Improving the impact toughness properties of high carbon powder metallurgy steels with novel spherical cementite in the bainitic matrix (SCBM) microstructures


Güral A., Altuntaş O.

Materials Chemistry and Physics, vol.259, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 259
  • Publication Date: 2021
  • Doi Number: 10.1016/j.matchemphys.2020.124203
  • Journal Name: Materials Chemistry and Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Powder processing, Microstructure, Spheroidizing, Austempering, Impact behaviour
  • Gazi University Affiliated: Yes

Abstract

© 2020Spherical cementite in the bainitic matrix (SCBM) microstructures in the high carbon powder metal steels having 1.5 wt% C were achieved in specimens with the spherical cementite in the ferritic matrix microstructures by isothermal annealing in a salt bath at 350 °C after annealing at 750 °C. The toughness properties of the specimens with SCBM microstructures were compared with pearlitic plus primary cementite, fully martensitic plus tempering, and the spherical cementite particles in the ferritic matrix microstructures. The toughness properties of specimens having SCBM microstructures have been improved by 300% and 80% compared to specimens having other microstructures.