Torsional Fatigue Properties of Pre-strained Low and Medium Carbon Steels

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  • Zhou Congling
    Graduate School of Science and Engineering
  • Nishida Shin-ichi
    Department of Mechanical Engineering, Faculty of Science and Engineering, Saga University
  • Hattori Nobusuke
    Department of Mechanical Engineering, Faculty of Science and Engineering, Saga University

Abstract

In the present study, torsional fatigue properties of tensile pre-strained structural carbon steels have been investigated in view-point of fatigue strength, crack initiation and propagation behavior, hardness and so on. According to the experimental results, tensile pre-strain improves the torsional fatigue strength, increases the surface hardness and affects the crack initiation and propagation characteristics.

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