Mechanical Behavior of Materials |
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alloys applied stress behavior brittle fracture Burgers vector ceramics Chap Coble creep composite crack advance crack growth crack propagation crack tip craze creep fracture creep rate crystalline cubic curve cyclical decreases diffusion diffusional discussed dislocation density dislocation glide dislocation motion displacement ductile ductile fracture edge dislocation effect embrittlement energy example fatigue fiber FIGURE flow stress fracture mechanism fracture modes fracture toughness glass grain boundaries hardening high-temperature hydrogen illustrated in Fig increases initial interaction linear elastic low temperatures martensite material material's matrix metals microcrack microscopic MN/m² Mode II fracture modulus nucleation obstacles occurs particle plastic deformation plastic flow plastic strain polycrystal polymers region result schematically screw dislocation shear stress shown in Fig single crystals slip plane slip systems solids steel strain rate stress levels stress-strain structure superplastic surface takes place TCRSS tensile axis tensile stress transition values viscoelastic void growth yield strength