Mechanical Metallurgy |
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Page 642
... extrusion with good lubrication . Decreasing the die angle increases the homogeneity of deformation and lowers the extrusion pressure , but beyond a point the friction in the die surfaces becomes too great . For most extrusion ...
... extrusion with good lubrication . Decreasing the die angle increases the homogeneity of deformation and lowers the extrusion pressure , but beyond a point the friction in the die surfaces becomes too great . For most extrusion ...
Page 644
... extruded hot so as to take advantage of the decrease in flow stress or deformation resistance with increasing temperature . Since hot - working introduces the problems of oxidation of the billet and the extrusion tools and softening of ...
... extruded hot so as to take advantage of the decrease in flow stress or deformation resistance with increasing temperature . Since hot - working introduces the problems of oxidation of the billet and the extrusion tools and softening of ...
Page 653
... EXTRUSION The concept of hydrostatic extrusion was introduced in Figure 15-25 . Because the billet is subjected to uniform hydrostatic pressure , it does not upset to fill the bore of the container as it would in conventional extrusion ...
... EXTRUSION The concept of hydrostatic extrusion was introduced in Figure 15-25 . Because the billet is subjected to uniform hydrostatic pressure , it does not upset to fill the bore of the container as it would in conventional extrusion ...
Contents
Introduction 325 | 3 |
Elements of the Theory of Plasticity | 72 |
Plastic Deformation of Single Crystals | 105 |
Copyright | |
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alloys angle annealed atoms axis behavior billet brittle fracture Burgers vector cold-worked components compression constant crack criterion cycles decrease determined diameter direction dislocation line ductile edge dislocation elastic elongation energy equations extrusion factor failure fatigue limit fibers flow curve flow stress force forging friction given grain boundaries hot-working hydrostatic increases lattice length load machining martensite material matrix maximum measured mechanical metallurgical Metals Park modulus normal stress notch occurs orientation particles percent plastic deformation plastic strain polymer pressure produced properties ratio reduction region residual stresses rolling screw dislocation shear strain shear stress sheet shown in Fig shows slip plane slip systems Society for Metals solid specimen steel strain hardening strain rate stress-strain curve structure surface tensile strength tensile stress tensor theory thermal thickness tool torsion Trans usually velocity workpiece yield strength yield stress York