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    • Fatigue crack growth retardation in spot heated mild steel sheet

      B B Verma P K Ray

      Alloys and Steels Volume 25 Issue 4 August 2002 pp 301-307

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/025/04/0301-0307

    • Keywords

       

      Spot heating; overloading; fatigue crack growth retardation; residual stress; delay cycles.

    • Abstract

       

      A fatigue crack can be effectively retarded by heating a spot near the crack tip under nil remote stress condition. The subcritical spot heating at a proper position modifies the crack growth behaviour in a way, more or less, similar to specimen subjected to overload spike. It is observed that the extent of crack growth retardation increases with increasing level of overload as well as with increasing spot temperature. It is also observed that modification in crack growth behaviour is a function of location of heating spot and maximum retardation is observed at + 5 position.

    • Author Affiliations

       

      B B Verma1 P K Ray2

      1. Department of Metallurgical Engineering, Regional Engineering College, Rourkela 769 008, India
      2. Department of Applied Mechanics and Hydraulics, Regional Engineering College, Rourkela 769 008, India

    • Dates

       
      Published
      August 2002
      Manuscript received
      29 November 2001
      Manuscript revised
      24 June 2002

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