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Micromechanical Modelling of Creep Using Distributed Parameters by Rishi Raj; A.K. Ghosh is a Engineering article available to read on EtoBox.

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## Abstrnct-Microstructural parameters such as diffusion coefficients and grain size usually have distributed vaiues in a polycrynal. However. micromechanical constitutive equations for power-law creep and diffusional creep assume that these parameters are uniform. In this paper it is shown that the use of distributed parameters can lead to a transition from power-law creep to diffusional creep which is spread over several orders of magnitude in strain rate. It also leads to the generation of internal stress and anelasticity. Two specific cases, a bimodal distribution of grain size and a fwo phase structure. are anaiysed in detail. A graphical analytical technique which is developed can be extended to other distribution functions; but even the simple bimodal structures are relevant to engineering materials such as austcnitic stainless steels and m-8 titanium alloys. This paper primarily concerns steady state creep and includes a brief discussion on the transient problem. Further developments will be given in a subsequent paper.

Who reads Micromechanical Modelling of Creep Using Distributed Parameters?

Author

Rishi Raj; A.K. Ghosh

Publisher

Elsevier Science; Elsevier ; University of Toronto Press; Elsevier BV (ISSN 0001-6160)

Published

1981

Language

EN

Field

Engineering (Physical Sciences)