Abstract
The low temperature tensile properties of undoped specimens and specimens doped with up to 55 wt.ppm C before and after aging at 600 or 1500°C were examined. Carbon doping from 14 to 30 wt.ppm induced a remarkable improvement in ductility, as shown by a sharp increase in σ c and a sharp decrease in T c . Aging at 600°C induced a slight decrease in ductility for all doped specimens, whilst aging at 1500°C induced no monotonie changes in ductility. The latter result was interpreted by considering thermodynamics and decarburizing during aging.
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