Mechanical Behavior of Materials |
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Page 181
... Grain boundaries are particularly effective obstacles to dislocation motion , as crystallographic factors do not permit the passage of a dislocation from one grain to an adjacent one through a grain boundary . Instead the effect of grain ...
... Grain boundaries are particularly effective obstacles to dislocation motion , as crystallographic factors do not permit the passage of a dislocation from one grain to an adjacent one through a grain boundary . Instead the effect of grain ...
Page 184
... boundaries between them is taken as 1 nm ( about 4 atomic diameters ) , then about 30 % of the atoms of the solid are situ- ated at grain boundaries ; this is a much higher fraction than in conventional poly- crystals ( Prob . 5.10 ) ...
... boundaries between them is taken as 1 nm ( about 4 atomic diameters ) , then about 30 % of the atoms of the solid are situ- ated at grain boundaries ; this is a much higher fraction than in conventional poly- crystals ( Prob . 5.10 ) ...
Page 302
... grain boundaries in a poly- crystal or along the surface of a single crystal . For polycrystals , the diffusion area is thus proportional to 8'd , where d ' is an effective grain - boundary thickness for mass transport . Analysis ...
... grain boundaries in a poly- crystal or along the surface of a single crystal . For polycrystals , the diffusion area is thus proportional to 8'd , where d ' is an effective grain - boundary thickness for mass transport . Analysis ...
Contents
Overview of Mechanical Behavior | 1 |
Toughening Mechanisms and the Physics of Fracture | 10 |
A The Tension Test B StrainRate Sensitivity C Yielding Under | 28 |
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alloys applied stress behavior bonding brittle Burgers vector ceramics Chap CHAPTER Coble creep composite crack growth crack propagation crack tip creep fracture creep rate Crystalline Materials cubic curve cyclical decreases diffusional discussed dislocation density dislocation line dislocation motion displacement ductile ductile fracture edge dislocation embrittlement energy equation example fatigue fiber Figure flow stress Fracture Mechanics fracture toughness glass grain boundaries hardening high-temperature increases initial length linear elastic loading low-temperature martensite material's matrix mechanism map microscopic MN/m² Mode modulus nucleation obstacles particle phase plastic deformation plastic flow plastic strain polycrystalline polycrystals polymers precipitation Prob ratio region result Schematic screw dislocation SECTION shear stress shown in Fig single crystal slip direction slip plane slip systems solids solute atom steel strain rate strengthening stress levels stress-strain structure superplastic surface takes place temperature tensile strength tensile stress tion toughening transition viscoelastic volume fraction yield strength