Hot deformation study by processing maps of N containing microalloyed steel

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

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandBegutachtung

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.

Originalspracheenglisch
TitelTMS Annual Meeting
Herausgeber (Verlag)John Wiley & Sons, Inc
Seiten503-510
Seitenumfang8
ISBN (Print)9781118291221
DOIs
PublikationsstatusVeröffentlicht - 2012
VeranstaltungTMS 2012 Annual Meeting and Exhibition - Orlando, Fla., USA / Vereinigte Staaten
Dauer: 11 Mär 201215 Mär 2012

Konferenz

KonferenzTMS 2012 Annual Meeting and Exhibition
LandUSA / Vereinigte Staaten
OrtOrlando, Fla.
Zeitraum11/03/1215/03/12

ASJC Scopus subject areas

  • Physik der kondensierten Materie
  • Werkstoffmechanik
  • Metalle und Legierungen

Fields of Expertise

  • Advanced Materials Science

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