Experimental and numerical investigation on carbonitrided steel characterization with spherical indentation

SURFACE & COATINGS TECHNOLOGY

卷:258

Article

Moussa, Charbel¹  Bartier, Olivier¹  Mauvoisin, Gerard¹  Hernot, Xavier¹  Collin, Jean-Marc^1,2  Delattre, Guillaume³ 

[1] Univ Rennes 1, INSA Rennes, LGCGM, EA 3913, F-35708 Rennes 7, France

[2] Univ Nantes, F-44035 Nantes 1, France

[3] FAURECIA Automot Seating, F-61100 Le Pont De Vere, Caligny, France

关键词: Surface heat treatment;    Carbonitrided steel;    Spherical indentation;    Mechanical properties;    Hardening law;   

DOI  :  10.1016/j.surfcoat.2014.07.080

来源: Elsevier

【 摘 要 】

This study investigates the mechanical behavior of a carbonitrided steel, plastically graded material, during a spherical indentation test. We demonstrate that the behavior of a carbonitrided steel can be simulated accurately with a seven layer sample, including the surface, five intermediate layers and the substrate. Moreover, for engineering design simulations which require a lot of calculation time, using three layers provides a good compromise for accuracy. A complete experimental procedure involving seven successive identifications with inverse analysis gave the same results as a simpler procedure proposed in a previous paper. It is shown that the assumption of a linear variation of the properties in the intermediate layers between surface and substrate is valid. This is the first time that an instrumented roller indentation test has demonstrated the reliability of the proposed method for the mechanical characterization of carbonitrided steels with spherical indentation. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free