ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 13 November 2008
Page Count: 6

Measurement of Very Low Creep Strains: A Review

Kloc, Luboš
Institute of Physics of Materials AS CR, Brno,

Mareček, Petr
Faculty of Chemistry, Brno University of Technology, Brno,

(Received 9 October 2007; accepted 10 October 2008)

Abstract

Various experimental techniques using mechanical springs for high strain sensitivity creep testing are described. A theory of stress and strain using these techniques is briefly summarized. Problems and advantages of the helicoid spring specimen technique are also analyzed. The helicoid spring specimen technique provides high efficiency for low-stress creep experiments in the self-loaded mode, while the external load mode allows extraordinary strain sensitivity. A new machine for conducting high-sensitivity torsion creep tests is presented together with some examples of creep curves obtained by the technique. The machine was designed to enable high sensitivity creep tests of inherently brittle materials such as intermetallics and ceramics.

Keywords:
creep testing techniques, heat resistant steel, intermetallics, structural ceramics

Paper ID: JTE101475
DOI: 10.1520/JTE101475
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