Development of test facilities for thermo-mechanical fatigue testing

Palmer, Jennie; Jones, Jonathan; Dyer, A.; Smith, Robin; Lancaster, Robert; Whittaker, Mark

doi:10.1016/j.ijfatigue.2018.12.015

Cited by 23 publications

(14 citation statements)

References 17 publications

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“…The issue of crack growth experimentation under induction heating has long been questioned, due to the risk of preferential crack tip heating. However, more recently the work by Palmer et al [10] has shown no significant effect of this in the nickel superalloy RR1000, and also in the titanium alloy Ti6246. Whilst alternative approaches such as lamp furnaces offer an alternative heating source, induction coils require less capital expenditure and provide the opportunity for easier access to the test specimen, allowing for additional investigation through extensometry, thermography and digital image correlation.…”

Section: Introductionmentioning

confidence: 94%

The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

Jones

Whittaker

Lancaster

et al. 2020

International Journal of Fatigue

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Section: Introductionmentioning

confidence: 94%

The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

Jones

Whittaker

Lancaster

et al. 2020

International Journal of Fatigue

Self Cite

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“…The first setup included an Instron 100 kN servo-hydraulic test frame with a Zwick CUBAS control system and a Trueheat 10 kW induction coil heating with forced air cooling using four Meech pneumatic air amplifiers. However, before starting the testing, different coil designs as well as effect of crack tip heating were investigated since eddy currents generated by induction coil heating might interact with the direct current potential drop (DCPD) currents creating noise and interference [8]. Therefore, various coil designs and cooling methods were investigated to provide the most appropriate balance between axial and radial thermal gradients, desired heating and cooling rates as well as best line of sight towards the fatigue crack starter notch, enabling investigations of preferential crack tip heating.…”

Section: Equipment and Heating Methodsmentioning

confidence: 99%

“…Swansea University developed a three-stage load shedding pre-cracking procedure conducted at room temperature in the project to avoid multiple crack initiation sites, [8]. The first stage was conducted at 120% of the test load with a frequency of 5 Hz, which was reduced to 100% of the test load in the 2 nd stage.…”

Section: Pre-cracking Proceduresmentioning

confidence: 99%

DevTMF – Towards code of practice for thermo-mechanical fatigue crack growth

Stekovic

Jones

Engel

et al. 2020

International Journal of Fatigue

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…An intermediate frequency heating generator supplied with handmade coil is used for temperature heating. Previous articles have demonstrated that induction heating can be used in crack growth tests without causing additional damage 29 . Spot welded K‐type thermocouples are used to measure and control temperature cycles.…”

Section: Materials and Facilitymentioning

confidence: 99%

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Zheng

Zhao

et al. 2022

Fatigue Fract Eng Mat Struct

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Investigating fatigue crack growth behavior of materials is crucial to the life design and safety evaluation of engineering structures. During the practical service condition, the temperature keeps changing, which cannot be studied by the traditional fatigue crack growth test method at constant temperature. In this study, we focus on constructing a new thermomechanical fatigue (TMF) crack propagation testing method, developing a thermal deformation compensation method, and proposing an equivalent compliance method suitable for variable temperature conditions based on ASTM E647 standard to measure the crack length. Furthermore, the load-and strain-controlled TMF tests under different phase angles are carried out to prove the validity of the new method.

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Development of test facilities for thermo-mechanical fatigue testing

Cited by 23 publications

References 17 publications

The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

DevTMF – Towards code of practice for thermo-mechanical fatigue crack growth

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

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