Crack Nucleation Mechanism of Austempered Ductile Iron during Tensile Deformation

• Yajima Zenjiro

  Advanced Materials Science Research and Development Center, Kanazawa Institute of Technology

• Kishi Yoichi

  Advanced Materials Science Research and Development Center, Kanazawa Institute of Technology

• Shimizu Ken’ichi

  Advanced Materials Science Research and Development Center, Kanazawa Institute of Technology

• Mochizuki Hideharu

  Sugiyama Co., Ltd.

• Yoshida Toshiki

  Industrial Property Cooperation Center

抄録

The relationship between the crack nucleation and stress-induced martensitic transformation in the retained massive austenites (RM-γ’s) of austempered ductile irons (ADIs) was examined in detail by carrying out tensile tests and scanning electron microscope (SEM) observations for an ADI material. The SEM observations revealed that cracks were not nucleated in the peripheral regions of graphite nodules but were nucleated in the RM-γ’s. Surface relief due to stress-induced martensitic transformation was observed near the cracks in the RM-γ’s, and it was also observed in the RM-γ’s in which cracks were not visible. For this reason, the cracks were concluded to be nucleated mainly in the RM-γ’s subjected to stress-induced martensitic transformation.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 47 (1), 82-89, 2006

  公益社団法人 日本金属学会

キーワード

• austempered ductile iron
• retained massive-γ
• stress-induced martensitic transformation
• surface relief
• transformation-induced plasticity

詳細情報

• CRID: 1390282679227352448
• NII論文ID: 130004452940
• NII論文ID: 10017151260
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.47.82
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 7772949
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7772949
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/47/1/47_1_82/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可