二相ステンレス鋼溶接継手部のHESCC感受性とその評価 : 二相ステンレス鋼溶接継手部の水素脆化型応力腐食割れの解析的評価とその機構(第2報)

• 向井 喜彦

  大阪大学工学部

• 村田 雅人

  大阪大学工学部

• 王 静波

  大阪大学大学院

書誌事項

タイトル別名

• A Study of the Susceptilility for HESCC and It's Evaluation in Duplex Stainless Steel Weldaments : Analytical Evaluation of Hydrocen Embrittlemanl Type SCC and It's Mechanism in Duplexs Stainless Steel Weldments

抄録

In this paper the authers discussed the effect of microstructure and residual stress on the susceptibility to HESCC in TIG and EBW duplex stainless steel weld metals. It was found that weld metal has a remarkable susceptibility to HESCC than base metal because of the ferrite content increasing in weld metal and the discontinuous precipitation of austenitic phase in ferritic phase in TIG and EBW weld metal, which results in the decreasing of keying effect of austenitic phase on crack propagation. Crack growth rate in EBW weld metal was found to be faster than that in TIG weld metal, although their threshold stresses were almost the same. In addition to that, the existence of residual stress increased the susceptibility to HESCC in welded joint, especially in the welded joint of cold worked material.

収録刊行物

• 溶接学会論文集 : quarterly journal of the Japan Welding Society

  溶接学会論文集 : quarterly journal of the Japan Welding Society 9 (3), 61-67, 1991-08-05

  社団法人溶接学会

キーワード

• Duplex stainless steel
• weld metal
• HESCC
• residual stress crack growth rate
• threshold stress
• cold worked materials

詳細情報

• CRID: 1573668927161051264
• NII論文ID: 110003423726
• NII書誌ID: AN1005067X
• ISSN: 02884771
• 本文言語コード: ja
• データソース種別:
  • CiNii Articles