Mechanical Behavior of Materials |
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Page 109
... strain at the radial position , r , is obtained : 109 SECTION 3.6 Properties of Dislocations Y = b 2πr ( 3.10 ) The strain energy per unit volume is Gy2 / 2 ; 4 thus for the volume element located at position r in Fig . 3.23a , the ...
... strain at the radial position , r , is obtained : 109 SECTION 3.6 Properties of Dislocations Y = b 2πr ( 3.10 ) The strain energy per unit volume is Gy2 / 2 ; 4 thus for the volume element located at position r in Fig . 3.23a , the ...
Page 135
... energy results from the atomic structural irregularities associated with line defects . This strain energy can be approximated as Gb2 / 2 per unit length of line , where G is the material shear modulus and b the Burgers vector . This ...
... energy results from the atomic structural irregularities associated with line defects . This strain energy can be approximated as Gb2 / 2 per unit length of line , where G is the material shear modulus and b the Burgers vector . This ...
Page 187
... strain energy ( shaded region ) is relieved somewhat . This leads to an attractive inter- action energy between the solute and the dislocation . If the solute atom were posi- tioned below the glide plane , a repulsive energy would ...
... strain energy ( shaded region ) is relieved somewhat . This leads to an attractive inter- action energy between the solute and the dislocation . If the solute atom were posi- tioned below the glide plane , a repulsive energy would ...
Contents
Overview of Mechanical Behavior | 1 |
Toughening Mechanisms and the Physics of Fracture | 10 |
Elastic Behavior | 44 |
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alloys applied stress behavior brittle Burgers vector ceramics Chap CHAPTER Coble creep composite crack growth crack propagation crack tip craze creep fracture creep rate Crystalline Materials cubic curve cyclical decreases diffusion diffusional discussed dislocation density dislocation line dislocation motion displacement ductile ductile fracture edge dislocation embrittlement energy equation fatigue fiber Figure flow stress Fracture Mechanics fracture toughness glass glide grain boundaries hardening high-temperature increases initial length linear elastic loading low-temperature macroscopic martensite material's matrix mechanism map MN/m² Mode modulus noncrystalline nucleation obstacles particle phase plastic deformation plastic flow plastic strain polycrystals polymers precipitation Prob ratio region result Schematic screw dislocation SECTION shear stress shown in Fig single crystal slip plane slip systems solid solute atom steel strain rate strengthening stress levels stress-strain structure superplastic surface takes place temperature tensile strength tensile stress tion toughening transition viscoelastic viscosity volume fraction yield strength