Description of the phenomenon
Steel aging

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M235 V1 Article

Description of the phenomenon


Steel aging

Author : Marc GRUMBACH

Publication date: January 10, 1993 | Lire en français

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2. Description of the phenomenon

The two aging modes are distinguished by the presence or absence of strain hardening, but they share a number of common features and consequences for mechanical properties.

The term "ageing" is reserved for the evolution over time between ambient temperature and 300°C of the properties of ferritic or ferrito-perlitic steels. The properties concerned are physical: resistivity, internal friction, thermoelectric power, etc., and mechanical: yield strength, resistance, elongation, impact strength, etc.

2.1 Ageing after quenching

This type of aging corresponds to a return to equilibrium after rapid cooling, with interstitials dissolving in the ferritic range around 700°C, a temperature where solubility is high (figure

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