COMPARISON OF TWO TECHNIQUES FOR EVALUATING SPHERICAL INDENTATION DATA

Authors

  • Aleš Materna Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech Republic
  • Petr Haušild Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech Republic
  • Jan Ondráček Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, Czech Republic

DOI:

https://doi.org/10.14311/APP.2020.27.0136

Keywords:

Automatic ball indentation, Oliver-Pharr method, pile-up, true stress-strain curve

Abstract

Flow curves of 15Kh2MFA, Sv 08Kh19N10G2B and 08Kh18N10T steels used for fabrication of WWER-440 nuclear reactor pressure vessel and core internals were obtained using the automated ball indentation (ABI) test technique and compared with flow curves evaluated from the same measured load-displacement data and widely used Oliver-Pharr method. Differences in results obtained by both studied methods do not exceed 12 % and are attributed to the amount of material pile-up.

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Published

2020-06-11

Issue

Vol. 27 (2020): Proceedings of the 14th International Conference on Local Mechanical Properties - LMP 2019

Section

Articles

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