Fast fatigue characterization by infrared thermography for additive manufacturing

Douellou, Corentin; Balandraud, Xavier; Duc, Emmanuel; Verquin, Benoît; Lefèbvre, Fabien; Sar, Frédéric

doi:10.1016/j.prostr.2019.12.011

Cited by 10 publications

(3 citation statements)

References 21 publications

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“…In the case of maraging steel, it was shown in Ref. [43] that the primary calorific regime is also well described by a quadratic tendency and the secondary by an exponential tendency.…”

Section: Proposed Modelmentioning

confidence: 99%

Rapid characterization of the fatigue limit of additive-manufactured maraging steels using infrared measurements

Douellou

Balandraud

Duc

et al. 2020

Additive Manufacturing

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This paper deals with the fatigue performance of maraging steels manufactured by Powder Bed Fusion using a laser beam (L-PBF). The objective of the study was to develop a method for the rapid and reliable characterization of the produced material's fatigue limit using infrared (IR) thermography.Preliminary conventional fatigue tests were performed, revealing two distinct populations among the printed specimens depending on their locations on the building plate. Next, fatigue tests instrumented by IR camera were processed using heat source reconstruction to measure the mechanical dissipation due to fatigue damage. A statistical model was then proposed to identify the fatigue limit of the material. Finally, a practical application was performed to compare different manufacturing strategies using the same powder, opening perspectives for the rapid optimization of the printing process with respect to the fatigue performance of the parts produced.

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“…In the case of maraging steel, it was shown in Ref. [43] that the primary calorific regime is also well described by a quadratic tendency and the secondary by an exponential tendency.…”

Section: Proposed Modelmentioning

confidence: 99%

Rapid characterization of the fatigue limit of additive-manufactured maraging steels using infrared measurements

Douellou

Balandraud

Duc

et al. 2020

Additive Manufacturing

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“…With the rapid development of sensitive components, an infrared thermal imager is used to detect the temperature change in the fatigue process [7]. Therefore, the method of predicting fatigue life based on temperature has been studied.…”

Section: Introductionmentioning

confidence: 99%

Fatigue life prediction of AZ31B magnesium alloy based on fracture fatigue entropy

Wang

Zhang

Chen³

et al. 2023

Materials Science and Technology

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In this paper, changes in entropy generation, entropy flow and damage are discussed under cyclic loading for AZ31 magnesium alloy. Results show that the entropy generation increases sharply at the beginning of the cycle, decreases to a certain extent and remains stable. The evolution law of entropy flow is similar to that of temperature in the magnesium alloy fatigue process. Fatigue damage rises exponentially and increases rapidly after the damage reaches 0.3. The relationship between the fatigue fracture entropy model and cycle times, which can predict the fatigue life well, is established. The relationship between the stable value of entropy generation and cyclic loading is also established. The fatigue limit is 102.25 MPa, and the error is 6.8%.

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“…In previous works, we have proposed a model of mechanical dissipation as a function of stress amplitude, as well as different criteria for identifying the fatigue limit of additively manufactured steels [21][22][23]. More precisely, we used a "heat source reconstruction" technique to determine the mechanical dissipation (in W.m -3 ) at the origin of the temperature change measured by IR camera.…”

Section: Introductionmentioning

confidence: 99%

Heat Source Reconstruction Applied to Fatigue Characterization Under Varying Stress Amplitude

Douellou

Gravier

Balandraud

et al. 2022

Thermomechanics &Amp; Infrared Imaging, Inverse Problem Methodologies, Mechanics of Additive &Amp; Advanced Manufactured Materi

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Fatigue damage is associated with heat release leading to material self-heating. The present study deals with the measurement of mechanical dissipation from temperature measurements by infrared (IR) thermography during a fatigue test with varying stress amplitude. The experiment was performed in two steps on an additively manufactured steel specimen. First, specific acquisition conditions of the thermal response were used to remove the cyclic fluctuation due to thermoelastic coupling. Second, heat source reconstruction was applied to evaluate the calorific origin of the self-heating during the test. A simplified version of the heat diffusion equation was used assuming a uniform distribution of mechanical dissipation within the specimen. The relationship between stress amplitude and mechanical dissipation was identified without the need for a steady thermal regime at constant load amplitude.

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Fast fatigue characterization by infrared thermography for additive manufacturing

Cited by 10 publications

References 21 publications

Rapid characterization of the fatigue limit of additive-manufactured maraging steels using infrared measurements

Rapid characterization of the fatigue limit of additive-manufactured maraging steels using infrared measurements

Fatigue life prediction of AZ31B magnesium alloy based on fracture fatigue entropy

Heat Source Reconstruction Applied to Fatigue Characterization Under Varying Stress Amplitude

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