Mechanical Alloying of Premixed δ and γ Stainless Steel Powders with a Tie Lined Chemical Compositions

Yuuji Kimura, Masatomo Kamada, Setsuo Takaki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Mechanical alloying process of the mixture of ferritic(δ) and austenitic(γ) stainless steel powders has been investigated by means of X-ray diffraction and EPMA line analysis. The chemical compositions of δ and γ powders used is Fe-27mass%Cr-7mass%Ni and Fe-20mass%Cr-12mass%Ni, respectively, which are equilibrium compositions of δ and γ phase at 1473K. The γ phase in the premixed (δ+γ) powders changes to bcc phase with ballmilling treatment and this phase change is promoted by increasing the volume fraction of δ powder. The structure of γ -70vol%δ premixed powder is of full bcc single phase after 360ks ball-milling treatment. However, EPMA line analysis in premixed (δ+γ) powders with 360ks ball-milling treatment shows the inhomogeneity of the chemical composition of Cr and Ni, while the structure is of bcc single phase. The inhomogeneity of chemical composition is deeply related to the phase transformation of γ. The structural change to bcc phase is mainly due to the deformation induced transformation of γ to bcc martensite and partially due to the mechanical alloying at the interface between δ and γ phase.

Original languageEnglish
Pages (from-to)315-319
Number of pages5
JournalJournal of the Japan Society of Powder and Powder Metallurgy
Volume40
Issue number3
DOIs
Publication statusPublished - Jan 1 1993

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Stainless Steel
Mechanical alloying
Powders
Stainless steel
Chemical analysis
Ball milling
Electron probe microanalysis
Austenitic stainless steel
Martensite
Volume fraction
Phase transitions
X ray diffraction

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Mechanical Alloying of Premixed δ and γ Stainless Steel Powders with a Tie Lined Chemical Compositions. / Kimura, Yuuji; Kamada, Masatomo; Takaki, Setsuo.

In: Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 40, No. 3, 01.01.1993, p. 315-319.

Research output: Contribution to journalArticle

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