Hot deformation study by processing maps of N containing microalloyed steel

M. Dikovits*, Maria Cecilia Poletti, F. Warchomicka, G. P. Chaudhari, V. Pancholi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The hot formability of a microalloyed steel with 0.16 wt-%C modified with N is studied by using processing maps. Compression tests of cylindrical samples are carried out using a Gleeble®3800 simulator in the range of temperature between 750 - 1000°C and strain rates between 0.01-100 s -1. For this alloy, an A r3-temperature about 740°C is determined by means of dilatometry. Processing maps are calculated using the modified dynamic material model developed by Murty and Rao for different logarithmic strains. For the instability map, the parameter κ j developed by the authors in previous works is used and compared with other instability values. Softening in the flow curves provoked by induced ferrite during deformation at low temperatures and low strain rates is reflected in the η-value. Light optical microscopy (LOM) and electron back scattered diffraction (EBSD) measurements are used to study the microstructure of the hot deformed samples to determine the deformation mechanisms active and to verify the processing maps.

Original languageEnglish
Title of host publicationTMS Annual Meeting
PublisherJohn Wiley & Sons, Inc
Pages503-510
Number of pages8
ISBN (Print)9781118291221
DOIs
Publication statusPublished - 2012
EventTMS 2012 - Orlando, Fla., United States
Duration: 11 Mar 201215 Mar 2012

Conference

ConferenceTMS 2012
CountryUnited States
CityOrlando, Fla.
Period11/03/1215/03/12

Keywords

  • Hot deformation
  • Microalloyed steel
  • Processing maps

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Fields of Expertise

  • Advanced Materials Science

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