scholarly journals Comparative Analysis of Plastic Flow and Grain Refinement in Pure Aluminium Subjected to Simple Shear-Based Severe Plastic Deformation Processing

2012 ◽  
Vol 53 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Dmitry Orlov ◽  
Yoshikazu Todaka ◽  
Minoru Umemoto ◽  
Yan Beygelzimer ◽  
Nobuhiro Tsuji
Keyword(s):  
Plastic Deformation ◽  
Comparative Analysis ◽  
Severe Plastic Deformation ◽  
Grain Refinement ◽  
Plastic Flow ◽  
Simple Shear ◽  
Severe Plastic Deformation Processing ◽  
Pure Aluminium ◽  
Deformation Processing

Developing the Technique of Severe Plastic Deformation Processing through High-Pressure Torsion

2010 ◽  
Vol 667-669 ◽  
pp. 397-402 ◽  
Author(s):  
Megumi Kawasaki ◽  
Terence G. Langdon
Keyword(s):  
Plastic Deformation ◽  
High Pressure ◽  
Severe Plastic Deformation ◽  
Grain Refinement ◽  
High Pressure Torsion ◽  
Severe Plastic Deformation Processing ◽  
Average Grain Size ◽  
High Purity Aluminum ◽  
Sample Characteristics ◽  
Nanoscale Range

The processing of metals through the application of severe plastic deformation provides the potential for achieving exceptional grain refinement in bulk solids. Several SPD methods are now available but processing by high-pressure torsion (HPT) has attracted much attention over the last five years. Numerous reports are now available describing the application of HPT to a range of pure metals and simple alloys and excellent grain refinement were achieved using this process with the average grain size often reduced to the nanoscale range. However, in order to make this technique more practical, the nature of the sample characteristics immediately after conventional HPT must be considered in order to understand the fundamental principles of HPT processing. This report examines the procedure with special emphasis on the evolution in hardness homogeneity in both high-purity aluminum and a Zn-22% Al eutectoid alloy processed by HPT.

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