Effect of Small and Large Amounts of Prestrain at 295K on Tensile Properties at 77K of 304 Stainless Steel

• IINO Yutaka

抄録

Small amounts of prestrain at 295K (0.005<ε₂₉₅<0.08) decrease the yield strength σ_0.2 at 77K. When ε₂₉₅=0.01, σ_0.2 is ∼60MPa lower than that with no prestrain. X-ray diffraction analysis showed that the decrease of σ_0.2 is due to more formation of ε martensite just at and after yield in the prestrained specimen. Large amounts of prestrain (0.1<ε₂₉₅<0.454) increase σ_0.2 and cause the yield plateau of the load-elongation curve. The yield plateau is attributed to the existence of a transition zone (3-8mm long, depending on prestrain) in the gauge length, where deformation occurs and a burst of α martensite transformation takes place. The transition zone propagates through the gauge length during the yield plateau. An explanation is given for the surface upheaval in a machined flange which has been cryogenically serviced.

収録刊行物

• JSME international journal. Ser. 1, Solid mechanics, strength of materials

  JSME international journal. Ser. 1, Solid mechanics, strength of materials 35 (3), 303-309, 1992

  一般社団法人 日本機械学会

キーワード

• Tensile Properties
• Yield Strength
• Prestrain
• Martensite Transfor mation
• Yield Plateau Deformation

詳細情報

• CRID: 1390001205431574656
• NII論文ID: 110002347688
• NII書誌ID: AA10680585
• DOI: 10.1299/jsmea1988.35.3_303
• ISSN: 09148809
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1988/35/3/35_3_303/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可