## Mechanical metallurgy |

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Page 295

8-6 EFFECT OF

is applied to a specimen can have an important influence on the flow stress.

...

8-6 EFFECT OF

**STRAIN RATE**ON FLOW PROPERTIES The rate at which strainis applied to a specimen can have an important influence on the flow stress.

**Strain rate**is defined as e = de/dt, and is conventionally expressed in units of "per...

Page 297

modern testing machine in which the crosshead velocity can be set accurately

and controlled, it is a simple matter to carry out tension tests at constant

conventional

1 V 7 o;j ...

modern testing machine in which the crosshead velocity can be set accurately

and controlled, it is a simple matter to carry out tension tests at constant

conventional

**strain rate**. The true**strain rate**k is given by de d [in (L/L0)] 1 dL v -e1 V 7 o;j ...

Page 531

It is more usual to evaluate the mean

element to travel through the die t,. However, Chandra and Jonas1 have shown

that the appropriate measure of

large ...

It is more usual to evaluate the mean

**strain rate**in terms of the time for anelement to travel through the die t,. However, Chandra and Jonas1 have shown

that the appropriate measure of

**strain rate**for**strain**-**rate**sensitive materials atlarge ...

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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 | |

15 other sections not shown

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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