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HomeMaterials Science ForumMaterials Science Forum Vol. 941Micro-Scale Mechanical Behavior of...

Micro-Scale Mechanical Behavior of Ultrafine-Grained Materials Processed by High-Pressure Torsion

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Abstract:

Bulk ultrafine-grained (UFG) materials usually show superior mechanical and physical properties. The development of micro-mechanical behavior is observed after significant changes in microstructure through high-pressure torsion (HPT) processing. This report summarizes recent results on the evolution of small-scale mechanical response examined by the nanoindentation technique on two UFG materials including a high-entropy alloy and an Al-Mg metal matrix nanocomposite processed by HPT. Special emphasis is placed on demonstrating the interrelationship of essential microstructural changes with increasing torsional strain and applying a post-deformation annealing treatment and the evolution of the micro-mechanical behavior in these UFG materials by estimating the strain rate sensitivity.

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THERMEC 2018

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Periodical:

Materials Science Forum (Volume 941)

Pages:

1495-1500

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.1495

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Online since:

December 2018

Authors:

Megumi Kawasaki*, Jae Kyung Han, Dong Hyung Lee, Jae Il Jang, Terence G. Langdon

Keywords:

High-Pressure Torsion, Nanoindentation, Severe Plastic Deformation, Strain Rate Sensitivity, Ultrafine Grains

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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