On the Formation of Striation on the High-Temperature Low-Cycle Fatigue Fracture Surface of Type 316 Austenitic Stainless Steel

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概要

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• The mechanism of formation of striations on the fatigue fracture surface is considered from a crystallographical point of view for striations observed by scanning electron microscopy on a Type 316 stainless steel fractured by low-cycle fatigue at high temperatures. It is observed that striations change their directions abruptly and regularly at parallel lines which are considered to be twin boundaries. The directions of striations in relation to twin boundaries and the stereographic relation of the neighbouring fracture surfaces are obtained. Straight interstriation markings parallel to the main striations are sometimes observed. In some regions striations with sharp saw-toothed edges and saw-toothed interstriation markings are also observed. One part of these striations is considered to be formed by Pelloux's mechanism. The other part is considered to be formed by a mechanism that premised deformation zones consisting of cross slip planes in front of the crack.

• 一般社団法人日本機械学会の論文

著者

• KANAZAWA Kenji

  National Institute of Bioscience and Human-Technology, AIST

• Kanazawa Kenji

  National Research Institute For Metals

• YOSHIDA Susumu

  Head of Fatigue Testing Division.

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• On the Formation of Striation on the High-Temperature Low-Cycle Fatigue Fracture Surface of Type 316 Austenitic Stainless Steel

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