Microstructural homogeneity and superplastic behavior in an aluminum–copper eutectic alloy processed by high-pressure torsion

2015 ◽  
Vol 50 (20) ◽  
pp. 6700-6712 ◽  
Author(s):  
Megumi Kawasaki ◽  
Han-Joo Lee ◽  
Terence G. Langdon
Keyword(s):  
High Pressure ◽  
Eutectic Alloy ◽  
High Pressure Torsion ◽  
Superplastic Behavior ◽  
Microstructural Homogeneity

Developing Hardness and Microstructural Homogeneity in High-Pressure Torsion

2012 ◽  
Vol 706-709 ◽  
pp. 1805-1810
Author(s):  
Megumi Kawasaki ◽  
Terence G. Langdon
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Pure Aluminum ◽  
Applied Pressure ◽  
Processing Technique ◽  
Outer Periphery ◽  
Gradual Evolution ◽  
High Purity Aluminum ◽  
Thin Disks ◽  
Microstructural Homogeneity

High-pressure torsion (HPT) is a processing technique in which samples, in the form of thin disks, are subjected to a high applied pressure and concurrent torsional straining. In principle, the strain introduced into the disk during the straining varies across the disk and there is a direct proportionality between the estimated strain and the radial position on the disk. This means that the strain is zero at the center of each HPT disk and it reaches a maximum value at the outer periphery. Contrary to these expectations, recent experiments show there is a gradual evolution with increasing numbers of revolutions such that the hardness of the disk gradually becomes reasonably homogeneous. This report examines the development of hardness and microstructural homogeneity with special emphasis on the evolution in hardness homogeneity along vertical sections of disks of high-purity aluminum processed by HPT. The results demonstrate that, at least for pure aluminum, the distributions in the hardness values are independent of the plane of sectioning.

Evolution of microstructural homogeneity in copper processed by high-pressure torsion

2010 ◽  
Vol 63 (5) ◽  
pp. 560-563 ◽  
Author(s):  
X.H. An ◽  
S.D. Wu ◽  
Z.F. Zhang ◽  
R.B. Figueiredo ◽  
N. Gao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Microstructural Homogeneity

Effect of high pressure torsion on the precipitation hardening in Al–Ca–La based eutectic alloy

2021 ◽  
Vol 802 ◽  
pp. 140633
Author(s):  
T.K. Akopyan ◽  
N.A. Belov ◽  
A.A. Lukyanchuk ◽  
N.V. Letyagin ◽  
Т.А. Sviridova ◽  
...  
Keyword(s):  
High Pressure ◽  
Eutectic Alloy ◽  
Precipitation Hardening ◽  
High Pressure Torsion

Superplastic Behavior in High-Pressure Torsion-Processed Mo7.5Fe55Co18Cr12.5Ni7 Medium-Entropy Alloy

2020 ◽  
Vol 52 (1) ◽  
pp. 1-7
Author(s):  
Nhung Thi-Cam Nguyen ◽  
Peyman Asghari-Rad ◽  
Jae Wung Bae ◽  
Praveen Sathiyamoorthi ◽  
Hyoung Seop Kim
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Superplastic Behavior

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
Sign in / Sign up

Export Citation Format

Share Document