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Mechanical Characterization of Functionally Graded Materials with a Yield Strength Gradient

Published online by Cambridge University Press:  17 March 2011

A. Nayebi ,
G. Mauvoisin ,
O. Bartier  and
R. El Abdi
A. Nayebi
Affiliation:
University of Rennes Applied Mechanics Research Laboratory I.U.T. de Rennes. 3, rue du Clos Courtel - B.P. 90422 35704 Rennes Cedex 7, France
G. Mauvoisin
Affiliation:
University of Rennes Applied Mechanics Research Laboratory I.U.T. de Rennes. 3, rue du Clos Courtel - B.P. 90422 35704 Rennes Cedex 7, France
O. Bartier
Affiliation:
University of Rennes Applied Mechanics Research Laboratory I.U.T. de Rennes. 3, rue du Clos Courtel - B.P. 90422 35704 Rennes Cedex 7, France
R. El Abdi
Affiliation:
University of Rennes Applied Mechanics Research Laboratory I.U.T. de Rennes. 3, rue du Clos Courtel - B.P. 90422 35704 Rennes Cedex 7, France
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Abstract

An elasto-plastic spherical indentation study on materials with a yield strength gradient, like steels which have undergone thermal hardening such as nitriding, is carried out using both experimental and finite element methods. A theory based on the evolution of hardness, is proposed to determine the yield stress and hardness profiles for materials with a decreasing yield stress with depth.

Results for carbo-nitriding steels obtained by the standard Vickers micro hardness technique are compared with those obtained by the proposed method.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 697: Symposium P – Surface Engineering 2001--Fundamentals and Applications , January 2001 , P1.7
Copyright
Copyright © Materials Research Society 2002

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