Notch fatigue behavior of a titanium alloy in the VHCF regime based on a vibration fatigue test

Gao, Zhiyuan; Chen, Xin; Zhu, Shiping; He, Yuehui; Xu, Wei

doi:10.1016/j.ijfatigue.2023.107608

Cited by 18 publications

(3 citation statements)

References 33 publications

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“…Moreover, the damage mechanism is influenced by both time‐dependent processes at elevated temperatures, including oxidation and creep 15,48,49 . (2) Unlike smooth specimens that conventionally exhibit a single fatigue source characteristic at lower stress amplitude, notched specimens often display both single and multiple fatigue source characteristics 50 . This phenomenon is attributed to the stress distribution near the notch.…”

Section: Resultsmentioning

confidence: 99%

“…15,48,49 (2) Unlike smooth specimens that conventionally exhibit a single fatigue source characteristic at lower stress amplitude, notched specimens often display both single and multiple fatigue source characteristics. 50 This phenomenon is attributed to the stress distribution near the notch. References also indicate that a higher K t results in a greater reduction in fatigue strength.…”

Section: Methodsmentioning

confidence: 99%

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A new method for predicting the fatigue strength at various stress ratios based on damage of metallic materials

Gao,

Pang,

et al. 2024

Fatigue Fract Eng Mat Struct

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The prediction of fatigue strength for metallic materials in a wide range of stress ratios is a crucial engineering challenge. To pursue a more accurate method, the dependence of fatigue strength on stress ratio for 35CrMo steel and other materials was investigated in detail. It was found that as the stress ratio increases, the damage mechanism changes, and the errors of the conventional models in predicting the fatigue strength increase. The reason is that those models fail to describe the fatigue damage evolution of metallic materials under some special conditions. Based on the variational fatigue damage, a new prediction method was proposed by introducing the damage parameter. Through the validation with fatigue strength covering a variety of metallic materials and loading conditions, the method exhibits higher universality. And then the corresponding parameter of the formula is further analyzed to elucidate the influences of various loading conditions on fatigue damage of materials.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A new method for predicting the fatigue strength at various stress ratios based on damage of metallic materials

Gao,

Pang,

et al. 2024

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…According to the above literature analysis, at present, no results are available on notch effect on the VHCF response of AM specimens. In general, results on notch effect on the VHCF response are quite limited, [18][19][20][21][22] due to the complexity of designing specimens with notches for ultrasonic fatigue tests. In the paper, a straightforward procedure is defined, by comparing the specimen geometries generally subjected to ultrasonic fatigue tests and by analyzing a stress concentration factor, the dynamic stress concentration factor, specifically defined for specimens subjected to ultrasonic fatigue tests.…”

mentioning

confidence: 99%

Blunt notch effect on the fatigue response up to 10⁹ cycles of selective laser melting Ti6Al4V specimens

Tridello

Niutta

Berto

et al. 2023

Fatigue Fract Eng Mat Struct

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In this paper, the influence of a blunt notch on the VHCF response of SLM Ti6Al4V specimens is investigated. Ultrasonic fully reversed tension–compression tests up to 109 cycles were carried out on unnotched specimens and specimens with a blunt notch. Unnotched specimens show a slightly larger fatigue response, with limited differences. All fatigue failures originated from defects, which are bigger in unnotched specimens, mainly due to the different risk volume of the tested specimens and the related size effect. Interactions between notch, stress gradient, and defect size distribution must be considered to properly assess the influence of notch on the VHCF response.

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Wet shot peening effects on surface integrity and very high cycle fatigue of TC17 titanium alloy

Zhang,

Zhao,

Ren

et al. 2024

Engineering Failure Analysis

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Notch fatigue behavior of a titanium alloy in the VHCF regime based on a vibration fatigue test

Cited by 18 publications

References 33 publications

A new method for predicting the fatigue strength at various stress ratios based on damage of metallic materials

A new method for predicting the fatigue strength at various stress ratios based on damage of metallic materials

Blunt notch effect on the fatigue response up to 10⁹ cycles of selective laser melting Ti6Al4V specimens

Wet shot peening effects on surface integrity and very high cycle fatigue of TC17 titanium alloy

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Notch fatigue behavior of a titanium alloy in the VHCF regime based on a vibration fatigue test

Cited by 18 publications

References 33 publications

A new method for predicting the fatigue strength at various stress ratios based on damage of metallic materials

A new method for predicting the fatigue strength at various stress ratios based on damage of metallic materials

Blunt notch effect on the fatigue response up to 109 cycles of selective laser melting Ti6Al4V specimens

Wet shot peening effects on surface integrity and very high cycle fatigue of TC17 titanium alloy

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Product

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Blunt notch effect on the fatigue response up to 10⁹ cycles of selective laser melting Ti6Al4V specimens