Mechanical Behavior of Materials |
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Page 281
... creep mechanisms may operate independently or in sequence . Diffusional creep is an example of the former and the resultant creep rate is the sum of the Nabarro - Herring and Coble creep rates ; i.e. , EDIFF = & NH + & c ( 7.18 ) Since ...
... creep mechanisms may operate independently or in sequence . Diffusional creep is an example of the former and the resultant creep rate is the sum of the Nabarro - Herring and Coble creep rates ; i.e. , EDIFF = & NH + & c ( 7.18 ) Since ...
Page 282
... creep rates are equal the net creep rate is approximately equal to the greater of the two rates . That is , and ἑΞ ΕΝΗ ( d > dc ) ἐπές ( d < dc ) ( 7.19a ) ( 7.19b ) Thus , the general conclusion is reached that for independent ( or ...
... creep rates are equal the net creep rate is approximately equal to the greater of the two rates . That is , and ἑΞ ΕΝΗ ( d > dc ) ἐπές ( d < dc ) ( 7.19a ) ( 7.19b ) Thus , the general conclusion is reached that for independent ( or ...
Page 318
... creep is frequently the design limiting factor for many high - temperature structural applications . Upon application of a fixed load or stress , transient creep , characterized by a decreasing creep rate , is first observed . After a ...
... creep is frequently the design limiting factor for many high - temperature structural applications . Upon application of a fixed load or stress , transient creep , characterized by a decreasing creep rate , is first observed . After a ...
Contents
Elastic Behavior | 46 |
Plastic Deformation in Single and Polycrystalline | 137 |
Strengthening of Crystalline Materials | 162 |
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alloys applied stress behavior Burgers vector Chap Coble creep composite crack growth crack tip craze creep fracture creep rate crystalline cubic cyclical decreases diffusion diffusional discussed dislocation density dislocation glide dislocation motion displacement ductile ductile fracture edge dislocation effect embrittlement energy fatigue fiber FIGURE flow stress fracture mechanism fracture toughness glass grain boundaries hardening high-temperature illustrated in Fig increases initial interaction length linear elastic low temperatures martensite material material's matrix mechanism map metals microscopic microstructural MN/m² Mode II fracture modulus Nabarro-Herring noncrystalline nucleation obstacles occurs particle phase plastic deformation plastic flow polycrystal polymers ratio recrystallization region result schematically screw dislocation shear stress shown in Fig single crystals slip plane slip systems solid steel strain rate strengthening stress levels stress-strain curve structure superplastic surface takes place TCRSS tensile strength tensile stress transition values viscoelastic viscosity void growth volume fraction yield strength