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Gradient microstructure and texture in wedge-based severe plastic burnishing of copper

Published online by Cambridge University Press:  27 April 2018

Zhiyu Wang ,
Saurabh Basu ,
Tejas G. Murthy  and
Christopher Saldana
Zhiyu Wang
Affiliation:
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332, Georgia
Saurabh Basu
Affiliation:
The Harold and Inge Marcus Department of Industrial and Manufacturing Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
Tejas G. Murthy
Affiliation:
Department of Civil Engineering, Indian Institute of Science, Bangalore 560012, India
Christopher Saldana*
Affiliation:
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332, Georgia
*
a)Address all correspondence to this author. e-mail: christopher.saldana@me.gatech.edu
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Abstract

In the present study, gradient microstructure and texture development in wedge-based severe plastic burnishing of oxygen-free high conductivity copper was investigated. Microstructural response and evolution of crystallographic texture in severe surface plastic deformation was shown to be controllable in terms of both magnitude and gradient through control of the incident wedge angle and burnishing parameters. Equiaxed ultra-fined grains and micro/nanoscale elongated grains were produced in the subsurface region, which is indicative of dynamic recrystallization at large strains in the subsurface. Subsurface regions exhibited a significant fraction of shear texture components along the 〈110〉 partial fibers. Texture evolution simulated using the visco-plastic self-consistent framework revealed variations in strain level controlling different mechanisms for rotation of these partial fibers from their ideal orientation. Controllability of subsurface properties and microstructure for such materials is briefly discussed. These results allude to fundamental limits in material processing by severe shear using scalable deformation configurations.

Keywords

severe plastic deformationmechanical behaviorburnishingparticle image velocimetry
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 8 , 27 April 2018 , pp. 1046 - 1056
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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