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Experimental Observations of Cylindrical Indentation of a Metallic Glass

Published online by Cambridge University Press:  26 February 2011

Ashraf Bastawros ,
S.B. Biner  and
Ashraf Bastawros
Ashraf Bastawros
Affiliation:
bastaw@iastate.edu, Iowa State University, Aerospace Engineering and Mechanics, 2271 Howe Hall, Room 2347, Iowa State University, Ames, IA, 50011-2271, United States, (515) 294-3039, (515) 294-3262
S.B. Biner
Affiliation:
biner@ameslab.gov, Ames Laboratory (USDEO) Iowa State University, Materials and Engineering Physics, United States
Ashraf Bastawros
Affiliation:
bastaw@iastate.edu, Iowa State University, Aerospace Engineering and Mechanics, United States
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Abstract

In this study, the deformation behavior of a metallic glass under a cylindrical indenter is elucidated with in situ observations. The experimental observations for various indenter radii provide information on both macroscopic and microscopic details of the deformation. The deformation zones developed under indenters with different radii were found to be self-similar, in agreement with the predictions of the cavity expansion model. It will be shown that, the evolution of shear bands under the indenter resembles the solutions obtained from the slip line analysis. Finally, full field strain measurements can provide the detailed information regarding the temporal and the spatial evolution of the shear bands during the course of deformation.

Keywords

stress/strain relationshiptextureductility
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 903: Symposium Z – Amorphous and Nanocrystalline Metals for Structural Applications , 2005 , 0903-Z12-01
Copyright
Copyright © Materials Research Society 2006

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