Mechanical Metallurgy |
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Page 357
... flow stress in bcc metals . 9-8 COMBINED EFFECT OF TEMPERATURE AND STRAIN RATE We may combine the expressions describing the temperature and strain - rate dependence of flow stress to give σ = f ( Z ) = ƒ ( ¿ eaH / RT ) ( 9-50 ) where ...
... flow stress in bcc metals . 9-8 COMBINED EFFECT OF TEMPERATURE AND STRAIN RATE We may combine the expressions describing the temperature and strain - rate dependence of flow stress to give σ = f ( Z ) = ƒ ( ¿ eaH / RT ) ( 9-50 ) where ...
Page 394
... FLOW CURVE Tabor1 has suggested a method by which the plastic region of the true - stress - true- strain curve may be determined from indentation hardness measurements . The method is based on the fact that there is a similarity in the ...
... FLOW CURVE Tabor1 has suggested a method by which the plastic region of the true - stress - true- strain curve may be determined from indentation hardness measurements . The method is based on the fact that there is a similarity in the ...
Page 548
... flow stress . to 103 s - 1 are readily achieved . The chief difficulty with this test is the fact that stress and strain vary with radial distance in the specimen . Usually the maximum values at the surface are reported , but this may ...
... flow stress . to 103 s - 1 are readily achieved . The chief difficulty with this test is the fact that stress and strain vary with radial distance in the specimen . Usually the maximum values at the surface are reported , but this may ...
Contents
Introduction 325 | 3 |
Elements of the Theory of Plasticity | 72 |
Plastic Deformation of Single Crystals | 105 |
Copyright | |
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alloys angle annealed atoms axis behavior billet brittle fracture Burgers vector cold-worked components compression constant crack criterion cycles decrease determined diameter direction dislocation line ductile edge dislocation elastic elongation energy equations extrusion factor failure fatigue limit fibers flow curve flow stress force forging friction given grain boundaries hot-working hydrostatic increases lattice length load machining martensite material matrix maximum measured mechanical metallurgical Metals Park modulus normal stress notch occurs orientation particles percent plastic deformation plastic strain polymer pressure produced properties ratio reduction region residual stresses rolling screw dislocation shear strain shear stress sheet shown in Fig shows slip plane slip systems Society for Metals solid specimen steel strain hardening strain rate stress-strain curve structure surface tensile strength tensile stress tensor theory thermal thickness tool torsion Trans usually velocity workpiece yield strength yield stress York