Resumen

SANTOS, Tiago Felipe de Abreu; ANDRADE, Margareth Spangler  y  CASTRO, Ana Luiza Resende de. Influence of heating rate on the reversion of strain-induced martensite in AISI 304 austenitic stainless steel. Rem: Rev. Esc. Minas [online]. 2009, vol.62, n.1, pp. 53-58. ISSN 0370-4467.  http://dx.doi.org/10.1590/S0370-44672009000100008.

Austenitic stainless steels specimens were deformed by tension from 0.03 to 0.12 of true strain at -50ºC and -10ºC, in order to obtain different volumetric fractions of e and α' strain induced martensites. The morphology, distribution and volumetric fractions of the strain induced martensites were characterized by metallography and dilatometry analysis and quantified by ferrite detector measurements. The reverse transformation temperatures of ε→γ and α'→γwere detected by dilatometry tests. The e and α' martensites reversion was observed in the temperature range of 50-200ºC and 500-800ºC, respectively. The heating rate did not influence the reversing of ε→α' temperatures but did affect the α'→γtransformation temperatures.

Palabras llave : Austenitic stainless steel; strain-induced martensite; dilatometry; continuous heating diagram.