Influence of processing parameters on the porosity, thermal expansion, and oxidation behavior of consolidated Fe22Cr stainless steel powder


ÖZTÜRK B., Topcu A., CORA Ö. N.

POWDER TECHNOLOGY, vol.382, pp.199-207, 2021 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 382
  • Publication Date: 2021
  • Doi Number: 10.1016/j.powtec.2020.12.072
  • Journal Name: POWDER TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, EMBASE, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.199-207
  • Keywords: Fe22Cr, Powder metallurgy, Porosity, Coefficient of thermal expansion, Oxidation rate

Abstract

The objective of this study was to determine the effects of powder metallurgy process parameters on the porosity, coefficient of thermal expansion, and oxidation behaviors of porous ferritic Fe22Cr stainless steel compacts. Optimum values of the process were also investigated. The results showed that, porosity and the coefficient of thermal expansion decrease with increasing process parameters; and changing powder shape from spherical to flaky at a certain extent. The minimum and maximum porosity values of the samples were recorded as 7% and 30%, respectively. While those for the samples produced from milled powders were noted as 3%, and 19%, respectively. The coefficient of thermal expansion values were measured at 800 degrees C and found to be in the range of 12-14.5 x 10(-6) K-1 for spherical powders and flaky powders. From oxidation kinetics point of view, both process parameters and powder shape influenced the oxidation behavior. (C) 2020 Elsevier B.V. All rights reserved.