Grain boundary engineering of 10% Cr ferritic-martensitic steel SUH3

Kyosuke Hirayama, Yonosuke Yoshii, Yasuhiro Morizono, Sadahiro Tsurekawa, Yasuyosi Hidaka

Research output: Contribution to journalArticle

Abstract

Thermomechanical treatments for manipulating grain boundary microstructure in 10 wt%Cr ferriticmartensitic steel SUH3 have been studied. Material with a high fraction of coincidence site lattice (CSL) boundaries was successfully produced and subjected to steam oxidation tests to demonstrate the utility of grain boundary engineering. Introducing a high fraction of twin boundaries in austenite resulted in a significant increase in the number of CSL boundaries along the prior austenite grain boundaries in martensite. In addition, grain boundary engineering introduced a high density of subblock structures in martensite, which resulted in a homogeneous distribution of fine precipitates in tempered martensite. Steam oxidation tests demonstrated that grain boundary engineering for SUH3 steel can achieve enhanced oxidation resistance.

Original languageEnglish
Pages (from-to)1973-1979
Number of pages7
Journalisij international
Volume55
Issue number9
DOIs
Publication statusPublished - Jan 1 2015

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Martensitic steel
Ferritic steel
Grain boundaries
Martensite
Steel
Steam
Austenite
Oxidation
Thermomechanical treatment
Oxidation resistance
Precipitates
Microstructure

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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Grain boundary engineering of 10% Cr ferritic-martensitic steel SUH3. / Hirayama, Kyosuke; Yoshii, Yonosuke; Morizono, Yasuhiro; Tsurekawa, Sadahiro; Hidaka, Yasuyosi.

In: isij international, Vol. 55, No. 9, 01.01.2015, p. 1973-1979.

Research output: Contribution to journalArticle

Hirayama, Kyosuke ; Yoshii, Yonosuke ; Morizono, Yasuhiro ; Tsurekawa, Sadahiro ; Hidaka, Yasuyosi. / Grain boundary engineering of 10% Cr ferritic-martensitic steel SUH3. In: isij international. 2015 ; Vol. 55, No. 9. pp. 1973-1979.
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