Four-point bending fatigue behavior of an equimolar BCC HfNbTaTiZr high-entropy alloy: Macroscopic and microscopic viewpoints

Guennec, Benjamin; Kentheswaran, V.; Perrière, Loïc; Ueno, Akira; Guillot, Ivan; Couzinié, Jean-Philippe; Dirras, G.

doi:10.1016/j.mtla.2018.09.040

Cited by 31 publications

(14 citation statements)

References 52 publications

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“…As an example, bcc steels and eutectoid steels are known to display high fatigue strength ( 38 ) in addition to their high yield or tensile strength. The fatigue properties we report for a list of bcc alloys and metals ( 39 , 40 ) (Fig. 5A) overlap with literature results (Fig.…”

Section: Slip Localization For Fatigue Strength Predictionsupporting

confidence: 89%

“…( A ) The fatigue strength of various metals is reported as a percentage of the yield strength. Fatigue tests were performed at room temperature in the VHCF regime [steels ( 41 – 44 ); Ti alloys ( 45 – 47 ); superalloys ( 48 – 51 ); high-entropy alloy (fcc) CrMnFeCoNi ( 52 ); Cu, Ni, Ta, and Nb alloys ( 49 , 53 – 55 )] and in the high cycle fatigue regime [Mo, W, Ta, Nb, Fe, and Co alloys ( 39 ); HfNbTaTiZr alloy ( 40 , 56 ); steels ( 57 ); aluminum ( 16 , 58 ); magnesium ( 59 , 60 )]. ( B ) Average and 5% highest maximum slip intensity for various metals at 0.2% applied macroscopic plastic strain as a function of the yield strength of the metal.…”

Section: Slip Localization For Fatigue Strength Predictionmentioning

confidence: 99%

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On the origins of fatigue strength in crystalline metallic materials

Stinville

Charpagne

Cervellon

et al. 2022

Science

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Metallic materials experience irreversible deformation with increasing applied stress, manifested in localized slip events that result in fatigue failure upon repeated cycling. We discerned the physical origins of fatigue strength in a large set of face-centered cubic, hexagonal close-packed, and body-centered cubic metallic materials by considering cyclic deformation processes at nanometer resolution over large volumes of individual materials at the earliest stages of cycling. We identified quantitative relations between the yield strength and the ultimate tensile strength, fatigue strength, and physical characteristics of early slip localization events. The fatigue strength of metallic alloys that deform by slip could be predicted by the amplitude of slip localization during the first cycle of loading. Our observations provide a physical basis for well-known empirical fatigue laws and enable a rapid method of predicting fatigue strength as reflected by measurement of slip localization amplitude.

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Section: Slip Localization For Fatigue Strength Predictionsupporting

confidence: 89%

Section: Slip Localization For Fatigue Strength Predictionmentioning

confidence: 99%

On the origins of fatigue strength in crystalline metallic materials

Stinville

Charpagne

Cervellon

et al. 2022

Science

View full text Add to dashboard Cite

show abstract

“…However, usually materials undergo much more complex loading with changes in intensity and directions of the applied stresses. However, information on fatigue properties of HEAs is very limited [32][33][34][35][36][37][38]. Analysis of the available publications shows that (i) only a couple of works addressed fatigue behavior of single fcc phase alloys [37,39]; the rest deal with more complex multiphase alloys; (ii) the fatigue process is mostly analyzed from the mechanistic viewpoint, while microstructure evolution and deformation mechanisms are basically not addressed [34], in particular in the case of fcc HEAs [39].…”

Section: Introductionmentioning

confidence: 99%

Fatigue behaviour of a laser beam welded CoCrFeNiMn-type high entropy alloy

Kashaev

Ventzke

Petrov

et al. 2019

Materials Science and Engineering: A

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“…HfNbTaTiZr exhibits good performance in fatigue tests. The maximum stress required to exceed the yield stress causes fatigue failure of HfNbTaTiZr even in the high cycle fatigue regime ( Guennec et al, 2018a ). In the microstructure, the fatigue strength of the material is affected by the mobility of dislocations, which increases with mobility.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Medical high-entropy alloy: Outstanding mechanical properties and superb biological compatibility

Liu

Yang²,

Liu³

et al. 2022

Front. Bioeng. Biotechnol.

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Medical metal implants are required to have excellent mechanical properties and high biocompatibility to handle the complex human environment, which is a challenge that has always existed for traditional medical metal materials. Compared to traditional medical alloys, high entropy alloys (HEAs) have a higher design freedom to allow them to carry more medical abilities to suit the human service environment, such as low elastic modulus, high biocompatible elements, potential shape memory capability. In recent years, many studies have pointed out that bio-HEAs, as an emerging medical alloy, has reached or even surpassed traditional medical alloys in various medical properties. In this review, we summarized the recent reports on novel bio-HEAs for medical implants and divide them into two groups according the properties, namely mechanical properties and biocompatibility. These new bio-HEAs are considered hallmarks of a historic shift representative of a new medical revolution.

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Four-point bending fatigue behavior of an equimolar BCC HfNbTaTiZr high-entropy alloy: Macroscopic and microscopic viewpoints

Cited by 31 publications

References 52 publications

On the origins of fatigue strength in crystalline metallic materials

On the origins of fatigue strength in crystalline metallic materials

Fatigue behaviour of a laser beam welded CoCrFeNiMn-type high entropy alloy

Medical high-entropy alloy: Outstanding mechanical properties and superb biological compatibility

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