Titlebook: Defects, Fracture and Fatigue; Proceedings of the S G. C. Sih,J. W. Provan Conference proceedings 1983 Martinus Nijhoff Publishers, The Hag

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PAD416

Fatigue Softening in Precipitation Hardened Copper-Cobalt Single Crystalsat.% Co alloy. The amount of softening after passing a maximum stress amplitude is nearly equivalent to the amount of precipitation hardening, ∆τ.. This is the result of the total destruction of precipitates in persistent slip bands (PSBs). The latter have formed at the maximum stress amplitude befo

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Entirety

Intergranular Fracture Criteria and Interfacial Thermodynamic Propertiesed. The propagation criteria are developed by investigating the stability of such nucleated crack against blunting by nucleated dislocations. The cohesion potential, emanating from the crack nucleation and propagation criteria, is developed in terms of the thermodynamic description of Gibbs with par

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Statistical Mechanics of Early Growth of Fatigue Cracks reversed cyclic loads. The physical basis, mathematical form, and numerical solution of the theory are described, and experimental tests are proposed. For brevity and clarity, the simplified version presented here describes surface cracks propagating with one tip permanently blocked.

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The Effect of Homo- and Heterogeneous Mechanisms Coupling on Microcrack Nucleation in Metalsal process of nucleation. The first one is a spatial lattice diffusion of vacancies which allows to form a homogeneous vacancy cluster (a microvoid, assumed as spherical) within the grain. The second one consists actually of two different simultaneous mechanisms which are responsible for generation

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A Model of High-Cycle Fatigue-Crack Initiation at Grain Boundaries by Persistent Slip Bandsip bands (PSBs) but also at grain boundaries (GBs) at sites where PSBs impinge. A dislocation model of the latter type of PSB-GB crack initiation is formulated. The model is based on a recent description of the growth of extrusions at emerging PSBs in single crystals. It is assumed that PSB-GB crack

剧本

Shape and Structure of Persistent Slip Bands in Iron Carbon Alloysoped at the specimen surface during fatigue loading. In spite of these early observations only some years ago, major advance has been made in understanding the most important microstructural details of these persistent slip bands (PSB) in fcc single and polycrystals with high stacking fault energies

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