## Mechanical metallurgy |

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Page 123

It is often useful to express Eq. (4-11) in terms of shear-strain rate. dy dx y = — =

bp— = bpv (4-12) where v, the average dislocation

can be measured experimentally in many systems. From Eq. (4-12) we see that if

...

It is often useful to express Eq. (4-11) in terms of shear-strain rate. dy dx y = — =

bp— = bpv (4-12) where v, the average dislocation

**velocity**, is a quantity whichcan be measured experimentally in many systems. From Eq. (4-12) we see that if

...

Page 513

A lower-bound analysis requires that a statically admissible stress field be found

throughout the entire material without making an attempt to ensure that the

A lower-bound analysis requires that a statically admissible stress field be found

throughout the entire material without making an attempt to ensure that the

**velocity**conditions are satisfied at every point in the material. The term statically ...Page 531

Table 15-1 Typical values of

operations Operation

to 2 x 1(T2 Mechanical press Charpy impact test Forging hammer Explosive ...

Table 15-1 Typical values of

**velocity**encountered in different testing and formingoperations Operation

**Velocity**, ft/s Tension test Hydraulic extrusion press 2 x 10 6to 2 x 1(T2 Mechanical press Charpy impact test Forging hammer Explosive ...

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### Contents

Stress and Strain Relationships for Elastic Behavior | 18 |

from Elastic Strains 213 Strain Energy 214 Anisotropy | 46 |

Metallurgical Fundamentals | 101 |

Copyright | |

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### Common terms and phrases

alloy angle annealed ASTM atoms axes 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 metallurgy Metals Park modulus necking notch occurs particles percent plane strain 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