Changes in Residual Stress in Low Carbon Stainless Steel for Nuclear Reactor Usage Suffered from Deformation and Aging

• Ohnishi Yoko

  Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo

• Fujio Kazuki

  Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo

• Kakutani Eigo

  Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo

• Yamamoto Atsushi

  Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo

• Tsubakino Harushige

  Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo

• Terasawa Mititaka

  Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo

Bibliographic Information

Other Title

• 加工後時効熱処理を施した原子炉用低炭素ステンレス鋼の時効析出と残留応力の変化
• カコウゴ ジコウ ネツ ショリ オ ホドコシタ ゲンシロヨウ テイタンソ ステンレスコウ ノ ジコウ セキシュツ ト ザンリュウ オウリョク ノ ヘンカ

Abstract

  Changes in residual stress and precipitation phenomena were studied, during aging for an austenitic stainless steel, SUS316L, cold-rolled with various degrees of reduction and surface ground by transmission electron microscopy and synchrotron radiation (SR) diffractmetry. After aging at 573 K, two kinds of precipitates were observed in the cold-rolled specimens. They were identified as M₇C₃ and M₂₃C₆ by SR diffraction and electron diffraction measurements. The precipitate M₇C₃ was formed both in grain interiors and at grain boundaries, while the precipitate M₂₃C₆ was formed in grain interiors. Precipitation was promoted with increasing cold-rolling reduction. Additionally, segregation of phosphorous was expected along grain boundaries. Residual stresses measured at a synchrotron radiation facility, SPring-8, showed that the compressive stress detected in cold-rolled specimens was changed into tensile stress with proceeding of aging. On the other hand, the tensile stress induced by surface grinding was decreased.<br>

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 72 (5), 360-365, 2008

  The Japan Institute of Metals and Materials

Keywords

• SUS316L
• cold-rolling
• surface grinding
• aging
• precipitation
• transmission electron microscopy
• residual stress
• Spring-8

Details

• CRID: 1390001206479978240
• NII Article ID: 10021150339
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet.72.360
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 9514380
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9514380
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/72/5/72_5_360/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed