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Corrosion behavior of friction stir processed AISI 430 ferritic stainless steel

Materials Research Express, ISSN: 2053-1591, Vol: 6, Issue: 8
2019
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  • 11
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    8
    • Citation Indexes
      8
  • Captures
    11

Article Description

Friction stir processing (FSP) of AISI 430 steel was carried out using a WC-based tool at a rotation speed of 1400 rpm and travel speeds of 16, 40 and 60 mm min. Sound defect-free specimen was achived at travel speed of 16 mm min. The microstructural evaluations revealed that FSP led to a very fine grained duplex structure of martensite and ferrite. FSP deteriorated the corrosion resistance of the 430 ferritic stainless steel. The cyclic polarization tests showed that no pitting corrosion occurred in 0.1 M HSO for both base metal and FS processed specimens. In contrast, the FS processed specimen exhibited a wider positive hysteresis loop, evidencing the higher pitting corrosion susceptibility, as compared to the base metal in 0.1 M HSO + 0.1 M NaCl solution.

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