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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All Science Journal Classification (ASJC) codes

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

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