Mechanical MetallurgyI Mechanical Fundamentals 1 Introduction 2 Stress and Strain Relationships for Elastic Behavior 3 Elements of the Theory of Plasticity II Metallurgical Fundamentals 4 Plastic Deformation of Single Crystals 5 Dislocation Theory 6 Strengthening Mechanisms 7 Fracture III Applications to Materials Testing 8 The Tension Test 9 The Hardness Test 10 The Torsion Test 11 Fracture Mechanics 12 Fatigue of Metals 13 Creep and Stress Rupture 14 Brittle Fracture and Impact Testing IV Plastic Forming of Metals 15 Fundamentals of Metalworking 16 Forging 17 Rolling of Metals 18 Extrusion 19 Drawing of Rods, Wires and Tubes 20 Sheet-Metal Forming 21 Maching of Metals Appendixes |
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Page 247
... crack spreads . Griffith established the following criterion for the propagation of a crack : A crack will propagate when the decrease in elastic strain energy is at least equal to the energy required to create the new crack surface ...
... crack spreads . Griffith established the following criterion for the propagation of a crack : A crack will propagate when the decrease in elastic strain energy is at least equal to the energy required to create the new crack surface ...
Page 368
... crack propagation as the plastic zone grows as the crack extends from a sharp notch . It provides a record of the toughness of a material as the crack extends under increasing crack - extension forces . An R curve is a graphical ...
... crack propagation as the plastic zone grows as the crack extends from a sharp notch . It provides a record of the toughness of a material as the crack extends under increasing crack - extension forces . An R curve is a graphical ...
Page 396
... crack propagates initially along the persistent slip bands . In a polycrystalline metal the crack may extend for only a few grain diameters before the crack propagation changes to stage II . The rate of crack propagation in stage I is ...
... crack propagates initially along the persistent slip bands . In a polycrystalline metal the crack may extend for only a few grain diameters before the crack propagation changes to stage II . The rate of crack propagation in stage I is ...
Contents
Introduction | 3 |
Stress and Strain Relationships for Elastic Behavior | 18 |
Metallurgical Fundamentals | 101 |
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alloy aluminum angle annealed ASTM atoms axis behavior billet brittle fracture Burgers vector cold-worked components compression constant crack creep cycles decrease determined diameter direction dislocation line ductile edge dislocation elastic elongation embrittlement energy engineering equation extrusion factor failure fatigue limit fibers Figure flow curve flow stress force forging friction given grain boundaries hot-working hydrostatic increase indentation lattice length load machining martensite material matrix maximum measured mechanical metallurgical Metals Park modulus necking notch occurs particles percent plane-strain plastic deformation plastic strain pressure produce properties ratio recrystallization reduction region residual stresses rolling screw dislocation shear stress sheet shown in Fig slip plane slip systems Society for Metals specimen steel strain hardening strain rate stress-strain curve structure surface temperature tensile strength tensile stress tension test tensor thickness tool torsion Trans usually velocity workpiece yield strength yield stress