$Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying$
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Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying

In the present work, low cycle fatigue (LCF) behavior and fracture characteristic of Ti–6Al–4V-0.55Fe alloy with bimodal microstructure, consisted of equiaxed primary α (αp), lamellar α (αl) and β matrix, are systematically investigated at room temperature. Results indicate that Ti–6Al–4V-0.55Fe all...

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Autores principales:	Yangyang Sun, I.V. Alexandrov, Yuecheng Dong, R.Z. Valiev, Hui Chang, Lian Zhou
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Titanium alloy Fe microalloying Low cycle fatigue Fractography Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/d71073d3d42d4ce2941f00ee0f4130dd
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spelling	oai:doaj.org-article:d71073d3d42d4ce2941f00ee0f4130dd2021-11-16T04:10:43ZOptimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying2238-785410.1016/j.jmrt.2021.11.010https://doaj.org/article/d71073d3d42d4ce2941f00ee0f4130dd2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012898https://doaj.org/toc/2238-7854In the present work, low cycle fatigue (LCF) behavior and fracture characteristic of Ti–6Al–4V-0.55Fe alloy with bimodal microstructure, consisted of equiaxed primary α (αp), lamellar α (αl) and β matrix, are systematically investigated at room temperature. Results indicate that Ti–6Al–4V-0.55Fe alloy mainly exhibits a continuous softening behavior both at high and low strain amplitudes, due to the interaction of back stress(σb) and friction stress(σf) mainly related to the plastic deformation heterogeneity and precipitates shearing, respectively. Compared with Ti–6Al–4V alloy, LCF life of Ti–6Al–4V-0.55Fe is similar at high strain amplitudes (Δεt/2 > 1.0%), while much higher at low strain amplitudes (Δεt/2 < 1.0%), which could be attributed to the extra resistance to dislocation movement and crack propagation produced by Fe microalloying. The fractography shows remarkably different characteristics for these imposed strain amplitudes. At low strain amplitude, there is only one crack initiation site caused by dislocations pile-ups and stress concentration on the specimen surface, accompanied with narrower fatigue striation, while more cracks initiated on the surface with wider fatigue striation due to strain accumulation at high strain amplitudes.Yangyang SunI.V. AlexandrovYuecheng DongR.Z. ValievHui ChangLian ZhouElsevierarticleTitanium alloyFe microalloyingLow cycle fatigueFractographyMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5277-5287 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Titanium alloy Fe microalloying Low cycle fatigue Fractography Mining engineering. Metallurgy TN1-997
spellingShingle	Titanium alloy Fe microalloying Low cycle fatigue Fractography Mining engineering. Metallurgy TN1-997 Yangyang Sun I.V. Alexandrov Yuecheng Dong R.Z. Valiev Hui Chang Lian Zhou Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying
description	In the present work, low cycle fatigue (LCF) behavior and fracture characteristic of Ti–6Al–4V-0.55Fe alloy with bimodal microstructure, consisted of equiaxed primary α (αp), lamellar α (αl) and β matrix, are systematically investigated at room temperature. Results indicate that Ti–6Al–4V-0.55Fe alloy mainly exhibits a continuous softening behavior both at high and low strain amplitudes, due to the interaction of back stress(σb) and friction stress(σf) mainly related to the plastic deformation heterogeneity and precipitates shearing, respectively. Compared with Ti–6Al–4V alloy, LCF life of Ti–6Al–4V-0.55Fe is similar at high strain amplitudes (Δεt/2 > 1.0%), while much higher at low strain amplitudes (Δεt/2 < 1.0%), which could be attributed to the extra resistance to dislocation movement and crack propagation produced by Fe microalloying. The fractography shows remarkably different characteristics for these imposed strain amplitudes. At low strain amplitude, there is only one crack initiation site caused by dislocations pile-ups and stress concentration on the specimen surface, accompanied with narrower fatigue striation, while more cracks initiated on the surface with wider fatigue striation due to strain accumulation at high strain amplitudes.
format	article
author	Yangyang Sun I.V. Alexandrov Yuecheng Dong R.Z. Valiev Hui Chang Lian Zhou
author_facet	Yangyang Sun I.V. Alexandrov Yuecheng Dong R.Z. Valiev Hui Chang Lian Zhou
author_sort	Yangyang Sun
title	Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying
title_short	Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying
title_full	Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying
title_fullStr	Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying
title_full_unstemmed	Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying
title_sort	optimized low-cycle fatigue behavior and fracture characteristics of ti–6al–4v alloy by fe microalloying
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d71073d3d42d4ce2941f00ee0f4130dd
work_keys_str_mv	AT yangyangsun optimizedlowcyclefatiguebehaviorandfracturecharacteristicsofti6al4valloybyfemicroalloying AT ivalexandrov optimizedlowcyclefatiguebehaviorandfracturecharacteristicsofti6al4valloybyfemicroalloying AT yuechengdong optimizedlowcyclefatiguebehaviorandfracturecharacteristicsofti6al4valloybyfemicroalloying AT rzvaliev optimizedlowcyclefatiguebehaviorandfracturecharacteristicsofti6al4valloybyfemicroalloying AT huichang optimizedlowcyclefatiguebehaviorandfracturecharacteristicsofti6al4valloybyfemicroalloying AT lianzhou optimizedlowcyclefatiguebehaviorandfracturecharacteristicsofti6al4valloybyfemicroalloying
_version_	1718426755258122240

Optimized low-cycle fatigue behavior and fracture characteristics of Ti–6Al–4V alloy by Fe microalloying

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