Localization of Plastic Deformation in Ti-6Al-4V Alloy

This article investigated the mechanical behavior of Ti-6Al-4V alloy (VT6, an analog to Ti Grade 5) in the range of strain rates from 0.1 to 10<sup>3</sup> s<sup>−1</sup>. Tensile tests with various notch geometries were performed using the Instron VHS 40/50-20 servo hydrauli...

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Autores principales:	Vladimir V. Skripnyak, Vladimir A. Skripnyak
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	localization of deformation titanium alloys stress triaxiality high strain rate fracture topology of fracture surface Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/9e1bd06c44b7471e8a5e75469d69491d
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spelling	oai:doaj.org-article:9e1bd06c44b7471e8a5e75469d69491d2021-11-25T18:21:38ZLocalization of Plastic Deformation in Ti-6Al-4V Alloy10.3390/met111117452075-4701https://doaj.org/article/9e1bd06c44b7471e8a5e75469d69491d2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1745https://doaj.org/toc/2075-4701This article investigated the mechanical behavior of Ti-6Al-4V alloy (VT6, an analog to Ti Grade 5) in the range of strain rates from 0.1 to 10<sup>3</sup> s<sup>−1</sup>. Tensile tests with various notch geometries were performed using the Instron VHS 40/50-20 servo hydraulic testing machine. The Digital Image Correlation (DIC) analysis was employed to investigate the local strain fields in the gauge section of the specimen. The Keyence VHX-600D digital microscope was used to characterize full-scale fracture surfaces in terms of fractal dimension. At high strain rates, the analysis of the local strain fields revealed the presence of stationary localized shear bands at the initial stages of strain hardening. The magnitude of plastic strain within the localization bands was significantly higher than those averaged over the gauge section. It was found that the ultimate strain to fracture in the zone of strain localization tended to increase with the strain rate. At the same time, the Ti-6Al-4V alloy demonstrated a tendency to embrittlement at high stress triaxialities.Vladimir V. SkripnyakVladimir A. SkripnyakMDPI AGarticlelocalization of deformationtitanium alloysstress triaxialityhigh strain ratefracturetopology of fracture surfaceMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1745, p 1745 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	localization of deformation titanium alloys stress triaxiality high strain rate fracture topology of fracture surface Mining engineering. Metallurgy TN1-997
spellingShingle	localization of deformation titanium alloys stress triaxiality high strain rate fracture topology of fracture surface Mining engineering. Metallurgy TN1-997 Vladimir V. Skripnyak Vladimir A. Skripnyak Localization of Plastic Deformation in Ti-6Al-4V Alloy
description	This article investigated the mechanical behavior of Ti-6Al-4V alloy (VT6, an analog to Ti Grade 5) in the range of strain rates from 0.1 to 10<sup>3</sup> s<sup>−1</sup>. Tensile tests with various notch geometries were performed using the Instron VHS 40/50-20 servo hydraulic testing machine. The Digital Image Correlation (DIC) analysis was employed to investigate the local strain fields in the gauge section of the specimen. The Keyence VHX-600D digital microscope was used to characterize full-scale fracture surfaces in terms of fractal dimension. At high strain rates, the analysis of the local strain fields revealed the presence of stationary localized shear bands at the initial stages of strain hardening. The magnitude of plastic strain within the localization bands was significantly higher than those averaged over the gauge section. It was found that the ultimate strain to fracture in the zone of strain localization tended to increase with the strain rate. At the same time, the Ti-6Al-4V alloy demonstrated a tendency to embrittlement at high stress triaxialities.
format	article
author	Vladimir V. Skripnyak Vladimir A. Skripnyak
author_facet	Vladimir V. Skripnyak Vladimir A. Skripnyak
author_sort	Vladimir V. Skripnyak
title	Localization of Plastic Deformation in Ti-6Al-4V Alloy
title_short	Localization of Plastic Deformation in Ti-6Al-4V Alloy
title_full	Localization of Plastic Deformation in Ti-6Al-4V Alloy
title_fullStr	Localization of Plastic Deformation in Ti-6Al-4V Alloy
title_full_unstemmed	Localization of Plastic Deformation in Ti-6Al-4V Alloy
title_sort	localization of plastic deformation in ti-6al-4v alloy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9e1bd06c44b7471e8a5e75469d69491d
work_keys_str_mv	AT vladimirvskripnyak localizationofplasticdeformationinti6al4valloy AT vladimiraskripnyak localizationofplasticdeformationinti6al4valloy
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Localization of Plastic Deformation in Ti-6Al-4V Alloy

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