Formula relating fracture strength and fracture ductility with strength coefficient and strain-hardening exponent

摘要

To theoretically calculate the strength coefficient and the strain-hardening exponent with conventional mechanical property parameters, formulas relating them with fracture strength and fracture ductility are studied using test data for ten alloys. The applicability of the traditional formula relating these four material constants is discussed first, and then new formulas are proposed based on the premise that the traditional approach cannot be used. The main conclusions made herein are that only under certain conditions can be traditional formula be used to describe the relationship among fracture strength, fracture ductility, strength coefficient, and strain-hardening exponent; otherwise, a new formula must be used.