The applicability of two familiar analytic descriptions of micromechanical deformation as equations of state for polycrystalline iron is discussed. These equations are the power law and the relationship based on reaction rate theory. It is shown that the reaction rate description fails to describe adequately individual stress relaxation events without invoking undue complexity from use of adjustable parameters. Moreover, even in that case, this formulation lacks the predictive capability required in an equation of state. Conversely, the power law is found not only to describe stress relaxation data properly but also to provide the capability of predicting stress relaxation following initial deformation by different loading paths. It thus appears to represent an equation of state for the material.
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January 1977
Research Papers
A Mechanical Equation of State for Inelastic Deformation of Iron: An Analytic Description
R. W. Rohde,
R. W. Rohde
Sandia Laboratories, Albuquerque, N. M.
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J. C. Swearengen
J. C. Swearengen
Sandia Laboratories, Albuquerque, N. M.
Search for other works by this author on:
R. W. Rohde
Sandia Laboratories, Albuquerque, N. M.
J. C. Swearengen
Sandia Laboratories, Albuquerque, N. M.
J. Eng. Mater. Technol. Jan 1977, 99(1): 59-64 (6 pages)
Published Online: January 1, 1977
Article history
Received:
March 26, 1976
Revised:
June 23, 1976
Online:
August 17, 2010
Citation
Rohde, R. W., and Swearengen, J. C. (January 1, 1977). "A Mechanical Equation of State for Inelastic Deformation of Iron: An Analytic Description." ASME. J. Eng. Mater. Technol. January 1977; 99(1): 59–64. https://doi.org/10.1115/1.3443407
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