scholarly journals Evidence for a transition in deformation mechanism in nanocrystalline pure titanium processed by high-pressure torsion

2016 ◽  
Vol 96 (16) ◽  
pp. 1632-1642 ◽  
Author(s):  
Chao Yang ◽  
Min Song ◽  
Yong Liu ◽  
Song Ni ◽  
Shima Sabbaghianrad ◽  
...  
Keyword(s):  
High Pressure ◽  
Deformation Mechanism ◽  
High Pressure Torsion ◽  
Pure Titanium

Evolution of plasticity, strain-rate sensitivity and the underlying deformation mechanism in Zn–22% Al during high-pressure torsion

2014 ◽  
Vol 75 ◽  
pp. 102-105 ◽  
Author(s):  
In-Chul Choi ◽  
Yong-Jae Kim ◽  
Byungmin Ahn ◽  
Megumi Kawasaki ◽  
Terence G. Langdon ◽  
...  
Keyword(s):  
High Pressure ◽  
Strain Rate ◽  
Strain Rate Sensitivity ◽  
Deformation Mechanism ◽  
High Pressure Torsion ◽  
Rate Sensitivity

scholarly journals Slippage during high-pressure torsion of commercially pure titanium and application of accumulative HPT to it

2022 ◽  
Vol 1213 (1) ◽  
pp. 012003
Author(s):  
D V Gunderov ◽  
A A Churakova ◽  
A V Sharafutdinov ◽  
V D Sitdikov ◽  
V V Astanin
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Pure Titanium ◽  
Phase Changes ◽  
Phase Content ◽  
Commercially Pure Titanium ◽  
Micro Hardness ◽  
Ω Phase ◽  
Commercially Pure ◽  
First Time

Abstract A new efficient method was used to find that in the case of high-pressure torsion of commercially pure titanium, accumulation of shear strain in Ti does not occur due to slippage of anvils. Despite this, micro-hardness increases as the number of turns n increases, and Ti structure is refined more intensively. High-pressure torsion is accompanied by a high-pressure ω-phase formation. However, the content of ω-phase changes non-monotonously with an increase in the number of turns. First, while number of turns is less than n=5, the ω-phase content reaches 50%. Upon further deformation, the ω-phase content decreases to 15% for n=20. A new accumulative high-pressure torsion method is applied to commercially pure titanium for the first time. Accumulative high-pressure torsion leads to the strongest transformation of the structure and an increase in hardness, since stronger real deformation occurs due to composition of compression and torsion strain cycles.

Effect of grain size on the micro-tribological behavior of pure titanium processed by high-pressure torsion

Wear ◽  
2012 ◽  
Vol 280-281 ◽  
pp. 28-35 ◽  
Author(s):  
Chuan Ting Wang ◽  
Nong Gao ◽  
Mark G. Gee ◽  
Robert J.K. Wood ◽  
Terence G. Langdon
Keyword(s):  
Grain Size ◽  
High Pressure ◽  
High Pressure Torsion ◽  
Tribological Behavior ◽  
Pure Titanium

Effect of Initial Grain Size on Deformation Mechanism during High‐Pressure Torsion in V 10 Cr 15 Mn 5 Fe 35 Co 10 Ni 25 High‐Entropy Alloy

2019 ◽  
Vol 22 (1) ◽  
pp. 1900587 ◽  
Author(s):  
Peyman Asghari-Rad ◽  
Praveen Sathiyamoorthi ◽  
Jae Wung Bae ◽  
Hamed Shahmir ◽  
Alireza Zargaran ◽  
...  
Keyword(s):  
Grain Size ◽  
High Pressure ◽  
Deformation Mechanism ◽  
High Pressure Torsion ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Effect of Initial Grain Size on Deformation Mechanism during High‐Pressure Torsion in V 10 Cr 15 Mn 5 Fe 35 Co 10 Ni 25 High‐Entropy Alloy

2020 ◽  
Vol 22 (1) ◽  
pp. 2070002
Author(s):  
Peyman Asghari-Rad ◽  
Praveen Sathiyamoorthi ◽  
Jae Wung Bae ◽  
Hamed Shahmir ◽  
Alireza Zargaran ◽  
...  
Keyword(s):  
Grain Size ◽  
High Pressure ◽  
Deformation Mechanism ◽  
High Pressure Torsion ◽  
High Entropy Alloy ◽  
High Entropy

Microstructure and metallic ion release of pure titanium and Ti–13Nb–13Zr alloy processed by high pressure torsion

2016 ◽  
Vol 91 ◽  
pp. 340-347 ◽  
Author(s):  
Ivana Dimić ◽  
Ivana Cvijović-Alagić ◽  
Bernhard Völker ◽  
Anton Hohenwarter ◽  
Reinhard Pippan ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Pure Titanium ◽  
Ion Release ◽  
13Zr Alloy

scholarly journals High Pressure Torsion of Pure Ti: Effect of Pressure and Strain on Allotropy

2010 ◽  
Vol 89-91 ◽  
pp. 171-176 ◽  
Author(s):  
Kaveh Edalati ◽  
Z. Horita ◽  
Masaki Tanaka ◽  
Kenji Higashida
Keyword(s):  
High Pressure ◽  
Phase Formation ◽  
Bending Strength ◽  
High Pressure Torsion ◽  
Applied Pressure ◽  
Pure Titanium ◽  
Equivalent Strain ◽  
Bending Tests ◽  
Commercial Grade ◽  
Wide Range

High-pressure torsion (HPT) was conducted on commercial grade pure titanium (99.4%) by applying pressures in a wide range from 1.2 to 40 GPa. When the microhardness was plotted against equivalent strain, the hardness saturates to a constant level at each applied pressure. Such a level at the saturation depends on the applied pressure: for up to the pressure of 4 GPa, the saturation level is independent of the pressure but, for the pressures above 4 GPa, the hardness gradually increases with pressure because of the formation of an  phase. Bending tests showed that an excellent ductility as well as high bending strength was achieved for the sample processed at 2 GPa. The bending ductility was reduced for the sample at 6 GPa because of the  phase formation.

scholarly journals Microstructural Evolution and Microhardness Variations in Pure Titanium Processed by High‐Pressure Torsion

2020 ◽  
Vol 22 (6) ◽  
pp. 1901462 ◽  
Author(s):  
Wanji Chen ◽  
Jie Xu ◽  
Detong Liu ◽  
Jianxing Bao ◽  
Shima Sabbaghianrad ◽  
...  
Keyword(s):  
High Pressure ◽  
Microstructural Evolution ◽  
High Pressure Torsion ◽  
Pure Titanium
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