Mechanical Behavior of Materials |
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Page 176
... obstacles is difficult . Since the additional strength is determined by the resistance to dislocation motion pro- vided by the obstacles , we begin our discussions on strengthening by considering this factor . 5.2 GENERAL DESCRIPTION OF ...
... obstacles is difficult . Since the additional strength is determined by the resistance to dislocation motion pro- vided by the obstacles , we begin our discussions on strengthening by considering this factor . 5.2 GENERAL DESCRIPTION OF ...
Page 177
... obstacles . = 0 and L ' = L. Thus , the maximum strength associated with a given obstacle array is T = max Gb L ( 5.2 ) C With decreasing obstacle strength , & increases . An overestimate of the operative stress for strong obstacles is ...
... obstacles . = 0 and L ' = L. Thus , the maximum strength associated with a given obstacle array is T = max Gb L ( 5.2 ) C With decreasing obstacle strength , & increases . An overestimate of the operative stress for strong obstacles is ...
Page 178
... obstacle is obtained if both the obstacle spacing and the angle 4 , are known . Unfortunately , it is difficult to determine o accurately for most obstacles . Instead , obstacles are classified generally as either strong ( 0 ° ) or weak ...
... obstacle is obtained if both the obstacle spacing and the angle 4 , are known . Unfortunately , it is difficult to determine o accurately for most obstacles . Instead , obstacles are classified generally as either strong ( 0 ° ) or weak ...
Contents
Overview of Mechanical Behavior | 1 |
Toughening Mechanisms and the Physics of Fracture | 10 |
Elastic Behavior | 44 |
Copyright | |
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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