On pinning effect of austenite grain growth in Mg-containing low-carbon steel

Chi Kang Lin, Yen Hao Su, Weng Sing Hwang, Guan Ru Lin, Jui Chao Kuo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The pinning effect of adding the microalloying element Mg on the growth of austenite grain for low-carbon steel was investigated in this study. The grain growth pinning behaviour of austenite was observed in situ at high temperature using a high-temperature confocal scanning laser microscope at 1573 K for 300 s. The average austenite grain size was calculated using optical micrograph Leica software. In situ observation showed that the finely dispersed Mg inclusions can inhibit the boundary migration of austenite grains. MgO–MnS is the most effective inclusions for pinning of austenite grain boundaries in Mg-containing SS400, and the ratios of inclusion on austenite grain boundaries to the total inclusion are 43%. In addition, the increase in Mg addition reduces the grain mobility.

Original languageEnglish
Pages (from-to)596-606
Number of pages11
JournalMaterials Science and Technology (United Kingdom)
Volume34
Issue number5
DOIs
Publication statusPublished - 2018 Mar 24

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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