Observation of Local Deformation and Crack Initiation in High-Cycle Torsional Fatigue of Carbon Steel Plain Specimen by Electron Microscope

• NISITANI Hironobu

  Faculty of Engineering, Kyushu University

• FUKUDAH Takayuki

  Sasebo College of Technology

抄録

High-cycle torsional fatigue tests were carried out on carbon steel plain specimens (S45C). Local deformation in the crack initiation process was observed by an electron microscope. Fine grid lines were drawn on the specimen surface with a diamond point needle. The lines were fine enough not to influence the structure of the slip bands. The local strains were measured from the distorted grids. Cracks were generated in the area having large local deformation of several hundred % shearing strain. This occurs in the grain boundary between pearlite and ferrite or in the ferrite crystal grain sandwiched between pearlites.

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), 354-360, 1992-07-15

  一般社団法人日本機械学会

キーワード

• Fatigue
• Torsion
• Iron and Steel
• High-Cycle Torsional Fatigue
• Carbon Steel
• Crack Initiation
• Local Deformation
• Slip Band
• Grid Lines
• Electron Microscope
• Crystal Grain Boundary
• Strain Concentration

詳細情報

• CRID: 1572261552050422144
• NII論文ID: 110002347695
• NII書誌ID: AA10680585
• ISSN: 09148809
• 本文言語コード: en
• データソース種別:
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