Uniaxial fatigue properties of closed die hot forged 42CrMo4 steel: Effect of flash and mechanical surface treatments

Lanzutti, A.; Pujatti, Mattia; Magnan, M.; Andreatta, F.; Nurmi, H.; Silvonen, Aulis; Hlede, E.; Fedrizzi, L.

doi:10.1016/j.matdes.2017.07.017

Cited by 12 publications

(5 citation statements)

References 35 publications

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“…Therefore, it is a much easier process to compare the research results with other examinations during theoretical studies (De Freitas et al, 2016;Henschel and Krüger, 2016), than the necessity of conducting time 326 IJSI 9,3 consuming multiple samples testing. Influence of microstructure, especially inclusions, of this steel on its fatigue properties was examined by many researchers (Bayrak et al, 2007;Das et al, 2015;Henschel and Krüger, 2016;Siemiątkowski et al, 2017;Lanzutti et al, 2017). Main influence on the microstructure of steel has been the heat treatment.…”

Section: Introductionmentioning

confidence: 99%

“…Another factor playing important role is the surface of the element. Multiple researches were conducted (Černý et al, 2012;Lanzutti et al, 2017) in order to examine influence of what surface finish is the most efficient for elements working under fatigue loading. Additionally, some of surface modifications are examined in order to improve elements' fatigue properties (Černý et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Fatigue crack growth of 42CrMo4 and 41Cr4 steels under different heat treatment conditions

Lesiuk

Duda

Correia

et al. 2018

IJSI

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Purpose For nowadays construction purposes, it is necessary to define the life cycle of elements with defects. As steels 42CrMo4 and 41Cr4 are typical materials used for elements working under fatigue loading conditions, it is worth to know how they will behave after different heat treatment. Additionally, typical mechanical properties of material (hardness, tensile strength, etc.) are not defining material’s fatigue resistance. Therefore, it is worth to compare, except mechanical properties, microstructure of the samples after heat treatment as well. The paper aims to discuss these issues. Design/methodology/approach Samples of normalized 42CrMo4 (and 41Cr4) steel were heat treated under three different conditions. All heat treatments were designed in order to change microstructural properties of the material. Fatigue tests were carried out according to ASTM E647-15 standard using compact tension specimens. Later on, based on obtained results, coefficients C and m of Paris’ Law for all specimens were estimated. Similar procedure was performed for 41Cr4 steel after quenching and tempering in different temperatures. Findings The influence of heat treatment on the fatigue crack growth rates (42CrMo4, 41Cr4 steel) has been confirmed. The higher fatigue crack growth rates were observed for lower tempering temperatures. Originality/value This study is associated with influence of microstructural properties of the material on its’ fatigue fracture. The kinetic fatigue fracture diagrams have been constructed. For each type of material (and its heat treatment), the Paris law constants were determined.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fatigue crack growth of 42CrMo4 and 41Cr4 steels under different heat treatment conditions

Lesiuk

Duda

Correia

et al. 2018

IJSI

View full text Add to dashboard Cite

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“…The roughness (Ra, Ry, Rz, and ρr (average curvature of the valley of roughness calculated in agreement with Arola et al [42])) values of the samples were measured using a stylus contact profilometer (Dektak-150) with a stylus tip of 12 µm radius. The K t related to surface topography was calculated by means of the formula suggested by many authors [43], that is:…”

Section: Surface Morphology and Roughnessmentioning

confidence: 99%

“…Concerning the fatigue test results, S-N diagrams were obtained and analysed for each printing direction and instrument used to produce the sample. The fatigue limit was calculated using the Dixon-Mood approach [43]. Afterwards, the failed specimens underwent SEM analysis of the fracture surfaces in order to determine the crack nucleation site.…”

Section: Tensile and Fatigue Testsmentioning

confidence: 99%

Study of the Effect of L-PBF Technique Temporal Evolution on Microstructure, Surface Texture, and Fatigue Performance of Ti gr. 23 Alloy

Lanzutti

Magnan

Vaglio

et al. 2023

Metals

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Titanium alloys are widely used in various technological fields due to their excellent performance. Since the early stages of the 3D printing concept, these alloys have been intensively used as materials for these processes. In this work, the evolution of the performance of the 3D printing process has been studied by analysing the microstructure and the mechanical properties, fatigue and tensile, of the Ti gr. 23 alloy produced by two different models of Concept Laser M2 Cusing machines (an old model and a more recent one). The process parameters recommended by the manufacturer were adopted for each machine. Both microstructural and surface texture characterisations were carried out to better correlate the differences with the production process technique. For the same purpose, tensile tests and microhardness profiles were obtained, while the dynamic mechanical properties were evaluated by means of fatigue tests aimed at determining the fatigue limit of the material using a staircase approach. The mechanical tests were carried out on specimens with three different orientations with respect to the building platform, using two different SLM techniques. The fatigue behaviour was then analysed by evaluating the fracture surfaces and, in particular, the crack nucleation sites. By comparing the calculated fatigue values with the results of local fatigue calculations, an estimate of the residual stresses near the crack nucleation site was obtained. The results showed that the specimens produced on a newer machine had lower roughness (about 10%), slightly higher ductility, and a higher fatigue limit (10–20 MPa) compared to the specimens produced with the same material but on older equipment.

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“…Each of these test methodologies involve simpler loading cases than the Sapphire rig, and hence allow the effect of changing the load levels, frequency, environment, etc, to be investigated. In addition, since the test configuration is simple, access to the lining surface of the sample is relatively easy, which allows monitoring techniques, such as strain gauging or different kinds of imaging (including replica approaches combined with optical microscopy) [13][14][15][16][17][18][19][20] to investigate the test in-situ during testing. A substantial increase in fatigue evolution observations becomes possible (e.g.…”

Section: Introductionmentioning

confidence: 99%

Fatigue assessment of multilayer coatings using lock-in thermography

et al. 2018

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Reviewer #3: "1, The reputable profiles of elements are still present in Fig.4." Response: We have now removed the elemental profiles from the SEM pictures of Fig.4. "4, The reviewer still believe the conclusion of this manuscript should be shorter." Response: We have now made the conclusions 25% shorter and note that at ~450 words this is commensurate with typical length of conclusions for similar length papers previously published in Materials and Design.

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Uniaxial fatigue properties of closed die hot forged 42CrMo4 steel: Effect of flash and mechanical surface treatments

Cited by 12 publications

References 35 publications

Fatigue crack growth of 42CrMo4 and 41Cr4 steels under different heat treatment conditions

Fatigue crack growth of 42CrMo4 and 41Cr4 steels under different heat treatment conditions

Study of the Effect of L-PBF Technique Temporal Evolution on Microstructure, Surface Texture, and Fatigue Performance of Ti gr. 23 Alloy

Fatigue assessment of multilayer coatings using lock-in thermography

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