Journal of Materials Science

, Volume 30, Issue 11, pp 2936–2943 | Cite as

Evaluation of a miniaturized disc test for establishing the mechanical properties of low-alloy ferritic steels

  • V. Vorlicek
  • L. F. Exworthy
  • P. E. J. Flewitt


A miniaturized disc test has been used to measure load-displacement curves for a 2 1/4Cr1Mo steel, from which are derived values for the Young's modulus of elasticity, yield stress and ultimate tensile strength over the temperature range -196 to 25 °C. The miniaturized test uses disc specimens 3 mm diameter and 0.25 mm thick and a test jig that applies a load via a 1 mm diameter steel ball at a constant displacement rate. The reproducibility of the method has been determined by testing a large number of the 2 1/4Cr1Mo steel specimens at each temperature considered. Comparisons have been made between analytical and empirical methods of evaluating the tensile yield stress and ultimate tensile strength from the measured load-displacement data. In addition, consideration has been given to the total energy to fracture, K*, and the variation with temperature which confirms a transition from low-energy cleavage to high-energy ductile fracture.


Tensile Strength Ultimate Tensile Strength Ductile Fracture Steel Ball Empirical Method 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • V. Vorlicek
    • 1
  • L. F. Exworthy
    • 1
  • P. E. J. Flewitt
    • 1
  1. 1.Nuclear Electric, Technology DivisionBerkeley Technology CentreBerkeleyUK

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