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University of Illinois Urbana-Champaign

Approximate calculation of frequency factor in deformation rate equation

Feltner, C.E.

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https://hdl.handle.net/2142/112326

Description

Title
Approximate calculation of frequency factor in deformation rate equation
Author(s)
Feltner, C.E.
Issue Date
1961-10
Keyword(s)
  • Deformation-rate Equation
  • Metal Deformation
  • Theory Of Rate Processes
Date of Ingest
2021-11-04T16:27:36Z
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.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 607
  • 1971-8602
ISSN
0073-5264
Type of Resource
text
Genre of Resource
technical report
Language
eng
Permalink
http://hdl.handle.net/2142/112326
Sponsor(s)/Grant Number(s)
Air Force Aero Sys Division Wright Patterson AFB Ohio 61/10
Copyright and License Information
Copyright 1961 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
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.