Abstract
THE accompanying photograph (Fig. 1) represents the side of a steel bar. The bar was first marked by a punch in the way shown, and the punch marks were afterwards completely filed out. The side was then polished and the bar pulled in a testing machine beyond the elastic limit of the material. The polished surface was gradually destroyed everywhere except just under the punch marks, where the overstrained material retained its polish and the marks again became evident. In the strained bar the marks remain distinctly raised above the rest of the surface. A similar experiment was made with a shorter bar that was afterwards subjected to compression along its length. Again the punch marks became clearly visible, but this time they remained as polished depressions instead of raised surfaces.
Similar content being viewed by others
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
CHAPMAN, R. Demonstration of Strain-hardening of Steel. Nature 94, 589 (1915). https://doi.org/10.1038/094589c0
Issue Date:
DOI: https://doi.org/10.1038/094589c0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.