Abstract
WHEN a ball is pressed into a plane metal surface, it has been shown1 that the relation : holds between the load L (kgm.) and d (mm.) the recovered diameter of the impression in the material. Both n (Meyer index) and α are constants which are dependent upon the material and its condition (annealed, cold-worked, etc.). The constant α also depends upon the size of the ball, whereas n does not.
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References
Meyer, Z., V.D.I., 645, 750, 835 (1908).
O'Neill, "The Hardness of Metals and its Measurement" (London).
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Norbury, J. Inst. Met., 29, 407 (1923).
O'Neill and Cuthbertson, J. Inst. Met., 46, 273 (1931).
Schwarz, Forschungsarbeiten (1929).
Jones, E. R. W., unpublished work.
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FINNISTON, H., JONES, E. & MADSEN, P. Meyer Analysis of Metals. Nature 164, 1128–1129 (1949). https://doi.org/10.1038/1641128b0
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DOI: https://doi.org/10.1038/1641128b0
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