Micro-scale mechanical behavior of ultrafine-grained materials processed by high-pressure torsion

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

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.

Original languageEnglish
Title of host publicationTHERMEC 2018
EditorsR. Shabadi, Mihail Ionescu, M. Jeandin, C. Richard, Tara Chandra
PublisherTrans Tech Publications Ltd
Pages1495-1500
Number of pages6
ISBN (Print)9783035712087
DOIs
StatePublished - 2018
Externally publishedYes
Event10th International Conference on Processing and Manufacturing of Advanced Materials, 2018 - Paris, France
Duration: Jul 9 2018Jul 13 2018

Publication series

NameMaterials Science Forum
Volume941 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference10th International Conference on Processing and Manufacturing of Advanced Materials, 2018
Country/TerritoryFrance
CityParis
Period07/9/1807/13/18

Funding

This work was supported by the NRF Korea funded by MSIP under Grant No. NRF-2015R1A5A1037627 and NRF-2017R1A2B4012255 (JIJ); and the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS (TGL).

Keywords

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

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