Improving fatigue strength of hydromachinery 13Cr‐4Ni CA6NM steel with nitriding and thermal spraying surface treatments

Hernández‐Rengifo, Erick; Rodríguez, S.A.; Coronado, J.J.

doi:10.1111/ffe.13413

Cited by 9 publications

(5 citation statements)

References 46 publications

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“…The increase in the fatigue limit is about 13%. This value is relatively low if compared with other quenched and tempered steels after the nitriding heat treatment, which can increase their fatigue limit much more compared with untreated conditions [18][19][20]. It is also possible to notice a certain level of data scattering in the presence of fatigue life below 2 × 10 7 cycles, as suggested by Gui et al [21].…”

Section: Hcfmentioning

confidence: 90%

Investigations of Fatigue Damage in a Nitriding Low-Carbon Bainitic Steel for High-Performance Crankshaft

Giorgetti

Millefanti

Battaglia

et al. 2022

Metals

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In the automotive environment, the need to increase the performance of materials requires extra engineering efforts. The possibility of developing new materials is strategically important. Indeed, alternative solutions in terms of material choice allow designers to optimise their projects and keep competitive production costs. Traditional quenched and tempered steels are usually used for highly stressed components, and possible alternatives could be important competitive opportunities. One possible substitute is using bainitic steels to exploit their economic advantages while maintaining acceptable mechanical performances. This paper explores the fatigue life behaviour of a new low-carbon bainitic steel for applications requiring case hardening treatment obtained by the nitriding process. A high-cycle fatigue (HCF) strength assessment is conducted through a test campaign to compare treated and untreated material. The improvement in fatigue strength is evaluated as well as the study of fracture surfaces, residual stress, and microhardness profiles to assess in detail the effectiveness of the nitriding process. It is found that the nitriding leads to an improvement in fatigue life but not as much as expected because of the low ductile behaviour of this steel, the high speed of stress application added, and the embrittlement of the nitriding treatment, as confirmed through fracture surface analysis.

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Section: Hcfmentioning

confidence: 90%

Investigations of Fatigue Damage in a Nitriding Low-Carbon Bainitic Steel for High-Performance Crankshaft

Giorgetti

Millefanti

Battaglia

et al. 2022

Metals

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“…At the same time, the absolute value of microhardness is 2.0 GPa in the base metal. It can be also seen that there is a significant uneven distribution of microhardness in the surface layer (1), in the transition zone with a nickel layer (2), and in the base metal (3). A sharp increase in the microhardness in the surface coating is associated with the formation of nanocrystalline grains (40-200 nm).…”

Section: Coating Technology and Experiental Proceduresmentioning

confidence: 95%

“…This modification of the surface allows improving the mechanical behavior of engineering materials. 2 Moreover, the surface modification leads to the crack retardation as it is demonstrated in the case of aluminum alloy for aircraft skin with bionic coupling units processed by laser cladding. 3 In recent years, a fundamentally new direction in this area has been the coating of surfaces by promising shape memory alloys (SMA).…”

mentioning

confidence: 97%

The effect of surface coating by shape memory alloys on mechanical properties of steel

Махутов

Matvienko

Blednova

et al. 2022

Fatigue Fract Eng Mat Struct

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“…Low-carbon martensitic stainless steels with excellent comprehensive mechanical properties and an adjustable structure are widely used in many fields such as petroleum pipelines and hydraulic turbines [1][2][3][4][5]. With the further development of energy resources in extreme environments such as the seabed and the Arctic, higher requirements are put forward for the performance of low-carbon martensitic stainless steels [6,7].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Reversed Austenite Evolution during Intercritical Tempering of Low-Carbon Martensitic Stainless Steel

Huo,

Peng,

Chen

et al. 2024

Materials

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Since the formation of reversed austenite during critical tempering treatment is an important factor affecting the mechanical properties of 13Cr4Ni martensitic stainless steel, a detailed study of the content and morphology of reversed austenite in heat treatment is needed. In this study, the variation curves of a reversed austenite volume fraction with holding time at different tempering temperatures were measured by in situ X-ray diffraction (XRD), and the reversed austenite and carbides of each process were evaluated by transmission electron microscopy (TEM). The austenite content shows a parabolic change with the increase in the tempering temperature; the maximum can reach a peak of about 6.8% at 610 °C, and drops to 0% at 660 °C. It also shows a parabolic change with the extension of the holding time, reaching a maximum of about 9.2% at 5 h of holding time, and a decreasing trend at 10 h of holding time, about 6.8%. The results show that the precipitation of carbides in the microstructure causes elemental segregation at grain boundaries and inside, which is one of the main factors affecting the thermal stability of reversed austenite formation. The kinetic process of reversed austenite during the tempering process was simulated using the JMAK model and the KM model, which can describe the trend of reversed austenite content during the tempering process. Combining the two models, a mathematical model for the room-temperature reversed austenite content under different processes was obtained, and this can predict the room-temperature austenite content.

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Improving fatigue strength of hydromachinery 13Cr‐4Ni CA6NM steel with nitriding and thermal spraying surface treatments

Cited by 9 publications

References 46 publications

Investigations of Fatigue Damage in a Nitriding Low-Carbon Bainitic Steel for High-Performance Crankshaft

Investigations of Fatigue Damage in a Nitriding Low-Carbon Bainitic Steel for High-Performance Crankshaft

The effect of surface coating by shape memory alloys on mechanical properties of steel

Numerical Simulation of Reversed Austenite Evolution during Intercritical Tempering of Low-Carbon Martensitic Stainless Steel

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