Effect of Nitrogen and Deformation Twinning on Tensile Properties of Austenitic Stainless Steels Fabricated by Metal Injection Molding

DOI Web Site 1 Citations 28 References

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Other Title
  • 金属粉末射出成形で作製したオーステナイト系ステンレス鋼の引張特性に及ぼす窒素添加と変形双晶の影響
  • キンゾク フンマツ シャシュツ セイケイ デ サクセイ シタ オーステナイトケイ ステンレス コウ ノ ヒッパリ トクセイ ニ オヨボス チッソ テンカ ト ヘンケイソウショウ ノ エイキョウ
Published
2009
DOI
  • 10.2497/jjspm.56.98
Publisher
Japan Society of Powder and Powder Metallurgy

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Description

High nitrogen stainless steel (Fe-17Cr-12Mn-3Mo-1N) fabricated by metal injection molding (MIM) method has prominent strength and ductility. However, the tensile properties are unexplainable only by the influence of nitrogen solid solution strengthening. In this study, to clarify it, we have examined tensile-deformed microstructure. Strength of high nitrogen stainless steel was three times as high as that of SUS316L, without losing ductility, and micro-deformation twinnings were observed for the steels tensile-fractured at room temperature. It is thought that high strength with high ductility of this steel is attributed to solid solution strengthening of nitrogen and the formation of deformation twinning.

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