Advances in materials Research

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Fatigue behavior of mechanical structures welded with different filler metal

  • Alioua, Abdelkader (Department of Mechanical Engineering, Laboratory LMSR, University Djilali Liabes Sidi Bel Abbes) ;
  • Bouchouicha, Benattou (Department of Mechanical Engineering, Laboratory LMSR, University Djilali Liabes Sidi Bel Abbes) ;
  • Zemri, Mokhtar (Department of Mechanical Engineering, Laboratory LMSR, University Djilali Liabes Sidi Bel Abbes) ;
  • IMAD, Abdellatif (Laboratory of Mechanics of Lille)
  • Received : 2017.05.16
  • Accepted : 2017.09.18
  • Published : 2017.09.25
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Abstract

This paper describes an investigation on the effect of using three different filler metals on fatigue behavior of mechanical structures welded. The welding is carried out on the steel A510AP used for the manufacture of gas cisterns and pipes. The welding process used is manual welding with coated electrodes and automatic arc welding. Compact tension CT50 specimen has been used. The three zones of welded joint; filler metal FM, heat affected zone HAZ and base metal BM have been investigated. The results show that the crack growth rate CGR is decreasing respectively in BM, FM and HAZ; however, this variation decreases when stress intensity factor SIF increases. For low values of SIF, the CGR is inferior in the over-matched filler metal of which the value of mismatch M is near unity, but for high values of M the CGR is superior, and the effect of the over-matching on CGR becomes negative. No deviation of the crack growth path has been noticed.

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References

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