scholarly journals Hardening of pure metals by high-pressure torsion: A physically based model employing volume-averaged defect evolutions

2013 ◽  
Vol 61 (1) ◽  
pp. 183-192 ◽  
Author(s):  
Marco J. Starink ◽  
Xiaoyu Cheng ◽  
Shoufeng Yang
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Physically Based Model ◽  
Physically Based ◽  
Pure Metals

Influence of the relaxation processes on the structure formation in pure metals and alloys under high-pressure torsion

2007 ◽  
Vol 55 (18) ◽  
pp. 6039-6050 ◽  
Author(s):  
M.V. Degtyarev ◽  
T.I. Chashchukhina ◽  
L.M. Voronova ◽  
A.M. Patselov ◽  
V.P. Pilyugin
Keyword(s):  
High Pressure ◽  
Structure Formation ◽  
High Pressure Torsion ◽  
Metals And Alloys ◽  
Relaxation Processes ◽  
Pure Metals

scholarly journals Correlation of Physical Parameters with Steady-State Hardness of Pure Metals Processed by High-Pressure Torsion

2010 ◽  
Vol 667-669 ◽  
pp. 683-688 ◽  
Author(s):  
Kaveh Edalati ◽  
Z. Horita
Keyword(s):  
High Pressure ◽  
Steady State ◽  
High Pressure Torsion ◽  
Large Strains ◽  
Physical Parameters ◽  
Homologous Temperature ◽  
Pure Metals ◽  
Temperature Shear ◽  
And Diffusion ◽  
Hardness Values

Pure metals of 30 elements with various crystal structures (bcc, fcc, hcp, diamond cubic, complex cubic, primitive hexagonal and tetragonal) are processed by high-pressure torsion (HPT) and their mechanical properties are subsequently evaluated by Vickers microhardness measurements. For all metals, the hardness reaches steady states at large strains where the hardness remains unchanged with further straining. It is shown that the hardness values at the steady state are characteristics of each metal and are successfully expressed as a unique function of the homologous temperature, shear modulus and physical parameters of metals such as melting temperature, specific heat capacity and diffusion coefficient except for a few elements. The findings are well applicable to predict the ultimate steady-state hardness of metals attained by HPT processing through the correlation established in this study.

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