## Mechanical metallurgy |

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Page 378

°r omax — amin oa - Y = 2 (12-2) The mean stress is the algebraic mean of the

maximum and minimum stress in the

used in presenting fatigue data: Stress ratio R = (12-4) omax °„ 1 - R Amplitude ...

°r omax — amin oa - Y = 2 (12-2) The mean stress is the algebraic mean of the

maximum and minimum stress in the

**cycle**. omax + omin (12-3) 2 Two ratios areused in presenting fatigue data: Stress ratio R = (12-4) omax °„ 1 - R Amplitude ...

Page 414

If a specimen is tested below the fatigue limit, so that it remains unbroken after a

long number of

said to have been undepressed. Understressing frequently results in either an ...

If a specimen is tested below the fatigue limit, so that it remains unbroken after a

long number of

**cycles**, and if then it is tested at a higher stress, the specimen issaid to have been undepressed. Understressing frequently results in either an ...

Page 726

Under a repeated stress

steel can withstand 90,000 psi without failure in 107

internal pressure that can be withstood by the cylinder without fatigue failure ...

Under a repeated stress

**cycle**of zero to a maximum stress in tension the samesteel can withstand 90,000 psi without failure in 107

**cycles**. What is the maximuminternal pressure that can be withstood by the cylinder without fatigue failure ...

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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 metallurgical 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