The effect of machining on the surface integrity and fatigue life

Javidi, Ataollah; Rieger, Ulfried; Eichlseder, Wilfried

doi:10.1016/j.ijfatigue.2008.01.005

Cited by 262 publications

(122 citation statements)

References 15 publications

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“…Indeed, the test coupons with higher compression residual stresses are associated with the longest fatigue lifetimes. This phenomenon has been observed in Javidi et al [7] and in Smith et al [23].…”

Section: Surface Integrity/fatigue Lifesupporting

confidence: 58%

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Influence of Milling on the Fatigue Lifetime of a Ti6Al4V Titanium Alloy

Moussaoui

Mousseigne

Senatore

et al. 2015

Metals

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The present article focuses on the influence of machining on the fatigue life of a titanium alloy: Ti6Al4V. An experimental design was adopted in order to highlight the effects of machining parameters on surface integrity while generating very different surfaces with a view to subsequent fatigue testing (four point bending tests). Firstly, the impact of machining parameters on surface integrity was demonstrated. Then, the influence of surface integrity on fatigue lifetime was observed: no influence of the geometric and metallurgical parameters was observed. However, the mechanical parameter (e.g., residual stress) seemed to have a preponderant influence. To conclude, a machining plan of procedure was proposed to significantly improve the fatigue lifetime as compared with a reference industrial plan of procedure.

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Section: Surface Integrity/fatigue Lifesupporting

confidence: 58%

“…To do so, he proposes a low feed rate, a small nose radius and a cutter with a chamfered edge. Javidi et al [7] also show that the feed rate and nose radius are parameters that control residual stresses in turning. For a given feed rate, an improvement in lifetime has been observed with a small nose radius.…”

Section: Introductionmentioning

confidence: 99%

Influence of Milling on the Fatigue Lifetime of a Ti6Al4V Titanium Alloy

Moussaoui

Mousseigne

Senatore

et al. 2015

Metals

View full text Add to dashboard Cite

show abstract

“…In the majority of them, it was found that higher values of hardness are obtained when increasing the depth of cut and feed rate, while on the other hand, cutting speed had the opposite effect on turning of stainless steels [16][17][18] and nickel alloys [19]. However, deviations from these results were reported for carbon alloy steels [9], alloyed steels [20], stainless steels [21] and titanium alloys [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of surface hardness and roughness produced by turning on the torsion mechanical properties of annealed AISI 1020 steel

Zurita-Hurtado

Graci-Tiralongo

Capace-Aguirre

2017

Rev. Fac. Ing. Univ. Antioquia

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This paper presents the results of experimental work carried out to study the influence of surface integrity, measured as hardness (HV) and roughness (Ra) on torsional properties of annealed AISI 1020 steel machined by turning using carbide insert tools. The results showed a reduction in ductility when hardness and roughness increase, caused by the plastic deformation induced after machining. It was shown that the shear yield strength increases, as a consequence of the material strengthening by work-hardening and the rise of stress concentrators. Further, the ultimate shear strength increases with surface hardness, having the opposite effect when the surface roughness caused greater stress concentration. RESUMEN:Este artículo presenta los resultados del trabajo experimental llevado a cabo para estudiar la influencia de la integridad superficial, medida como dureza (HV) y la rugosidad (Ra) en las propiedades a torsión del acero AISI 1020 recocido torneado con herramientas de corte con inserto de carburo. Los resultados mostraron una reducción de la ductilidad con el aumento de la dureza y rugosidad, causado por la deformación plástica inducida después del mecanizado. Se demostró que el límite elástico de cizalladura aumenta como consecuencia del endurecimiento del material y el incremento de concentradores de esfuerzos. Además, la resistencia máxima a la cizalladura aumenta con la dureza de la superficie, pero tiene el efecto contrario cuando la rugosidad de la superficie provoca una mayor concentración de esfuerzos. relevant parameter used for evaluating a machined surface. Many mechanical components require special attention on the surface roughness because it affects the appearance, reliability, and function of the product. Meanwhile, these components also need to have a high surface hardness to resist wear and plastic deformation during services. Therefore, an improved control of surface integrity is considered to be of importance.Several factors affect machined surface roughness, such as tool geometry, tool wear, coolant and cutting parameters. The influence of tool geometry by means of the nose radius has been previously investigated, proving that high radius values cause rough surfaces [2,3]. According to a previous experimental research cutting with a worn tool also resulted in worse roughness [4]. Works conducted to analyze the effect of coolant showed that higher surface roughness was achieved on components machined without coolant, as compared to those with a supply of coolant [5,6]. Finally, there is an abundance of literature describing the relation of cutting parameters on surface roughness. Results from these studies indicated that a higher feed rate and depth of cut increase the surface finish values while cutting speed had the opposite effect on aluminum [6,7], brass alloys [8], carbon alloy steels [9][10][11][12], EN-31 steel [13] and stainless steels [14].

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“…For example, many authors agree that this cutting parameter has negligible influence on the hardness of AISI 316 austenitic stainless steel [5], AISI 4340 steel [6], AISI 1045 steel [7] and 34CrNiMo6 alloy steel [8]. While other studies suggest that higher feed rates have an impact on increasing the surface hardness on turning of AISI 304 -stainless steel [1], titanium based alloy Ti-64 [4] and nickel-based alloy IN-718 [9].…”

Section: Introductionmentioning

confidence: 99%

Surface hardness prediction based on cutting parameters in turning of annealed AISI 1020 steel

Hurtado

Tiralongo

Aguirre

2017

DYNA

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The influence of various cutting parameters, cutting speed (Vc), feed rate (f), and depth of cut (d) on the surface hardness developed by turning annealed AISI 1020 steel using carbide insert tools was investigated. It was shown from the measured results that hardness increases with the increase in all the studied parameters. An analysis of variance (ANOVA) was employed to determine the contributions of each parameter on the response variable. From the results, it was found that cutting speed has the most significant role in producing surface hardness (69.2 %) followed by feed rate (24.4 %), while the depth of cut has the lesser effect (6.4%). Finally, a simple equation is proposed, for the prediction of the values of surface hardness, which accounts for the effects of process parameters.Keywords: AISI 1020; ANOVA; cutting speed; depth of cut; feed rate; surface hardness; turning.Predicción de la dureza superficial en base a los parámetros de corte en el torneado de acero AISI 1020 recocido Resumen La influencia de varios parámetros de corte, velocidad de corte (Vc), velocidad de avance (f), y la profundidad de corte (d) en la dureza superficial desarrollada por torneado en acero AISI 1020 recocido utilizando herramientas de insertos de carburo fue investigada. Se demostró a partir de los resultados medidos que la dureza aumenta con el aumento en todos los parámetros. Se empleó un análisis de varianza (ANOVA) para determinar las contribuciones de cada parámetro estudiado en la variable de respuesta. A partir de los resultados, se encontró que la velocidad de corte tiene el rol más importante en la producción de dureza superficial (69.2 %), seguido de la velocidad de avance (24.4 %), mientras que la profundidad de corte tiene el efecto menor (6.4 %). Finalmente, se propone una ecuación simple, para la predicción de los valores de dureza superficial, que representa los efectos de los parámetros del proceso.Palabras clave: AISI 1020; ANOVA; velocidad de corte; profundidad de corte; velocidad de avance; dureza superficial; torneado.

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The effect of machining on the surface integrity and fatigue life

Cited by 262 publications

References 15 publications

Influence of Milling on the Fatigue Lifetime of a Ti6Al4V Titanium Alloy

Influence of Milling on the Fatigue Lifetime of a Ti6Al4V Titanium Alloy

Effect of surface hardness and roughness produced by turning on the torsion mechanical properties of annealed AISI 1020 steel

Surface hardness prediction based on cutting parameters in turning of annealed AISI 1020 steel

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