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Acoustoelastic Determination of the Fourth Order ODF Coefficients and Application to R-Value Prediction

Published online by Cambridge University Press:  21 February 2011

D. Daniel ,
K. Sakata ,
J. J. Jonas ,
I. Makarow  and
J. F. Bussiere
D. Daniel
Affiliation:
McGill University, 3450 University Street, Montreal, Canada, H3A 2A7
K. Sakata
Affiliation:
McGill University, 3450 University Street, Montreal, Canada, H3A 2A7
J. J. Jonas
Affiliation:
McGill University, 3450 University Street, Montreal, Canada, H3A 2A7
I. Makarow
Affiliation:
National Research Council Canada, Industrial Materials Research Institute, 75 De Mortagne Blvd., Boucherville, Québec, Canada, J4B 6Y4
J. F. Bussiere
Affiliation:
National Research Council Canada, Industrial Materials Research Institute, 75 De Mortagne Blvd., Boucherville, Québec, Canada, J4B 6Y4
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Abstract

The fourth order orientation distribution function (ODF) coefficients of textured low carbon steel sheets were determined nondestructively from the anisotropy of the velocity of Lamb (So) and SHO plate waves measured using electromagnetic acoustic transducers (EMATs). The three coefficients (C411, C412, C413) are calculated from five velocity measurements made in three directions in the rolling plane of the sheet using the Hill approximation by an iterative numerical method. The coefficients were also determined from Young's modulus measurements based on a resonance technique and are compared to those obtained ultrasonically. The comparison with coefficients determined from X-ray diffraction pole figures permits adjustment of the C411 coefficient and then very good agreement is obtained. The plastic strain ratios (R-values) of the steel samples are predicted from the adjusted coefficients using a series expansion method based on the Taylor theory of crystal plasticity. These are compared with experimental measurements and again good agreement is displayed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 142: Symposium U – Nondestructive Monitoring of Materials Properties , 1988 , 77
Copyright
Copyright © Materials Research Society 1989

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References

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