Influence of titanium addition on the microstructure of the novel ferrous-based stainless steel

Chia Cheng Lin, Li Hsiang Lin, Jing Ming Hung, Yung Hsun Shih, Ching Zong Wu, Keng Liang Ou, Chih Yeh Chao

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The microstructural characteristics of the Fe-9Al-30Mn-1C-5Ti (wt.%) alloy were determined by scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectrometry. The microstructure of the alloy was essentially a mixture of (γ + TiCx + (α + B2 + DO3)) phases during solution treatment between 950 °C and 1150 °C. The TiCx carbide had a face-center-cubic structure with a lattice parameter a of 0.432 nm. When the as-quenched alloy was subjected to aging treatment at temperatures of 450-850 °C, the following microstructural transformation occurred: (γ + TiCx + κ + (α + DO3)) → (γ + TiCx + κ + (α + B2 + DO3 + TiCx)) → (γ + TiCx + κ + κ′ + (α + B2 + DO3)) → (γ + TiC x + (α + B2 + DO3)). Addition of Ti promotes the formation of the α phase at high temperatures.

Original languageEnglish
Pages (from-to)9038-9044
Number of pages7
JournalJournal of Alloys and Compounds
Volume509
Issue number37
DOIs
Publication statusPublished - Sep 15 2011

Keywords

  • Fe-Al-Mn-C-Ti alloy
  • Microstructure
  • Phase transformation
  • TiC carbide

ASJC Scopus subject areas

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

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