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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
Papers

Abstract

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.

Keywords

Tensile Strength Ultimate Tensile Strength Ductile Fracture Steel Ball Empirical Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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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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