Abstract
The Rockwell C hardnesses of thirteen high-purity iron-carbon alloy specimens that had been brine-quenched from temperatures in the austenite region to room temperature were measured. The hardness versus wt % C curve exhibits a maximum value of ∼ 65.5 Rc near 0.9% C. The decrease in hardness at carbon concentrations >0.9% is the result of a rapid increase in the volume fraction of retained austenite. Attention is called to the desirability of using these or similar data in materials texts to illustrate this structure-property relationship.
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Litwinchuk, A., Kayser, F.X., Baker, H.H. et al. The Rockwell C hardness of quenched high-purity iron-carbon alloys containing 0.09 to 1.91% carbon. J Mater Sci 11, 1200–1206 (1976). https://doi.org/10.1007/BF00545136
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DOI: https://doi.org/10.1007/BF00545136