Low cycle fatigue life of Ti–6Al–4V alloy under non-proportional loading

Wu, Min; Itoh, Takamoto; Shimizu, Yuuta; Nakamura, Hiroshi; Takanashi, Masahiro

doi:10.1016/j.ijfatigue.2012.06.006

Cited by 39 publications

(13 citation statements)

References 21 publications

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“…Curves for CI are more similar than curves for PP. No additional hardening has been detected in non-proportional cyclic curves analogous to with the wrought titanium [19].…”

Section: Stress-strain Cyclic Curvesmentioning

confidence: 86%

Low cycle fatigue behavior of additively manufactured Ti-6Al-4V under non-proportional and proportional loading

Bressan

Itoh

Berto

2019

Frattura Ed Integrità Strutturale

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Experimental tests were conducted on additive manufactured Ti-6Al-4V titanium alloy to investigate the mechanical and crack properties under multiaxial cyclic loading. Selective Laser Sintering technique (SLS) was employed to fabricate four types of cylindrical hollow specimens. The typology of each specimen is defined by the orientation of the layers and by the application of a stress-relieving heat treatment after the production process. Stress-strain cyclic curves of the materials were obtained to investigate the material cyclic plastic behavior, that resulted independent of specimen variety. Strain-controlled multiaxial low cycle fatigue tests under proportional and non-proportional loading paths were carried out on the specimens. Not heat-treated specimens exhibited a higher low cycle fatigue resistance both for proportional and non-proportional loading. Drastic initial softening was detected in the majority of the tests. Additional hardening was detected in part of non-proportional tests, which is atypical for this alloy. The mutual influence of applied load and microstructural characteristics on fatigue life are finally discussed.

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“…Curves for CI are more similar than curves for PP. No additional hardening has been detected in non-proportional cyclic curves analogous to with the wrought titanium [19].…”

Section: Stress-strain Cyclic Curvesmentioning

confidence: 86%

Low cycle fatigue behavior of additively manufactured Ti-6Al-4V under non-proportional and proportional loading

Bressan

Itoh

Berto

2019

Frattura Ed Integrità Strutturale

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“…Other than the SLM acicular α martensite microstructure investigation by Fatemi et al [77], Ti-6Al-4V multiaxial fatigue investigations have considered mainly the wrought bimodal Ti-6Al-4V microstructure [83,[86][87][88]]. An understanding of the microstructural influence on the critical plane orientation is particularly important in the development of a fatigue resistant microstructure, since the underlying microstructure can have a significant influence over the fatigue fracture plane characteristic of the material [89].…”

Section: Micro-mechanism Contributionmentioning

confidence: 99%

A Review of the As-Built SLM Ti-6Al-4V Mechanical Properties towards Achieving Fatigue Resistant Designs

Agius

Kourousis

Wallbrink

2018

Metals

172

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Ti-6Al-4V has been widely used in both the biomedical and aerospace industry, due to its high strength, corrosion resistance, high fracture toughness and light weight. Additive manufacturing (AM) is an attractive method of Ti-6Al-4V parts' fabrication, as it provides a low waste alternative for complex geometries. With continued progress being made in SLM technology, the influence of build layers, grain boundaries and defects can be combined to improve further the design process and allow the fabrication of components with improved static and fatigue strength in critical loading directions. To initiate this possibility, the mechanical properties, including monotonic, low and high cycle fatigue and fracture mechanical behaviour, of machined as-built SLM Ti-6Al-4V, have been critically reviewed in order to inform the research community. The corresponding crystallographic phases, defects and layer orientations have been analysed to determine the influence of these features on the mechanical behaviour. This review paper intends to enhance our understanding of how these features can be manipulated and utilised to improve the fatigue resistance of components fabricated from Ti-6Al-4V using the SLM technology.

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“…Particularly in aviation and aerospace industries, the fatigue failure of components is unpredictable, and can result in an overwhelming disaster [6]. Therefore, the low-cycle fatigue (LCF) property of near β titanium alloy has received increasing attention over the years [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

Zhang

Zhengyuan

et al. 2020

Mater. Res. Express

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Low-cycle fatigue (LCF) behavior of a novel near β titanium alloy Ti-6Mo-5V-3Al-2Fe (wt%) with various types of secondary α phase was investigated. Results indicate that No.1 microstructure containing crossed and fine intragranular α, as well as discontinuous GB α, is obtained through low temperature (480°C) aging treatment. No.2 microstructure containing parallel and coarse intragranular α, as well as parallel WGB α, forms after high temperature (600°C) aging treatment. Under all strain amplitudes, stress amplitudes and LCF life of the samples with No.1 microstructure are higher than those of the samples with No.2 microstructure. For the samples with No.1 microstructure, more and deeper secondary cracks and dimples form in fatigue crack propagation and fast fracture regions, respectively. Such fatigue fracture behavior reflects a longer LCF life. OPEN ACCESS RECEIVED

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Low cycle fatigue life of Ti–6Al–4V alloy under non-proportional loading

Cited by 39 publications

References 21 publications

Low cycle fatigue behavior of additively manufactured Ti-6Al-4V under non-proportional and proportional loading

Low cycle fatigue behavior of additively manufactured Ti-6Al-4V under non-proportional and proportional loading

A Review of the As-Built SLM Ti-6Al-4V Mechanical Properties towards Achieving Fatigue Resistant Designs

Low-cycle fatigue behavior of Ti-6Mo-5V-3Al-2Fe alloy with various types of secondary α phase

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