Evaluation of Fracture Toughness by Stretched Zone Method in Machine Structural Steels by
نویسندگان
چکیده
The elastic-plastic fracture toughness JIc tests by the stretched zone method were performed to obtain JIc values for machine structural steels. The validity of the JIc values obtained was evaluated, and the effects of the heat treatment conditions and microstructure of steels on the JIc values were investigated by use of streched zone width, SZW. The results obtained are summarized as follows. (1) The inclination of the blunting line in SZW versus J curve is hardly affected by the condition of heat treatment for SCM440 steels, while it is affected obviously for S45C steels.
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