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Materials 2017, 10(9), 1065; doi:10.3390/ma10091065

A Novel Approach to Estimate the Plastic Anisotropy of Metallic Materials Using Cross-Sectional Indentation Applied to Extruded Magnesium Alloy AZ31B

School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
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Received: 21 July 2017 / Revised: 3 September 2017 / Accepted: 7 September 2017 / Published: 11 September 2017
(This article belongs to the Special Issue Advanced Nanoindentation in Materials)
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Abstract

In this paper, a methodology is presented for obtaining the plastic anisotropy of bulk metallic materials using cross-sectional indentation. This method relies on spherical indentation on the free edge of a specimen, and examining the out-of-plane residual deformation contour persisting on the cross-section after unloading. Results obtained from numerical simulation revealed that some important aspects of the out-of-plane residual deformation field are only sensitive to the extent of the material plastic anisotropy, and insensitive to strain hardening, yield strain, elastic anisotropy, and the selected displacement threshold value. An explicit equation is presented to correlate the plastic anisotropy with the characteristic parameter of the bottom shape of residual deformation contour, and it is used to uniquely determine the material plastic anisotropy in cross-sectional indentation. Effectiveness of the proposed method is verified by application on magnesium alloy AZ31B, and the plastic anisotropy parameter obtained from indentation and uniaxial tests show good agreement. View Full-Text
Keywords: indentation; plastic anisotropy; parameter identification; metallic materials indentation; plastic anisotropy; parameter identification; metallic materials
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Wang, M.; Wu, J.; Wu, H.; Zhang, Z.; Fan, H. A Novel Approach to Estimate the Plastic Anisotropy of Metallic Materials Using Cross-Sectional Indentation Applied to Extruded Magnesium Alloy AZ31B. Materials 2017, 10, 1065.

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