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 associated with a given obstacle array is - T max Gb L ( 5.2 ) With decreasing obstacle strength , & increases . An overestimate of the operative stress for strong obstacles is obtained by utilizing Eq . ( 5.1 ) with L ' L ...
... obstacles associated with a given obstacle array is - T max Gb L ( 5.2 ) With decreasing obstacle strength , & increases . An overestimate of the operative stress for strong obstacles is obtained by utilizing Eq . ( 5.1 ) with L ' L ...
Page 178
... obstacle is obtained if both the obstacle spacing and the angle o are known . Unfortunately , it is difficult to determine & accurately for most obstacles . Instead , obstacles are classified generally as either strong ( 4 , ≈ 0 ° ) or ...
... obstacle is obtained if both the obstacle spacing and the angle o are known . Unfortunately , it is difficult to determine & accurately for most obstacles . Instead , obstacles are classified generally as either strong ( 4 , ≈ 0 ° ) or ...
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 |
Copyright | |
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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