Applications of Fracture Toughness Parameters to Structural Metals |
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Absorbed Energy aging air-cooled AISI amounts analysis As-Quenched ASTM austenite bainite behavior brittle fracture burst test carbides cementite cleavage fracture composition copper crack growth rate crack length crack propagation critical thickness curves diffraction dimpled rupture directly-aged DMLD Drop Weight ductile effect electron ELONGATION experimental alloys failure FATT flasks flaws frac Fractographic fracture mechanics fracture stress fracture surfaces fracture toughness ft lbs grain boundaries hardenability heat treatment heat-affected zone high strength inch increase initiated intergranular fracture ksi Vin loading longitudinal maraging steel martensite material Metals microstructure NDT temperature notch toughness observed parent plate particles percent nickel steel phase plane strain plane stress plastic deformation precipitate prior austenite psig quenched range relatively rolled room temperature shear lip shown in Fig stress intensity factor structural tempering temperature tensile specimens tensile strength test temperature TiN inclusions tion Trans transition temperature transverse ture weld weldmetal yield strength zinc