EFFECT OF TEMPERATURE ON MICROSTRUCTURE EVOLUTION IN TRIP/TWIP STEELS DURING TENSILE DEFORMATION BY ACOUSTIC EMISSION DATA

  • Mikhail Leonidovich Linderov
  • Christian Segel
  • Alexei Iurevich Vinogradov
  • Anja Weidner
  • Horst Biermann

Abstract

The model austenitic stainless steels with TRIP/TWIP effect have an excellent combination of mechanical characteristics such as strength and ductility.  Outstanding mechanical properties of these materials are associated with the complex interplay between  several mechanisms involved into deformation on different stage in various combinations:  dislocation slip, martensitic transformation and twinning. To get a better insight into kinetics of these deformation processes in Fe-Cr-Mn-Ni steels with different content of Ni (3 and 9%) at different temperatures (ambient and 373 K) we employed an acoustic emission (AE) technique powered by a new algorithm of cluster analysis and advanced microstructural characterization after uniaxial tensile deformation to fracture.
Section
Technical Sciences