Abstract
The interval of existence of dynamic strain aging (DSA) in AISI type 304 austenitic stainless steel subjected to quasi-static tension tests, under strain rates from 3.5 x 10-2 to 3.5 x 10-4 s-1, in the temperature range from 25 to 800ºC was investigated. It was found that DSA occurs in the range extending from around 200 to 700ºC. Plastic instabilities associated with serrations, Portevin-Chatelier effect, allowed activation energies to be calculated and a possible mechanism of dislocation interaction with interstitial carbon atoms to be proposed. Significant increase in the ultimate strength, uniform elongation and work hardening demonstrate that DSA is a relevant phenomenon, which improves the high temperature mechanical properties of 304 steel.
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Monteiro, S. N., Pereira, A. C., De Oliveira Braga, F., De Sousa Lima, E., & Ferreira, C. L. (2017). Relevance of dynamic strain aging under quasi-static tension on AISI 304 stainless steel. In Materials Research (Vol. 20, pp. 421–425). Universidade Federal de Sao Carlos. https://doi.org/10.1590/1980-5373-mr-2016-0910
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