Mechanical Metallurgy |
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Page 175
... vacancies away from the dislocation , or less probably , by interstitial atoms diffusing to the dislocation . The ... vacancy U1 = the activation energy for self - diffusion If the dislocations are heavily jogged due to prior plastic ...
... vacancies away from the dislocation , or less probably , by interstitial atoms diffusing to the dislocation . The ... vacancy U1 = the activation energy for self - diffusion If the dislocations are heavily jogged due to prior plastic ...
Page 179
... vacancies ( or interstitials ) behind each jog . Estimates1 of the energy required to form a vacancy or an interstitial atom at a jog in an fcc metal are 4.8 eV for an interstitial atom and 0.7 eV for a vacancy . U1 = α1Gb3 ( 5-26 ) 1 A ...
... vacancies ( or interstitials ) behind each jog . Estimates1 of the energy required to form a vacancy or an interstitial atom at a jog in an fcc metal are 4.8 eV for an interstitial atom and 0.7 eV for a vacancy . U1 = α1Gb3 ( 5-26 ) 1 A ...
Page 180
... vacancies . The activation energy for the movement of the jog or the formation of defects at the jog will be U = α1Gb3 — тb2l - ( 5-29 ) Since a , is much greater for interstitial atoms than for vacancies , vacancy formation will occur ...
... vacancies . The activation energy for the movement of the jog or the formation of defects at the jog will be U = α1Gb3 — тb2l - ( 5-29 ) Since a , is much greater for interstitial atoms than for vacancies , vacancy formation will occur ...
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