoku University , Japan is highly appreciated.
Funding Information:
The authors thankfully acknowledge the financial support from the Missions Sector-Higher Education Ministry, Egypt, and the Japan International Cooperation Agency (JICA) through this work. This work is in the frame of the joint research project ASRT/DST research project. The help and guidance of Prof. Kenta Yamanaka of Tohoku University, Japan is highly appreciated.
Publisher Copyright:
© 2018
PY - 2018/5
Y1 - 2018/5
N2 - Ti-Mn alloys exhibit an excellent potential for biomedical applications as well as structural engineering applications, especially in the aerospace industry. In order to control and enhance grain structure during the manufacturing of Ti-Mn alloys and thereby help to enhance mechanical properties such as strength and toughness, we studied the hot-deformation behavior of βTi-10Mn alloys. Isothermal compression tests were conducted in the strain rate range of 0.01–10 s−1 and temperatures in the range of 850–1000 °C using a Gleeble thermomechanical simulator. High-temperature flow stress curves exhibited discontinuous yielding and pronounced periodic serrations without any strain hardening during compression straining of these alloys. Such peculiar behavior of this alloy is due to active dynamic strain aging in its β-bcc structure. Metallographic observations by electron-backscattered diffraction (EBSD) analysis revealed that dynamic recovery (DRV) is more active than continuous dynamic recrystallization (CDRX) when the alloy is deformed at high strain rates, i.e. higher than 1 s−1. Furthermore, the constitutive behavior of the alloy was modeled and the apparent hot-deformation activation energy of the alloy was estimated to be 243 kJ/mol, which is ~60% higher than the self-diffusion energy in pure titanium.
AB - Ti-Mn alloys exhibit an excellent potential for biomedical applications as well as structural engineering applications, especially in the aerospace industry. In order to control and enhance grain structure during the manufacturing of Ti-Mn alloys and thereby help to enhance mechanical properties such as strength and toughness, we studied the hot-deformation behavior of βTi-10Mn alloys. Isothermal compression tests were conducted in the strain rate range of 0.01–10 s−1 and temperatures in the range of 850–1000 °C using a Gleeble thermomechanical simulator. High-temperature flow stress curves exhibited discontinuous yielding and pronounced periodic serrations without any strain hardening during compression straining of these alloys. Such peculiar behavior of this alloy is due to active dynamic strain aging in its β-bcc structure. Metallographic observations by electron-backscattered diffraction (EBSD) analysis revealed that dynamic recovery (DRV) is more active than continuous dynamic recrystallization (CDRX) when the alloy is deformed at high strain rates, i.e. higher than 1 s−1. Furthermore, the constitutive behavior of the alloy was modeled and the apparent hot-deformation activation energy of the alloy was estimated to be 243 kJ/mol, which is ~60% higher than the self-diffusion energy in pure titanium.
KW - Deformation mechanism
KW - Dynamic recovery
KW - Dynamic recrystallization
KW - Hot deformation
KW - Thermomechanical processing
KW - β-Titanium alloys
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U2 - 10.1016/j.matchar.2018.03.004
DO - 10.1016/j.matchar.2018.03.004
M3 - Article
AN - SCOPUS:85043392034
SN - 1044-5803
VL - 139
SP - 176
EP - 185
JO - Materials Characterization
JF - Materials Characterization
ER -