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CHAPTER PAGE I The Characteristics of the Creep Curve
Metallographic Features of Creep
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accelerating creep rate activation energy activation stress alloys aluminium amorphous Andrade Andrade's applied stress atomic distance bicrystal cal/gram-atom Chalmers chromium Constantan cracks creep curve creep deformation creep rate creep recovery creep resistance creep strain creep test critical shear stress crystal grains crystalline slip decrease dislocations effect elongation equation expression fracture gives glide direction glide plane glide process grain boundary Hanson and Wheeler hardening high temperatures increasing creep rate intercrystalline Kauzmann's lattice load low stresses material mechanism metal metallographic molybdenum niobium carbide number of atoms observed occur Orowan Orowan(6 plastic deformation polycrystalline precipitation rate of creep rate of deformation recrystallization regions resistance to creep secondary creep shear stress shown in Fig similar single crystals slip bands specimen steel strain-hardening stress concentration structure term tertiary creep theory thermal softening tion transient creep type of curve unit of flow viscous creep viscous flow work-hardening yield stress zero