Mechanical MetallurgyThis bestselling metallurgy text examines the behaviour of materials under stress and their reaction to a variety of hostile environments. It covers the entire scope of mechanical metallurgy, from an understanding of the continuum description of stress and strain, through crystalline and defect mechanisms of flow and fracture, and on to a consideration of major mechanical property tests and the basic metalworking process. It has been updated throughout, and optimised for metric (SI) units . End-of-chapter study questions are included. |
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Page 376
... CYCLES At the outset it will be advantageous to define briefly the general types of fluctuating stresses which can cause fatigue . Figure 12-2 serves to illustrate typical fatigue stress cycles . Figure 12-2a illustrates a completely ...
... CYCLES At the outset it will be advantageous to define briefly the general types of fluctuating stresses which can cause fatigue . Figure 12-2 serves to illustrate typical fatigue stress cycles . Figure 12-2a illustrates a completely ...
Page 378
... cycles ( N > 105 cycles ) . Under these conditions the stress , on a gross scale , is elastic , but as we shall see shortly the metal deforms plastically in a highly localized way . At higher stresses the fatigue life is progressively ...
... cycles ( N > 105 cycles ) . Under these conditions the stress , on a gross scale , is elastic , but as we shall see shortly the metal deforms plastically in a highly localized way . At higher stresses the fatigue life is progressively ...
Page 425
... cycles and the fatigue damage per cycle is 1 / N = 6.75 × 10-5 . The start - up stress is 20 percent greater than the mean stress in the high - cycle component , or m = 1150 MPa . The alternating stress around this mean is σ = 115 MPa ...
... cycles and the fatigue damage per cycle is 1 / N = 6.75 × 10-5 . The start - up stress is 20 percent greater than the mean stress in the high - cycle component , or m = 1150 MPa . The alternating stress around this mean is σ = 115 MPa ...
Contents
Introduction | 3 |
Stress and Strain Relationships for Elastic Behavior | 17 |
Metallurgical Fundamentals | 101 |
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alloy aluminum angle annealed ASME 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 tensor thickness tool torsion Trans usually velocity workpiece yield strength yield stress York