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Title:Approximate calculation of frequency factor in deformation rate equation
Author(s):Feltner, C.E.
Subject(s):Deformation-rate Equation
Metal Deformation
Theory Of Rate Processes
Abstract:The deformation of metals at low temperatures is experimentally described by an equation of the form y˙ = ∨ exp - (H/kT). This equation is derived from the theory of rate processes. Considerable experimental data, especially for BCC metals,indicates that the frequency factor is a constant. This paper is intended to explore reasons why the frequency factor seems to be constant over the range of strain rates and temperatures investigated experimentally. To do this, the frequency factor ∨ is determined by an approximate calculation from the dislocation frequency, the strain during activation and the entropy of activation. Using some experimental data on iron, the frequency factor is calculated and this value is found to agree well with the measured value.
Issue Date:1961-10
Publisher:Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report:TAM R 607
1971-8602
Genre:Technical Report
Type:Text
Language:English
URI:http://hdl.handle.net/2142/112326
ISSN:0073-5264
Sponsor:Air Force Aero Sys Division Wright Patterson AFB Ohio 61/10
Rights Information:Copyright 1961 Board of Trustees of the University of Illinois
Date Available in IDEALS:2021-11-04


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  • Technical Reports - Theoretical and Applied Mechanics (TAM)
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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