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The reversion of martensite to austenite in certain stainless steels

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Abstract

An investigation has been made of the reversion of martensite (α′) to austenite (γ) in two stainless steels (i) Fe-16 wt% Cr-12 wt% Ni (of low interstitial content) (ii) Fe-15 wt% Cr-8 1/2 wt% Ni-2 wt% Mo-0.09 wt% C. The alloys were refrigerated to produce ∼ 12 to 15% martensite (α′) and then heated for short times at various temperatures ranging from below A s to above A f. With rapid heating the reversion of α′ to γ occurs largely by a shear mechanism. In the Fe-16Cr-12Ni alloy individual grains of α′ transform to grains of reversed γ of similar size and shape. In the carbon-containing alloy there is evidence of break-up of the α′ grains on reversion. An increase in the strength results from reversion and this is attributable mainly to the high dislocation density of the reversed γ.

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Smith, H., West, D.R.F. The reversion of martensite to austenite in certain stainless steels. J Mater Sci 8, 1413–1420 (1973). https://doi.org/10.1007/BF00551664

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Keywords

  • Polymer
  • Stainless Steel
  • Austenite
  • Martensite
  • Dislocation Density