Fracture Behavior and Fatigue Performance of Inconel 625

Pereira, Fábio Gustavo Lima; Lourenço, Jorge Magner; Nascimento, Rubens Maribondo do; Castro, Nicolau Apoena

doi:10.1590/1980-5373-mr-2017-1089

Cited by 24 publications

(9 citation statements)

References 19 publications

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“…The endurance limit at 2.10 6 cycles is found to be 350 and 400 MPa, respectively, highlighting the importance of surface defects in fatigue life. The limit observed is still inferior to wrought 23,25 Inconel 625 and to the expected standard for Inconel 625, given at 475 MPa for 10 7 cycles 1 . Yet others found a significantly better fatigue resistance for machined LPBF Inconel 625 samples with an endurance at 10 7 cycles of 600 MPa, 26 in spite of systematic crack initiation on lacks of fusion (LoFs).…”

Section: Introductioncontrasting

confidence: 54%

Impact of annealing treatment on the fatigue behavior of Inconel 625 produced by laser‐based powder bed fusion

Martin

Hor

Copin

et al. 2022

Fatigue Fract Eng Mat Struct

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Laser‐based powder bed fusion (LPBF) is attractive to build complex parts in spite of the low machinability of Inconel 625. The LPBF microstructures and tensile properties are well documented in literature. But fatigue properties and impact of the LPBF intrinsic defects and microstructures on the crack initiation and propagation mechanisms are uncommon. Low and high‐cycle fatigue tests at room and service temperature presented in this paper prove that the LPBF defects shorten the crack initiation stage. After annealing heat treatment, the microstructure adapts to the defects, and the fatigue response becomes similar to a free defect material. The fatigue life of as‐built Inconel 625 is lower than 50% of its monotonic yield tensile strength (YTS) while the annealed material reaches 100% of its YTS. The propagation rate is slowed by the homogeneous annealed microstructure and improved ductility resulting from removal of dislocation cells and changes in grain morphology.

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Section: Introductioncontrasting

confidence: 54%

Impact of annealing treatment on the fatigue behavior of Inconel 625 produced by laser‐based powder bed fusion

Martin

Hor

Copin

et al. 2022

Fatigue Fract Eng Mat Struct

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“…The material has a yield strength of 472 MPa and an ultimate strength of 935 MPa. The loading starts from 125%, 100%, 81% and 65% of the yield strength [34]. The constant amplitude ratio of R= -1 and frequency of 10 Hz was applied during fatigue testing of the Inconel 625 specimens.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The constant amplitude ratio of R= -1 and frequency of 10 Hz was applied during fatigue testing of the Inconel 625 specimens. The S-N curve in Figure 10 shows the comparison of results from ANSYS and Pereira et al (2018). The fatigue life decreases as the stress increases.…”

Section: Numerical Resultsmentioning

confidence: 99%

Prediction of fatigue life of aluminum 2024-T3 at low temperature by finite element analysis

Mazlan¹,

Yidris²,

Zahari³

et al. 2020

JMES

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The change in material properties at low temperature has always been one of the concerned design factors in aircraft industries. The wings and fuselage are repeatedly exposed to sub zero temperature during cruising at high altitude. In this study, fatigue tests were conducted on standard flat specimens of aluminum 2024-T3 at room temperature and at -30 °C. The monotonic and cyclic loading tests were conducted using MTS 810 servo hydraulic machine equipped with a cooling chamber. The monotonic tests were conducted at a crosshead speed rate of 1 mm/min and the cyclic tests at a frequency of 10 Hz with a load ratio of 0.1. The experimental data obtained, such as the yield strength, ultimate strength and S-N curve were used as the input parameters in ANSYS Workbench 16.1. This close agreement demonstrates that the isotropic model in ANSYS workbench is essential in predicting fatigue life. The increase in stress parameter causes fatigue life to decrease. Besides, the decrease in temperature causes the total fatigue life to increase.

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“…The presented results showed that increasing the radius of the notch root improved the fatigue strength, with a greater number of load cycles. During the fatigue test, at some point the damage of the material, initially developing faster in the specimen center, began to dominate at the notch root [ 27 , 28 ]. The change in the place of damage dominance depended on the notch root radius; the later it occurred, the greater the notch radius was.…”

Section: Fatigue Testsmentioning

confidence: 99%

Analysis of the Failure Process of Elements Subjected to Monotonic and Cyclic Loading Using the Wierzbicki–Bai Model

Janus-Galkiewicz

Gałkiewicz

2021

Materials

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This article presents the results of a simulation in which smooth cylindrical and ring-notched samples were subjected to monotonic and fatigue loads in an ultra-short-life range, made of Inconel 718 super alloy. The samples displayed different behaviors as a result of different geometries that introduced varying levels of stress triaxiality and loading methods. The simulations used the Wierzbicki–Bai model, which took into account the influence of stress tensors and stress-deviator invariants on the behavior of the material. The difference in the behaviors of the smoothed and notched specimens subjected to tensile and fatigue loads were identified and described. The numerical results were qualitatively supported by the results of the experiments presented in the literature.

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Fracture Behavior and Fatigue Performance of Inconel 625

Cited by 24 publications

References 19 publications

Impact of annealing treatment on the fatigue behavior of Inconel 625 produced by laser‐based powder bed fusion

Impact of annealing treatment on the fatigue behavior of Inconel 625 produced by laser‐based powder bed fusion

Prediction of fatigue life of aluminum 2024-T3 at low temperature by finite element analysis

Analysis of the Failure Process of Elements Subjected to Monotonic and Cyclic Loading Using the Wierzbicki–Bai Model

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