Unanticipated drastic decline in pitting corrosion resistance of additively manufactured 316L stainless steel after high-temperature post-processing

Laleh, Majid; Hughés, A.E.; Xu, Wei; Čížek, Pavel; Tan, Mike Yongjun

doi:10.1016/j.corsci.2019.108412

Cited by 90 publications

(51 citation statements)

References 28 publications

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“…However, the amount of NbC precipitates was not determined quantitatively, and this constitutes a difficult task considering, as said previously, the size of the precipitates. Nevertheless, such an hypothesis should be in agreement with the conclusions drawn by Laleh et al who showed a decline in pitting corrosion resistance of SLM 316 L SS after high-temperature post-processing, due to the formation of deleterious MnS inclusions [46]. Furthermore, comparison of E pit values between the wrought and the LBM samples, both in the H900 metallurgical state, seemed to confirm also the deleterious influence of NbCs, with more noble E pit values for LBM samples characterised by smaller NbCs as compared to the wrought MSS.…”

Section: Study Of the Stable Pitssupporting

confidence: 91%

Pitting corrosion of 17-4PH stainless steel manufactured by laser beam melting

et al. 2020

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The pitting corrosion behaviour of a 17-4PH martensitic stainless steel (MSS) manufactured by power bed laser beam melting (LBM) was compared to that of a wrought MSS. More noble pitting potentials were measured for LBM samples, probably due to a smaller size of NbCs as compared to wrought MSS. The metastable pits were less numerous, but had a higher nucleation rate and longer life time for the LBM samples compared to the wrought MSS. This was explained by assuming a decrease in the repassivation ability of LBM samples due to small gas pores.

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Section: Study Of the Stable Pitssupporting

confidence: 91%

Pitting corrosion of 17-4PH stainless steel manufactured by laser beam melting

et al. 2020

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“…Distribution of corrosion studies in terms of stainless steel alloy, process, and environment. [2][3][4][5][6][7]10,[18][19]27,29,37,[47][48][49][50][51][53][54]57,[68][69]76,[91][92][101][102][103][104][105]109,116,129,134,137,144,[146][147][148][149]153,178,[185][186][187][188][189][190][191][192][193][194]…”

Section: Additive Manufacturing Processmentioning

confidence: 99%

“…Several studies have shown that LOF voids can serve as strong preferential sites for corrosion attack and control the breakdown potential to the first order. [18][19][101][102][103][104] 0.6 M NaCl was exclusively due to crevice corrosion occurring within the LOF voids, Figure 11. 101 They further demonstrated that by excluding lack of fusion pores, the pitting resistance of the material could be restored to that similar of wrought H900 17-4 PH.…”

Section: Bulk Defectsmentioning

confidence: 99%

“…145 Considerable amounts of oxides and Mn-S-rich nanoscale particles have been reported to precipitate at solution annealing temperatures. 146 Several studies have found that high-temperature annealing (>1,100°C) can considerably decrease the corrosion resistance of SLM 316L in neutral chloride media. 2,129,[146][147] Comparing as-built and high-temperature stress-relieved (1,100°C for 5 min) SLM 316L, Chao, et al, reported comparable anodic polarization behavior but consistently lower pitting potential of the annealed material (0.56 V SCE vs. 0.74 V SCE ).…”

Section: Heat Treatmentmentioning

confidence: 99%

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Corrosion of Additively Manufactured Stainless Steels—Process, Structure, Performance: A Review

Schindelholz

Rodelas

2021

Corrosion

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The corrosion of additively manufactured (AM) metallic materials, such as stainless steels (SS), is a critical factor for their qualification and reliable use. This review assesses the emerging knowledgebase of powder-based laser AM SS corrosion and environmentally assisted cracking (EAC). The origins of AM-unique material features and their hierarchal impact on corrosion and EAC are addressed relative to conventionally processed SS. The effects of starting material, heat treatment and surface finishing are substantively discussed. An assessment of the current status of AM corrosion research, scientific gaps and research needs with greatest impact for AM SS advancement and qualification is provided.

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“…Components have been manufactured employing a laser powder bed fusion process (L-PBF), which involves the use of laser to selectively melt metal powder located within a powder bed, delivered on a substrate plate by means of a roller. The analysis of tribological behaviour has been carried out in saline conditions [11,12] in order to assess the performance of surface modified samples through machining and burnishing with respect to as printed ones, using the same material as counterpart in line with studies in literature [9,10].…”

Section: Intr Introduction Oductionmentioning

confidence: 99%

On the Effects of Burnishing Process on Tribological Surface Resistance of Additively Manufactured Steel

Saffioti¹,

Sanguedolce²,

Rotella³

et al. 2021

Esaform 2021

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Burnishing is a Severe Plastic Deformation process having the potential to replace expensive finishing post processes. It is considered a super finishing process due to its results in terms of drastic roughness reduction. Also, additional advantages include the surface integrity improvement functionalized to the specific application. Even though burnishing is widely applied for surface improvement of conventional materials, knowledge about its effect on additively manufactured metals is still limited. This paper aims to fill this gap presenting experiments on roller burnishing on additively manufactured stainless steel in order to improve its tribological performance. The experimental campaign was carried out to find suitable process parameters able to drastically improve the tribological behavior of the final product. In particular, the influence of the burnishing forces on the whole surface quality has been addressed. The overall results demonstrate that the selected burnishing configuration is able to successfully modify the surface characteristics of the steel, making it appropriate for critical applications. Furthermore, the experimental findings allow to conclude that burnishing process can replace a series of post processes needed after additive manufacturing, drastically reducing the time and costs associated to the manufacturing process and meeting Industry 4.0 requirements.

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Unanticipated drastic decline in pitting corrosion resistance of additively manufactured 316L stainless steel after high-temperature post-processing

Cited by 90 publications

References 28 publications

Pitting corrosion of 17-4PH stainless steel manufactured by laser beam melting

Pitting corrosion of 17-4PH stainless steel manufactured by laser beam melting

Corrosion of Additively Manufactured Stainless Steels—Process, Structure, Performance: A Review

On the Effects of Burnishing Process on Tribological Surface Resistance of Additively Manufactured Steel

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