{"title":"Determination of Macrohardness of Titanium Alloys of Different Classes by Indentation by the Oliver and Pharr Method Under Low Loads","authors":"A. A. Korenev, F. V. Vodolazsky, A. G. Illarionov","doi":"10.1007/s11041-025-01127-4","DOIUrl":null,"url":null,"abstract":"<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>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"67 1-2","pages":"48 - 55"},"PeriodicalIF":0.5000,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metal Science and Heat Treatment","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11041-025-01127-4","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
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.
期刊介绍：
Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering.
Topics covered include:
New structural, high temperature, tool and precision steels;
Cold-resistant, corrosion-resistant and radiation-resistant steels;
Steels with rapid decline of induced properties;
Alloys with shape memory effect;
Bulk-amorphyzable metal alloys;
Microcrystalline alloys;
Nano materials and foam materials for medical use.
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