5. Determination of residual stresses in surface layers
5.1 Calculation methods
The prediction of residual stresses generated by various surface heat treatments is currently part of many computer-aided design and production software packages. Figure shows an overview of the models typically used for hardening treatments after case-hardening and carbonitriding. They comprise four stages.
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The first step is to determine the transient thermal field in the part, usually using a finite element algorithm to solve the heat conduction equation and taking into account the boundary conditions imposed by the quenching medium. In the thermal conduction equation :
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Determination of residual stresses in surface layers
Conclusions
References
Standardization
- Série aérospatiale. Pièces métalliques. Mise en contrainte de compression superficielle. Billes d'acier, billes de verre et billes de céramique (grenailles) (remplace NF L 06-831, février 1990). - NF L 06-831 - 12-95
- Aéronautique et espace. Grenaillage destiné à la mise en contrainte de compression superficielle de pièces métalliques. - NF L 06-832 - 12-98
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