Effect of Slide Burnishing on the Surface Layer and Fatigue Life of Titanium Alloy Parts

Zaleski, Kazimierz; Skoczylas, Agnieszka

doi:10.2478/adms-2019-0020

Cited by 17 publications

(12 citation statements)

References 24 publications

(30 reference statements)

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“…For evaluation of measured hardness value improvements by burnishing, improvement ratios were introduced, which are shown in Eq. ( 2) [15]:…”

Section: Resultsmentioning

confidence: 99%

“…Burnishing studies of wrought titanium alloys showed that beyond machining parameters also lubricants may have significant effect to surface hardness, wear resistance and fatigue [15,16], roller burnishing experiments of Ti4Al4V show that significant improvement of surface roughness and hardness can be achieved even in cryogenic conditions [17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surface Hardness Modification of Selective Laser Melted Ti6Al4V Parts by Sliding Friction Diamond Burnishing

Dezső

Szigeti

Varga

2023

Period. Polytech. Mech. Eng.

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Selective laser melting (SLM) is a frequently used additive manufacturing technology for creating metallic, especially Ti6Al4V parts. After the production by SLM usually postprocessing is necessary for several reasons. Here the sliding friction diamond burnishing is applied as postprocessing procedure.In this paper an experimental study of surface hardness improvement of selective laser melted Ti6Al4V ELI cylindrical parts is demonstrated. The surface is modified by sliding friction diamond burnishing as postprocessing machining. The design of experiment method was applied to investigate effect of five factors (two SLM and three machining parameters) on surface hardness modification.It is shown that both SLM and postprocessing factors makes significant effect to the surface hardness improvement, most important ones are laser power, laser scan speed during manufacturing, and the burnishing force as factor of postprocessing. Empirical formulas are fit to measurement data, and visualized by surface plots. Relationship between factors and the surface hardness improvement is strongly nonlinear. In the investigated parameter window burnishing force has always positive effect to surface hardness improvement.Electron microscopic investigations show that change in surface hardness can be related to four main morphological changes: compression of the surface by plastic deformation of protrusions, attenuation of valleys, formation of inner cavities and creation of small protrusions by diamond tool. This paper is an extended paper of a conference paper published in the proceedings book of the XXXI. International Welding Conference (Kecskemét, Hungary).

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“…For evaluation of measured hardness value improvements by burnishing, improvement ratios were introduced, which are shown in Eq. ( 2) [15]:…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Hardness Modification of Selective Laser Melted Ti6Al4V Parts by Sliding Friction Diamond Burnishing

Dezső

Szigeti

Varga

2023

Period. Polytech. Mech. Eng.

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“…Nagniatanie ślizgowe powoduje powstanie głębokiej warstwy utwardzonej w której wywołany zostaje stan naprężeń ściskających [3]. Ze względu na mały promień narzędzia nagniatanie ślizgowe charakteryzuje się występowaniem niewielkich sił, co umożliwia obróbkę części o małej sztywności [4]. Proces nagniatania pozwala na osiągnięcie takich korzyści jak [5]: wzrost twardości powierzchni, wzrost odporności zmęczeniowej, możliwość obróbki powierzchni o dużym promieniu naroża, możliwość obróbki powierzchni o małej wartości współczynnika tarcia, zdolność do wytworzenia wysokiej gładkości powierzchni, minimalne nagrzewanie się warstwy wierzchniej podczas obróbki, możliwość stosowania narzędzi dogniatających zamocowanych na tokarkach uniwersalnych, wysoką wydajność procesu, niskie zużycie energii procesu nagniatania.…”

Section: Wprowadzenieunclassified

Modelowanie Wpływu Parametrów Obróbki Nagniataniem Na Chropowatość Powierzchni Wałków Ze Stali 42crmo4

Antosz¹,

Kluz²,

Trzepieciński³

et al. 2021

ZN PRz Mechanika

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W artykule przedstawiono wyniki badań mających na celu określenie wpływu parametrów nagniatania ślizgowego na chropowatość powierzchni wałków wykonanych ze stali 42CrMo4. Proces nagniatania wykonano przy użyciu narzędzi z końcówką z polikrystalicznego diamentu. Przed nagniataniem próbki poddano toczeniu na tokarce narzędziowej. Badania prowadzono według planu Hartleya PS/DS-P:Ha3, który umożliwia zdefiniowanie równania regresji w postaci wielomianu drugiego stopnia. Wykorzystano również modele sztucznej sieci neuronowej do przewidywania chropowatości powierzchni wałków po procesie nagniatania. Rozważane parametry wejściowe procesu obejmowały wartości nacisku, prędkości nagniatania i prędkości posuwu. We wszystkich analizowanych przypadkach nagniatania wartość chropowatości powierzchni określonej parametrem Ra uległa zmniejszeniu. Różnice między danymi eksperymentalnymi a modelem Hartleya nie przekraczały 24%. Najlepszą reprezentację modelu Hartleya uzyskano dla parametrów nagniatania: posuw f = 0,32 mm/obr, nacisk P = 130 N i prędkość nagniatania v = 180 obr/min. Perceptrony wielowarstwowe były najlepszymi predyktorami chropowatości powierzchni wałków. Przy współczynniku korelacji Pearsona R2 powyżej 0,998 wartość średniego błędu bezwzględnego nie przekroczyła 0,005.

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“…They have shown a significant impact on the fretting fatigue crack propagation lifetime. Zaleski and Skoczylas [18] investigated experimentally the effects of slide burnishing on the surface roughness, surface layer microhardness, and fatigue life of Ti6Al2Mo2Cr titanium alloy parts, who found that the changes in the surface layer properties induced by slide burnishing lead to an increased lifetime of the components. Based on the above, it can be noted that the fretting is a challenging physical phenomenon, which involves different sciences, i.e.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Geometrical Parameters Effect on Contact Zone Under Fretting Fatigue Loading

Chaouch

Baltach

Benhamena

2022

Advances in Materials Science

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The fatigue process under fretting conditions is characterized by small oscillatory movements due to vibrating or cyclic loads between two surfaces in contact. Two phenomena can arise as a consequence: the surface wear of the bodies in contact, giving rise to the so-called fretting wear. The second phenomenon concerns crack nucleation in the contact region, causing a reduction in the fatigue strength of the component subjected to cyclic loading. This process is called “fretting fatigue”. In the present study, finite element models (2D-FEM) are provided to demonstrate the effect of pad radius on the contact parameters such as: contact pressure, shear traction, stresses, sliding, size of contact line and crack nucleation and its location along the contact line of aeronautical Al2024 alloy under fretting fatigue loading. Six numerical models are utilized to describe the effect of changing pad radii on contact stresses and damage of crack nucleation. The Ruiz parameter criterion should be used to predict the location of crack initiation in the contact zone. Comparison of the finite element results shows that there is a good agreement between the numerical modeling predictions with those analytical results. The stress field, relative slip, and damage parameters in fretting fatigue loading were highlighted. The pad radius substantially affects the distribution of contact parameters. Particular attention must be taken into consideration to this variable when analyzing the structure in fretting fatigue.

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Effect of Slide Burnishing on the Surface Layer and Fatigue Life of Titanium Alloy Parts

Cited by 17 publications

References 24 publications

Surface Hardness Modification of Selective Laser Melted Ti6Al4V Parts by Sliding Friction Diamond Burnishing

Surface Hardness Modification of Selective Laser Melted Ti6Al4V Parts by Sliding Friction Diamond Burnishing

Modelowanie Wpływu Parametrów Obróbki Nagniataniem Na Chropowatość Powierzchni Wałków Ze Stali 42crmo4

Numerical Analysis of Geometrical Parameters Effect on Contact Zone Under Fretting Fatigue Loading

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