Abstract
The effect of the grain sizel of commerical nickel on the lower yield point, σy, and flow stress, σ f , has been investigated. From the relationship between σy andl −1/2 and between σ f andl −1/2, and also by extrapolation, the parameters σ1(σ fi ) and ky(kf), which occur in Petch's well-known expression, were determined. It was found that the values of these parameters depend on the previous history of the samples. It is suggested that the more marked dependence of the deformation resistance of nickel on grain size arising from certain thermal treatments is due to the segregation of impurities to the grain boundaries. It is shown that this is in accord with the presence of grain-boundary hardening and with its dependence on quenching temperature.
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Karavaeva, V.V., Sukhovarov, V.F. The effect of grain size on the deformation resistance of nickel. Soviet Physics Journal 8, 25–31 (1965). https://doi.org/10.1007/BF00868540
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DOI: https://doi.org/10.1007/BF00868540