Analysis of corrosion on sintered stainless steel: Mechanical and physical aspects

Barile, Claudia; Casavola, Caterina; Campanelli, Sabina Luisa; Renna, Gilda

doi:10.1016/j.engfailanal.2018.09.032

Cited by 15 publications

(5 citation statements)

References 13 publications

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“…One, there may be the formation of new micro-porosities (pitting) emerging on the surface as well as an increase in existing ones; on the other hand, the formation of corrosion products. In agreement with literature, the pits on the surface, for the longer exposure times, may also be partially filling by means of material products, whose morphological characteristics depend largely on the corrosive atmosphere that generated them [12,13], leading to a slight decrease in the Rt roughness. 4.…”

Section: Corrosion Behavioursupporting

confidence: 90%

“…As can be observed, the surface morphology of the as-received SLM sample (before aging -0 h) was characterized by rough texture resulted mainly from partially melted powder adhering to the surface (balling phenomena). In agreement with literature [6][7][8][9][10][11][12][13][14], the surface of the sample subjected to SST were characterized by local corrosion: usually manifested by random formation of pits. Specifically, randomly shaped and round pits of small-sizes and shallow could be observed on the surfaces during the first 48 h (see the high-resolution SEM images in Figure 4b and 4c).…”

Section: Corrosion Behavioursupporting

confidence: 88%

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Corrosion Resistance Behaviour of recycled AlSi10Mg alloy: Surface Morphology and Acoustic Emission Investigation

Barile

Casavola

Vimalathithan

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The corrosion resistance behaviour of recycled AlSi10Mg alloy prepared using Selective Laser Melting (SLM) process is investigated. The specimens are exposed to salt solution attack (5% NaCl) atomized in uniform droplets, inside a controlled Salt Spray Test (SST) chamber for 1000 h. The surface morphology of the specimens exposed to different predefined exposure times (0 h, 6 h, 48 h, 168 h, 480 h and 1000 h) are investigated under Scanning Electron Microscope (SEM). The SEM micrographs shows the salient features of the corrosion attack such as the formation both of pits and corrosion products on samples surface in different exposure times in the SST chamber. Similarly, the Acoustic Emission (AE) signals generated during the corrosion process are recorded for the different exposure times. The AE waveforms are studied using advanced waveform processing techniques. The waveforms, in their time-frequency domain, provide detailed information on the characteristic features of the acoustic source. The different AE sources have been characterized from the time-frequency analysis of the waveforms.

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Section: Corrosion Behavioursupporting

confidence: 90%

Section: Corrosion Behavioursupporting

confidence: 88%

Corrosion Resistance Behaviour of recycled AlSi10Mg alloy: Surface Morphology and Acoustic Emission Investigation

Barile

Casavola

Vimalathithan

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…By defining the process parameters, the porosity levels of the sintered part are maintained [140]. By comparing the residual stress test with destructive evaluation and non-destructive evaluation (neutron diffraction method), it is evident that the deformation is predominantly visible on the prism specimens built in the horizontal direction and more confined on vertically built.…”

Section: Laser Powder Bed Fusion Additive Manufacturingmentioning

confidence: 99%

Conventional and Additively Manufactured Stainless Steels: A Review

Michla

Rajini

Krishnasamy

et al. 2021

Trans Indian Inst Met

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For the last three decades, enormous manufacturing processes have been widely employed in the field of transportation (aviation, automobile and marine) as well as various industrial sectors. Among the invented techniques, conventional manufacturing plays a versatile and cost effective role, but additive manufacturing (AM) possesses a more significant advantage of handling complicated parts or complex geometrical structures. The conventional processes were used from ancient times until the development of other advanced techniques. In recent development of technology, AM technology has shown a tremendous change in the manufacturing field. The process of development in AM began with polymers, then to composites and advanced to nanocomposites, continuously. AM provides a waste-free production management system with enhanced processes. Therefore, this detailed and compendious review describes the different stainless steels fabricated through conventional and AM techniques. It is evident that AM proves better than other several conventional techniques, by three dimensional (3D) printing of quality and complex stainless steels components that are impossible to manufacture through other methods. Notwithstanding, there still need of much efforts to improve AM technique by reducing the manufacturing cost, supporting mass production and printing large stainless steel components.With an increase in invention of various efficient state-of-the-art engineering software, robots in manufacturing, artificial intelligence and smart manufacturing, the aforementioned drawbacks of AM technique/3D printing of various stainless steel structures will be soon eradicated.

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“…Therefore, to use the recycled powder in the fabrication of new parts, particularly in aerospace industries, in which quality control and standardisation is of high importance, it is necessary that the mechanical and corrosion properties should be comparable to parts produced using certified virgin powders. Recently, a wide variety of metal components are fabricated using different feed material such as alloy 718 by Ardila et al [2], sintered stainless steel by Renna et al [8], 2024 Al alloy by Tan et al [9] and AlSi10Mg by Yusuf et al [1] using SLM. Campbell [10] and Renna et al [11] have argued that in aeronautical industries, the Al alloys are among the lightweight materials most commonly employed for producing complexshaped components.…”

Section: Introductionmentioning

confidence: 99%

The influence of AlSi10Mg recycled powder on corrosion-resistance behaviour of additively manufactured components: mechanical aspects and acoustic emission investigation

Barile

Casavola

Kannan

et al. 2022

Archiv.Civ.Mech.Eng

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The effects of using recycled AlSi10Mg aluminium alloy powders on the mechanical properties and the corrosion-resistance behaviour of the components manufactured via selective laser melting (SLM) were analysed. The microstructural results show that the utilisation of recycled powder causes coarsening of interdendritic Si-network, especially along the melt pool boundaries of the SLM specimens. The corrosion resistance of the samples was evaluated by means of neutral salt spray (NSS) tests for 1000 h and mass loss measurements. The corrosion behaviour, in terms of surface roughness, density and porosity, however, remains almost the same between the samples produced by virgin and recycled powder. In addition to this, a passive NDE tool has been used to investigate and study the impact of powders on the corrosion performance of the alloy: Acoustic Emission (AE) technique. SEM observations allowed to highlight the morphological differences in the surface of the test specimens induced by the exposure condition. Thus, it was possible to correlate the AE results to corrosion mechanisms activated on the surfaces of the test specimen. A good correlation between the corrosion-resistance behaviour and the AE test results were obtained. Finally, the mechanical properties before and at the end of the accelerated corrosion were evaluated according to the yield strength, tensile strength, and elongation at breakage. The results showed comparable mechanical properties for the samples produced using both virgin and recycled powders. Besides, no notable influence of the exposure to corrosive environment on the mechanical performance was observed.

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Analysis of corrosion on sintered stainless steel: Mechanical and physical aspects

Cited by 15 publications

References 13 publications

Corrosion Resistance Behaviour of recycled AlSi10Mg alloy: Surface Morphology and Acoustic Emission Investigation

Corrosion Resistance Behaviour of recycled AlSi10Mg alloy: Surface Morphology and Acoustic Emission Investigation

Conventional and Additively Manufactured Stainless Steels: A Review

The influence of AlSi10Mg recycled powder on corrosion-resistance behaviour of additively manufactured components: mechanical aspects and acoustic emission investigation

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