scholarly journals A stored energy analysis of grains with shear texture orientations in Cu-Ni-Si and Fe-Ni alloys processed by high-pressure torsion

2020 ◽  
pp. 158142
Author(s):  
Hiba Azzeddine ◽  
Thierry Baudin ◽  
Anne-Laure Helbert ◽  
François Brisset ◽  
Yi Huang ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Analysis ◽  
High Pressure Torsion ◽  
Stored Energy ◽  
Shear Texture ◽  
Ni Alloys

Thermal Stability of Ultrafine-Grained Pure Titanium Processed by High-Pressure Torsion

2021 ◽  
Vol 1016 ◽  
pp. 338-344
Author(s):  
Wan Ji Chen ◽  
Jie Xu ◽  
De Tong Liu ◽  
De Bin Shan ◽  
Bin Guo ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Stability ◽  
Grain Size ◽  
High Pressure ◽  
Annealing Temperature ◽  
High Pressure Torsion ◽  
Stored Energy ◽  
Ultrafine Grained ◽  
Average Grain Size ◽  
Thermal Stability Of

High-pressure torsion (HPT) was conducted under 6.0 GPa on commercial purity titanium up to 10 turns. An ultrafine-grained (UFG) pure Ti with an average grain size of ~96 nm was obtained. The thermal properties of these samples were studied by using differential scanning calorimeter (DSC) which allowed the quantitative determination of the evolution of stored energy, the recrystallization temperatures, the activation energy involved in the recrystallization of the material and the evolution of the recrystallized fraction with temperature. The results show that the stored energy increases, beyond which the stored energy seems to level off to a saturated value with increase of HPT up to 5 turns. An average activation energy of about 101 kJ/mol for the recrystallization of 5 turns samples was determined. Also, the thermal stability of the grains of the 5 turns samples with subsequent heat treatments were investigated by microstructural analysis and Vickers microhardness measurements. It is shown that the average grain size remains below 246 nm when the annealing temperature is below 500 °C, and the size of the grains increases significantly for samples at the annealing temperature of 600 °C.

Effect of high-pressure torsion deformation on surface properties and biocompatibility of Ti-50.9 mol. %Ni alloys

2014 ◽  
Vol 9 (2) ◽  
pp. 029007 ◽  
Author(s):  
Dayangku Noorfazidah Awang Shri ◽  
Koichi Tsuchiya ◽  
Akiko Yamamoto
Keyword(s):  
High Pressure ◽  
Surface Properties ◽  
High Pressure Torsion ◽  
Ni Alloys ◽  
Torsion Deformation

scholarly journals An investigation of the stored energy and thermal stability in a Cu–Ni–Si alloy processed by high-pressure torsion

2019 ◽  
Vol 100 (6) ◽  
pp. 688-712 ◽  
Author(s):  
Hiba Azzeddine ◽  
Yousf Islem Bourezg ◽  
Abdel Yazid Khereddine ◽  
Thierry Baudin ◽  
Anne-Laure Helbert ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Pressure ◽  
High Pressure Torsion ◽  
Stored Energy

scholarly journals Stored energy in ultrafine-grained 316L stainless steel processed by high-pressure torsion

2017 ◽  
Vol 6 (4) ◽  
pp. 339-347 ◽  
Author(s):  
Moustafa El-Tahawy ◽  
Yi Huang ◽  
Taekyung Um ◽  
Heeman Choe ◽  
János L. Lábár ◽  
...  
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
316L Stainless Steel ◽  
High Pressure Torsion ◽  
Stored Energy ◽  
Ultrafine Grained

Intermixing of Fe and Cu on the Atomic Scale by High-Pressure Torsion as Revealed by Dc- and Ac-Squid Susceptometry

2020 ◽  
Author(s):  
Martin Stückler ◽  
Heinz Krenn ◽  
Lukas Weissitsch ◽  
Stefan Wurster ◽  
Reinhard Pippan ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Atomic Scale
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