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Experimental and numerical analyses of instrumented and continuous indentation of treated steels
Ist Teil von
Journal of materials processing technology, 2003-10, Vol.141 (2), p.276-283
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2003
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The present paper uses the indentation of materials with a yield strength gradient, by spherical indenters in order to obtain Vickers hardness profile.
Using finite element modelling, a simulation of elasto-plastic spherical indentation of materials with a yield stress was carried out. A theoretical model for effective mean pressure evolution of the spherical indentation on the surface of heat treated steels was obtained. Using the preceding model and steepest descent optimisation algorithms, a method for determining Vickers hardness profile (surface hardness and layer thicknesses) of these steels, is given.
Results for carbo-nitriding steels obtained by the standard Vickers micro-hardness techniques (on the section taken through the surface) are compared with those obtained by the proposed method.