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Abstract

Rotating cantilever fatigue tests were made on two vacuum-arc remelted casts of S82 (4%Ni) steel which had been preheated andforged to give a 25% reduction at 1060°, 1260°, 1300°, or 1340°C and then fully heat treated. Statistical analysis was applied to the results. Impact, tensile, fracture toughness, and stress corrosion resistance tests were carried out,. measurements of fatigue crack growth rate and a study offatigue crack initiation were also made. The tests showed that overheating, including fairly severe overheating, had no significant detrimental effect on fatigue properties, tensile strength, and fracture toughness but that it caused reductions in tensile ductility, impact toughness, and stress corrosion resistance.

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Effect of overheating on fatigue strength and other mechanical properties of carburized and uncarburized VAR 582 steel

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