Characteristic Features of Ultrafine-Grained Ti-45 wt.% Nb Alloy under High Cycle Fatigue; Materials; Vol. 14, iss. 18

Characteristic Features of Ultrafine-Grained Ti-45 wt.% Nb Alloy under High Cycle Fatigue; Materials; Vol. 14, iss. 18

Podrobná bibliografie
Parent link:	Materials Vol. 14, iss. 18.— 2021.— [5365, 21 p.]
Korporativní autor:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Další autoři:	Mayrambekova A. M. Aykol Mayrambekovna, Eroshenko A. Yu. Anna Yurjevna, Oborin V. A. Vladimir Aleksandrovich, Bannikov M. V. Mikhail Vladimirovich, Chebodaeva V. V. Valentina Vadimovna, Terekhina A. I. Alena, Naymark O. B. Oleg Borisovich, Dmitriev A. I. Andrey Ivanovich, Sharkeev Yu. P. Yury Petrovich
Shrnutí:	Title screen The paper presents the results of fatigue-testing ultrafine-grained and coarse-grained Ti-45 wt.% Nb alloy samples under very high cycle fatigue (gigacycle regime), with the stress ratio R = ?1. The ultrafine-grained (UFG) structure in the investigated alloy was formed by the two-stage SPD method, which included multidirectional forging (abc–forging) and multipass rolling in grooved rollers, with further recrystallization annealing. The UFG structure of the Ti-45 wt.% Nb alloy samples increased the fatigue limit under the high-cycle fatigue conditions up to 1.5 times compared with that of the coarse-grained (CG) samples. The infrared thermography method was applied to investigate the evolution of temperature fields in the samples under cyclic loading. Based on numerical morphology analysis, the scale invariance (the Hurst exponent) and qualitative differences for UFG and CG structures were determined. The latter resulted from the initiation and propagation of fatigue cracks in both ultra-fine grained and coarse-grained alloy samples under very high-cycle fatigue loading.
Jazyk:	angličtina
Vydáno:	2021
Témata:	электронный ресурс труды учёных ТПУ Ti-45 wt.% Nb alloy ultrafine-grained structure fatigue testing surface morphology Hurst exponent infrared thermography method ультрамелкозернистая структура показатель Херста инфракрасная термография
On-line přístup:	https://doi.org/10.3390/ma14185365
Médium:	Elektronický zdroj Kapitola
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668824

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