Abstract
Tin-induced temper embrittlement of 3.5 pct Ni, 1.7 pct Cr steels containing 0.2 and 0.4 pct C was studied by means of notched-bar testing, scanning electron fractography, and Auger electron spectroscopy of isothermally aged specimens. The ductile-brittle transition temperature varied linearly with Sn concentration on grain boundaries at a rate which increased with hardness of the steel. The rate of approach to the steady state level of embrittlement was faster in the higher C steel. The grain boundary concentrations of Ni and Sn bear a unique relationship in a manner analogous to the behavior found previously in Sb-doped steels. The potency of Sn as an embrittling element is somewhat less than that of Sb, but considerably greater than that of P.
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Formerly Research Fellow, Department of Metallurgy and Materials Science, University of Pennsylvania, Philadelphia,PA
Formerly Post Doctoral Fellow, Department of Metallurgy and Materials Science, University of Pennsylvania
H. C. Feng Formerly with the Research Staff, LRSM, University of Pennsylvania
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Cianelli, A.K., Feng, H.C., Ucisik, A.H. et al. Temper embrittlement of Ni-Cr steel by Sn. Metall Trans A 8, 1059–1061 (1977). https://doi.org/10.1007/BF02667390
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DOI: https://doi.org/10.1007/BF02667390