Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel

Masayuki Yamamoto, Ryosuke Ochi, Kyono Yasuda, Masatoshi Aramaki, Shinji Munetoh, Osamu Furukimi

研究成果: ジャーナルへの寄稿記事

抄録

The effect of austenite (γ) phase stability in the local deformation region on the deformation energy of ferrite (α)-γ duplex stainless steel is investigated using tensile testing. The uniform deformation energy values of both the γ-stable and unstable duplex stainless steels are similar, while the local deformation energy of γ-stable duplex stainless steel is larger than that of γ-unstable duplex stainless steel. In γ-unstable duplex stainless steel, the difference in nano-indentation hardness between the α and transformed martensite (α) phases increases remarkably beneath the fractured surface. Low-voltage electron microscopy observations reveal that voids grow rapidly at the grain boundaries between the α and α phases beneath the fractured surface, resulting in a decrease in the local deformation energy in γ-unstable duplex stainless steel.

元の言語英語
ページ(範囲)1379-1385
ページ数7
ジャーナルMaterials Transactions
58
発行部数10
DOI
出版物ステータス出版済み - 1 1 2017

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Phase stability
Stainless Steel
stainless steels
Stainless steel
energy
Tensile testing
Nanoindentation
nanoindentation
austenite
martensite
Martensite
Austenite
low voltage
Electron microscopy
Ferrite
voids
ferrites
electron microscopy
Grain boundaries
hardness

All Science Journal Classification (ASJC) codes

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

これを引用

Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel. / Yamamoto, Masayuki; Ochi, Ryosuke; Yasuda, Kyono; Aramaki, Masatoshi; Munetoh, Shinji; Furukimi, Osamu.

:: Materials Transactions, 巻 58, 番号 10, 01.01.2017, p. 1379-1385.

研究成果: ジャーナルへの寄稿記事

Yamamoto, Masayuki ; Ochi, Ryosuke ; Yasuda, Kyono ; Aramaki, Masatoshi ; Munetoh, Shinji ; Furukimi, Osamu. / Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel. :: Materials Transactions. 2017 ; 巻 58, 番号 10. pp. 1379-1385.
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