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).
Pfeil, Carnegie Schol. Mem., 16, 153 (1927).
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Jones, E. R. W., unpublished work.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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