Ultrafast heating of advanced high strength steels

Roumen H. Petrov, Athina Puype, Dorien De Knijf, Leo Kestens

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)

Abstract

Microstructure, texture and the tensile properties of a 70% cold rolled advanced high strength steel with microstructure of ferrite and pearlite were studied after reheating with different heating rates and subsequent quenching. Sub-size tensile samples were reheated with rates of 10, 500 and 1000°C/s to temperatures between Ac1 and Ac3 and above Ac3 and subsequently quenched without isothermal soaking and with isothermal soaking of 30 s and 60s. By following the microstructure and texture changes it was found that after reheating with 500°C and 1000°C the recrystallization was suppressed and the alpha-gamma phase transformation starts in a nonrecrystallized or partially recrystallized matrix. Significant grain refinement and increase of both tensile strength and elongation was observed in the samples after ultrafast heating and subsequent quenching without isothermal soaking. The isothermal soaking erased the grain refining effect of the ultrafast heating even if it was as short as 30s.

Original languageEnglish
Title of host publicationPTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
EditorsL.-Q. Chen, M Militzer, G. Botton et al
PublisherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
Pages1157-1158
ISBN (Electronic)9780692437360
Publication statusPublished - 2015
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 - Whistler, Canada
Duration: 28 Jun 20153 Jul 2015

Conference

ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015
Abbreviated titlePTM 2015
CountryCanada
CityWhistler
Period28/06/153/07/15

Keywords

  • Advanced high strength steel
  • Grain refinement
  • Phase transformation
  • Recrystallization
  • Ultra-fast heating

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    Petrov, R. H., Puype, A., De Knijf, D., & Kestens, L. (2015). Ultrafast heating of advanced high strength steels. In L-Q. Chen, M. Militzer, & G. Botton et al (Eds.), PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015 (pp. 1157-1158). International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015.