Analysis of the relationship of crack arrest effects with fusion zone size by current detour and Joule heating

Jing Yu, Hongchao Zhang, Dewei Deng, Qianqian Liu, Shengzhi Hao

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Specimens of UNS S 31600 stainless steel with precast crack were treated under different discharge parameters. An elliptic hole formed ahead of the crack tip and the thermal compressive stress caused during electropulsing treatment cause the crack arresting. The factors affecting the curvature radius of the crack tip were studied. The crack arrest effect was examined by tensile test and fatigue test. Scanning electron microscopy (SEM), electro backscatter diffraction (EBSD), and transmission electron microscope (TEM) were employed to examine the changes of specimen before and after the treatment. The local recrystallization occurred around the crack tip. The experimental results indicate that the curvature radius of the crack tip is proportional to discharge parameter and crack length. The relationship between discharge parameter and the effectiveness of crack arrest can be obtained.

Original languageEnglish
Pages (from-to)1465-1474
Number of pages10
JournalInternational Journal of Advanced Manufacturing Technology
Volume87
Issue number5-8
DOIs
StatePublished - Nov 1 2016

Keywords

  • Crack arrest
  • Fusion zone size
  • Joule heating
  • Remanufacturing

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