Abstract
THE martensite reaction in steels has been studied by microscopic examination of polished and etched samples after the samples have been tempered for short periods of time. One etching reagent which has been used is a solution of 6 per cent nitric acid in alcohol, which is called 6 per cent nital. This etchant stains the martensite grey or black and leaves the austenite white.
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References
Cohen, J. B., Hurlich, A., and Johnson, M., Trans. Amer. Soc. Met., 39, 109 (1947).
Averbach, B. L., Sc.D. Thesis, Department of Metallurgy, Massachusetts Institute of Technology (September 1947).
Howard, R. T., and Cohen, M., Amer. Inst. Met. Eng., Tech. Pub. No. 2215, Metals Technology (August 1947).
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HARRIS, W. Comparison of Metallographic and X-Ray Measurements of Retained Austenite. Nature 161, 315–316 (1948). https://doi.org/10.1038/161315b0
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DOI: https://doi.org/10.1038/161315b0
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