Graphite to diamond-like carbon phase transformation by high-pressure torsion

2013 ◽  
Vol 103 (3) ◽  
pp. 034108 ◽  
Author(s):  
Kaveh Edalati ◽  
Takeshi Daio ◽  
Yoshifumi Ikoma ◽  
Makoto Arita ◽  
Zenji Horita
Keyword(s):  
High Pressure ◽  
Phase Transformation ◽  
High Pressure Torsion ◽  
Diamond Like Carbon ◽  
Carbon Phase

Magnetic Characterization of SUS316L Deformed by High Pressure Torsion

2011 ◽  
Vol 239-242 ◽  
pp. 1300-1303
Author(s):  
Hong Cai Wang ◽  
Minoru Umemoto ◽  
Innocent Shuro ◽  
Yoshikazu Todaka ◽  
Ho Hung Kuo
Keyword(s):  
Plastic Deformation ◽  
High Pressure ◽  
Stainless Steel ◽  
Phase Transformation ◽  
Austenitic Stainless Steel ◽  
Volume Fraction ◽  
High Pressure Torsion ◽  
Austenitic Matrix ◽  
Magnetic Characterization

SUS316L austenitic stainless steel was subjected to severe plastic deformation (SPD) by the method of high pressure torsion (HPT). From a fully austenitic matrix (γ), HPT resulted in phase transformation from g®a¢. The largest volume fraction of 70% a¢ was obtained at 0.2 revolutions per minute (rpm) while was limited to 3% at 5rpm. Pre-straining of g by HPT at 5rpm decreases the volume fraction of a¢ obtained by HPT at 0.2rpm. By HPT at 5rpm, a¢®g reverse transformation was observed for a¢ produced by HPT at 0.2rpm.

Microstructural evolution and phase transformation in twinning-induced plasticity steel induced by high-pressure torsion

2016 ◽  
Vol 109 ◽  
pp. 300-313 ◽  
Author(s):  
X.H. An ◽  
Q.Y. Lin ◽  
G. Sha ◽  
M.X. Huang ◽  
S.P. Ringer ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Transformation ◽  
Microstructural Evolution ◽  
High Pressure Torsion

Phase Transformation and Annealing Behavior of SUS 304 Austenitic Stainless Steel Deformed by High Pressure Torsion

2010 ◽  
Vol 654-656 ◽  
pp. 334-337 ◽  
Author(s):  
Innocent Shuro ◽  
Minoru Umemoto ◽  
Yoshikazu Todaka ◽  
Seiji Yokoyama
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
Phase Transformation ◽  
Austenitic Stainless Steel ◽  
Volume Fraction ◽  
High Pressure Torsion ◽  
Two Phase ◽  
Annealing Behavior ◽  
304 Austenitic Stainless Steel ◽  
Deformed State

SUS 304 austenitic stainless steel was subjected to severe plastic deformation (SPD) by the method of high pressure torsion (HPT). From a fully austenitic matrix (γ), HPT resulted in phase transformation to give a two phase structure of austenite (γ) and martensite (α') by the transformation γα'. The phase transformation was accompanied by an increase in hardness (Hv) from 1.6 GPa in the as annealed form to 5.4 GPa in the deformed state. Subsequent annealing in temperature range 250oC to 450oC resulted in an increase in both α' volume fraction and hardness (6.4 GPa). Annealing at 600oC resulted in a decrease in α' volume fraction hardness.

scholarly journals Phase transformation and enhanced coercivity in B-N-doped MnAl nanocrystalline bulk alloys prepared by high pressure torsion

AIP Advances ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 015320
Author(s):  
Ping-Zhan Si ◽  
Chul-Jin Choi ◽  
Jihoon Park ◽  
Hong-Liang Ge ◽  
Juan Du
Keyword(s):  
High Pressure ◽  
Phase Transformation ◽  
High Pressure Torsion ◽  
Bulk Alloys

Phase transformation kinetics of ω-phase in pure Ti formed by high-pressure torsion

2015 ◽  
Vol 51 (5) ◽  
pp. 2608-2615 ◽  
Author(s):  
Nozomu Adachi ◽  
Yoshikazu Todaka ◽  
Kenshu Irie ◽  
Minoru Umemoto
Keyword(s):  
High Pressure ◽  
Phase Transformation ◽  
High Pressure Torsion ◽  
Transformation Kinetics ◽  
Ω Phase ◽  
Phase Transformation Kinetics ◽  
Kinetics Of

Allotropic phase transformation and photoluminescence of germanium nanograins processed by high-pressure torsion

2015 ◽  
Vol 51 (1) ◽  
pp. 138-143 ◽  
Author(s):  
Yoshifumi Ikoma ◽  
Takamitsu Toyota ◽  
Yoshimasa Ejiri ◽  
Katsuhiko Saito ◽  
Qixin Guo ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Transformation ◽  
High Pressure Torsion
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