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<p>An algorithm for determining macrohardness is suggested and tested experimentally for biocompatible titanium alloys of different classes i.e., Ti – 6Al – 4V, Ti – 14Mo, Ti – 39Nb – 5Zr, on the base of hardness measurements at low loads (1 – 24 N) by the Oliver and Pharr method. The possibility of adjustment of the hardness values for eliminating the impression effect detected during the indentation at low loads and obtaining more accurate results is demonstrated. Derivation of the Nix–Gao equation for quenched titanium alloys has made it possible to determine the hardness values at low loads(3.09 ± 0.03 GPa for Ti – 6Al – 4V, 2.58 ± 0.04 GPa for Ti – 14Mo, 1.73 ± 0.03 GPa for Ti – 39Nb – 5Zr), which correspond to the values of the macrohardness.</p>

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Determination of Macrohardness of Titanium Alloys of Different Classes by Indentation by the Oliver and Pharr Method Under Low Loads

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • A. A. Korenev,
  • F. V. Vodolazsky,
  • A. G. Illarionov

摘要

An algorithm for determining macrohardness is suggested and tested experimentally for biocompatible titanium alloys of different classes i.e., Ti – 6Al – 4V, Ti – 14Mo, Ti – 39Nb – 5Zr, on the base of hardness measurements at low loads (1 – 24 N) by the Oliver and Pharr method. The possibility of adjustment of the hardness values for eliminating the impression effect detected during the indentation at low loads and obtaining more accurate results is demonstrated. Derivation of the Nix–Gao equation for quenched titanium alloys has made it possible to determine the hardness values at low loads(3.09 ± 0.03 GPa for Ti – 6Al – 4V, 2.58 ± 0.04 GPa for Ti – 14Mo, 1.73 ± 0.03 GPa for Ti – 39Nb – 5Zr), which correspond to the values of the macrohardness.