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Title:Comparison plane strain fracture toughness and isothermal flow properties of structural steel
Author(s):Koves, William John
Subject(s):Fracture Toughness
Isothermal Flow Properties
Abstract:Presented in this paper are the results of a series of isothermal tensile flow tests carried out over a wide range of temperatures and stain rates. The material used for the tensile specimens was an X-52 steel, pipeline material with a room temperature static yield strength of 49,200 psi. The test temperatures ranged from room temperatures to -200°F, and the strain rates used varied between 10-4 and 10 in/in/sec. Both isothermal and adiabatic flow tests were carried out, at selected values of temperature and strain rate, for comparison purposes. The greatest difference between an isothermal and an adiabatic strain hardening exponent occurred at the highest strain rates and the lowest temperatures, where differences as large as 56% were observed. The isothermal strain hardening exponent was found to be a single valued function of the rate parameter T ln [A/ϵ ̇]. This characterization revealed a strain rate and temperature sensitivity transition from a sensitive to an insensitive region for increasing values of T ln [A/ϵ ̇]. An evaluation of Krafft’s fracture criteria suggested a plateau, temperature and strain rate insensitive, KIC value for this material.
Issue Date:1967-08
Publisher:Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report:TAM R 302
Genre:Technical Report
Sponsor:American Iron and Steel Institute, Committee on Properties of Iron and Steel, AISI 44 22 60
Rights Information:Copyright 1967 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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