Isothermal and thermomechanical fatigue behaviour of Ti–6Al–4V titanium alloy

Prasad, Kartik; Kumar, Vikas

doi:10.1016/j.msea.2011.04.085

Cited by 35 publications

(4 citation statements)

References 31 publications

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“…Heating systems for mechanical testings of metals usually fall into two main categories : induction heating [14,33,34], and infrared heating [9,35,36]. The former category allows to heat complex parts where thermal fields are hard to generate and can be regulated with a pyrometer.…”

Section: Thermal Measuresmentioning

confidence: 99%

Mechanical Fatigue Testing Under Thermal Gradient and Manufacturing Variabilities in Nickel-Based Superalloy Parts with Air-Cooling Holes

et al. 2022

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Background: As aerospace cast parts move to more complex geometries, the impact of process variabilities must be evaluated more precisely to provide new, less empirical acceptation criteria. However, experimental lifetime assessment with Thermal Gradient Mechanical Fatigue (TGMF) are still complicated to reproduce in a laboratory environment. Objective : This paper investigates the impact of geometrical variability on thermo-mechanical fatigue life of Nickel-based superalloy single crystal parts. Methods : To this end, hollow specimens with cooling holes drilled in their centre have been produced with parametrized variations of the wall thickness and have been characterized by Xray tomography. An experimental fatigue setup operating at 1100 • C, with a thermal gradient of 50 • C across the wall, has been developed to assess the life of each specimen. Results : Experimental lifetime assessment were conducted on a sample of specimens containing geometrical defects. Optical observations during the tests have permitted to study crack initiation and propagation in the vicinity of the cooling hole, an area of high thermal and stress gradients where damage localize. Axial strains (in the loading direction) were also gathered and TGMF on Cooling Holes compared to prove the impact of process variabilities on mechanical behaviour. Conclusions : Significant mechanical differences are observed during the tests which can related to the geometrical variations of the specimens and their interaction with the shaped hole. Tests results will be further used to calibrate a creep-fatigue model for lifetime predictions.

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Section: Thermal Measuresmentioning

confidence: 99%

Mechanical Fatigue Testing Under Thermal Gradient and Manufacturing Variabilities in Nickel-Based Superalloy Parts with Air-Cooling Holes

et al. 2022

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“…High‐temperature parts like aeroengine compressor disk bear the combined action of centrifugal loading, torsional loading, aerodynamic loading, and so on during service, that is, multiaxial thermomechanical fatigue (MTMF), which will lead to material fatigue, creep, and oxidation 1–9 . Moreover, the amount of these damages will change with the change of material type or loading path, which seriously affects the failure life of high‐temperature equipment 10–12 . At present, modern aeroengines continue to pursue high thrust weight ratio, and their service reliability and safety need to be guaranteed; therefore, damage calculation and life assessment for MTMF have become a new hot issue.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9] Moreover, the amount of these damages will change with the change of material type or loading path, which seriously affects the failure life of hightemperature equipment. [10][11][12] At present, modern aeroengines continue to pursue high thrust weight ratio, and their service reliability and safety need to be guaranteed; therefore, damage calculation and life assessment for MTMF have become a new hot issue.…”

Section: Introductionmentioning

confidence: 99%

Viscoplastic constitutive model considering strain rate sensitivity under multiaxial thermomechanical fatigue loading

Shang

Chen³

et al. 2023

Fatigue Fract Eng Mat Struct

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“…Titanium alloys are one of the most widely applied structural materials in heat‐conducting tubes of vapor generators and other components of aerospace and nuclear reactors because of their low density, high specific strength and high‐temperature mechanical properties . However, titanium alloys exposed to high‐temperature environment are liable to surface failure, including hot corrosion, oxidation, microcracking, and surface degradation . In addition, titanium alloys with a high infrared emissivity coating can enhance the heat control in industries mentioned above when taking into account thermal radiation heat transfer, especially in high temperature .…”

Section: Introductionmentioning

confidence: 99%

Oxidation Resistance of AlPO₄ Bonded Ceramic Coating Formed on Titanium Alloy for High‐Temperature Applications

Tian

Wang

Zhang

et al. 2014

Int J Applied Ceramic Tech

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AlPO4 based coatings were prepared on Ti‐6Al‐2Zr‐1Mo‐1V titanium alloy using aluminum phosphate as a binder and Al2O3/Cr2O3 based mixing particles as the fillers. The microstructure, phase and chemical composition of the coatings were analyzed by SEM, XRD and EDS techniques. The high temperature infrared emissivity values of coated and uncoated titanium samples were tested. The results show that the coating had a higher infrared emissivity value (>0.8) than titanium substrate (0.15–0.3) in the wide wavelength range of 5–20 mm, which is attributed to the uniform dispersion of high emissivity Al2O3 and Cr2O3 particles in the AlPO4 binder matrix. The coated titanium samples exhibited excellent oxidation resistance performance with significantly decreased oxidation rates at 600 and 800°C. The mass gain of the coated sample kept at a low and stable constant of 0.15 mg/cm2, significantly lower than that of titanium substrate (0.54 mg/cm2) when oxidized at 600°C up to 100 h.

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Isothermal and thermomechanical fatigue behaviour of Ti–6Al–4V titanium alloy

Cited by 35 publications

References 31 publications

Mechanical Fatigue Testing Under Thermal Gradient and Manufacturing Variabilities in Nickel-Based Superalloy Parts with Air-Cooling Holes

Mechanical Fatigue Testing Under Thermal Gradient and Manufacturing Variabilities in Nickel-Based Superalloy Parts with Air-Cooling Holes

Viscoplastic constitutive model considering strain rate sensitivity under multiaxial thermomechanical fatigue loading

Oxidation Resistance of AlPO₄ Bonded Ceramic Coating Formed on Titanium Alloy for High‐Temperature Applications

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Isothermal and thermomechanical fatigue behaviour of Ti–6Al–4V titanium alloy

Cited by 35 publications

References 31 publications

Mechanical Fatigue Testing Under Thermal Gradient and Manufacturing Variabilities in Nickel-Based Superalloy Parts with Air-Cooling Holes

Mechanical Fatigue Testing Under Thermal Gradient and Manufacturing Variabilities in Nickel-Based Superalloy Parts with Air-Cooling Holes

Viscoplastic constitutive model considering strain rate sensitivity under multiaxial thermomechanical fatigue loading

Oxidation Resistance of AlPO4 Bonded Ceramic Coating Formed on Titanium Alloy for High‐Temperature Applications

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Oxidation Resistance of AlPO₄ Bonded Ceramic Coating Formed on Titanium Alloy for High‐Temperature Applications