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<p>Lean duplex stainless steels have corrosion resistance similar to austenitic grades, with superior mechanical strength. This work investigated the <i>α</i>’ martensite transformed by cold rolling with Von Mises equivalent deformation equal to 0.74. Specimens etched with Behara’s solution resulted in images with good contrast between austenite, martensite, and ferrite, as observed in the light optical, scanning electron, and atomic force microscopes. The amount of <i>α</i>’ formed was quantified by magnetic saturation measurements and was found to be 18.5%. Cold work resulted in a more pronounced hardening of austenite than that of ferrite. Microhardness measurement of the <i>α</i>’ phase revealed that this martensitic phase has a hardness much higher than the ferrite and austenite phases.</p>

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Investigation of Strain-Induced Martensite in Lean Duplex Stainless Steel UNS S32101

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • S. S. M. Tavares,
  • I. M. V. Silva,
  • A. R. Pimenta,
  • M. A. V. Heringer,
  • J. M. Pardal

摘要

Lean duplex stainless steels have corrosion resistance similar to austenitic grades, with superior mechanical strength. This work investigated the α’ martensite transformed by cold rolling with Von Mises equivalent deformation equal to 0.74. Specimens etched with Behara’s solution resulted in images with good contrast between austenite, martensite, and ferrite, as observed in the light optical, scanning electron, and atomic force microscopes. The amount of α’ formed was quantified by magnetic saturation measurements and was found to be 18.5%. Cold work resulted in a more pronounced hardening of austenite than that of ferrite. Microhardness measurement of the α’ phase revealed that this martensitic phase has a hardness much higher than the ferrite and austenite phases.