Elastic modulus of nanocrystalline titanium evaluated by cyclic tensile method

Krzysztof Topolski , Tomasz Brynk , Halina Garbacz

Abstract

The present study is devoted to examinations of the elastic modulus with the use of the uniaxial tensile test. The commertial purity titanium Grade 2 in the two states i.e. microcrystalline (mc-Ti) and nanocrystalline (nc-Ti) were examined. Bulk nc-Ti was fabricated by hydrostatic extrusion (HE) which is one of the severe plastic deformation methods (SPD). The elastic modulus of mc-Ti and nc-Ti were compared with the aim to analyze the influence of the nanostructure of titanium on its elastic modulus. The mc-Ti and nc-Ti samples were subjected to uniaxial tensile tests at various strain rates and various values of stress. Generally, higher elastic modulus values were obtained in microcrystalline titanium. The elastic modulus of mc-Ti was evaluated at 107 GPa on average, whereas the elastic modulus of nc-Ti was 94 GPa on average. The nanocrystalline titanium had a lower elastic modulus than its microcrystalline counterpart by 13% on average, which can be attributed to the presence of significant volume of amorphous regions in the structure. Moreover, in this case a lower standard deviation of all the results was obtained. In most cases, with higher applied stress (load) the value of the modulus was lower, whereas at higher strain rates its value was higher.
Author Krzysztof Topolski ZPM
Krzysztof Topolski,,
- Division of Materials Design
, Tomasz Brynk ZPM
Tomasz Brynk,,
- Division of Materials Design
, Halina Garbacz ZPM
Halina Garbacz,,
- Division of Materials Design
Journal seriesArchives of Civil and Mechanical Engineering, ISSN 1644-9665
Issue year2016
Vol16
Pages927-934
Publication size in sheets0.5
Keywords in PolishModuł sprężystości, Moduł Young’a, Nanomateriały, Nanokrystaliczny tytan, Właściwości mechaniczne
Keywords in EnglishElastic modulus, Young's modulus, Nanomaterials, Nanocrystalline titanium, Mechanical properties
DOIDOI:10.1016/j.acme.2016.07.001
URL http://www.sciencedirect.com/science/article/pii/S1644966516300851
Languageen angielski
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KT_Elastic modulus of nanocrystalline titanium.pdf (file archived - login or check accessibility on faculty) KT_Elastic modulus of nanocrystalline titanium.pdf 1 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.216 (2) - 2016=1.922 (5)
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