Studies on pitting corrosion and sensitization in laser rapid manufactured specimens of type 316L stainless steel

Ganesh, P.; Giri, Raju; Kaul, R.; Sankar, P. Ram; Tiwari, Pragya; Atulkar, Ashok; Porwal, Rajesh Kumar; Dayal, R. K.; Kukreja, L. M.

doi:10.1016/j.matdes.2012.03.011

Cited by 98 publications

(54 citation statements)

References 24 publications

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“…Manufactured by 650 and 750 mm/s specimens have least corrosion rate after machining, austenitization leads to pitting corrosion susceptibility increasing. The contradiction with another works reported heat treatment positive influence on corrosion resistance of stainless steels due to residual stresses reduce, segregation removal [7] can explain at first cold working layer presence and second mass loss measurement error due to difficult removing of product corrosion from subsurface pitting.…”

Section: Fig 3 Scanning Speed Influence On Porosity Of Sl-melted Stcontrasting

confidence: 65%

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Development of new approaches to the study of pitting corrosion resistance of stainless steels obtained by selective laser melting

et al. 2019

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This paper presents the results of comparative corrosion resistance studies of stainless steels manufactured by selective laser melting (SLM) in the initial state with subsequent heat treatment and machining. Pitting corrosion tests are carried out, according to ASTM G48 method A in 10% FeCl3·6H2O solution at elevated temperature and exposure time for 5h. The studies were performed on the AISI 321 and AISI 316L stainless steels manufactured by SLM. It was obtained that laser scanning speed decrease led to density rise by other SLM parameters being equal. Porosity affected to the stainless steel corrosion behaviour significant. Metal density decrease resulted to corrosion rate rise. Microstructure examination showed that pitting corrosion development depended on surface steel condition.

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Section: Fig 3 Scanning Speed Influence On Porosity Of Sl-melted Stcontrasting

confidence: 65%

“…Corrosion resistance of stainless steels obtained by SLM reducing is explained by pores presence [4][5][6], segregation, cast structure or residual stresses [4,[6][7][8][9].…”

Section: Discussionmentioning

confidence: 99%

Development of new approaches to the study of pitting corrosion resistance of stainless steels obtained by selective laser melting

et al. 2019

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“…As an example, it is commonly reported that selective laser melted 316L stainless steel displays a higher corrosion resistance than a traditional wrought material with comparable chemical composition . Nevertheless, it is also reported in some cases that as produced SLM stainless steel exhibits lower corrosion resistance than the wrought counterpart due to its complex microstructure or to the presence of defects related to the SLM process . From the cited literature, it is clear that process parameters play a key role in controlling the corrosion behaviour of SLM stainless steel, as well as for its microstructure and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of 316L stainless steel manufactured by selective laser melting

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Vaglio

et al. 2019

Materials & Corrosion

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This work investigates the electrochemical behaviour of an AISI 316L stainless steel produced by selective laser melting (SLM) and compares its behaviour with that of wrought stainless steel with similar chemical composition. The SLM stainless steel specimens are tested in the as‐produced condition without stress relief or recrystallization heat treatments. The electrochemical tests are carried out in two electrolytes: 3.5 wt% NaCl solution with neutral pH and with pH of 1.8. At the macroscale, the microstructure of the SLM specimens is determined by the laser scanning pattern and displays an overlapping network of melt pools. At the microscale, the SLM specimens exhibit a cellular/columnar dendritic structure with submicrometric cell size. Electrochemical measurements highlight a more extended passive range for SLM stainless steel in both neutral and acid electrolytes indicating higher protective properties of the oxide film on SLM specimens. In contrast to the wrought material, the refined microstructure of the SLM specimens promotes a very shallow morphology of attack without deep penetration in the bulk.

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“…For example, Mahmood and Pinkerton [21] investigate the role that particle size and morphology have in determining the final characteristics of a stainless steel 316L part produced by laser direct rapid manufacturing. Ganesh et al [22] study the pitting corrosion and sensitization in laser rapid manufactured stainless steel 316L specimens and make a comparison with its wrought and weld deposited counterparts. Ma et al [23] address the control of shape and performance for the precision large-scale metal parts with stainless steel 316L by the similar technology.…”

Section: Introductionmentioning

confidence: 99%

Characterization of stainless steel parts by Laser Metal Deposition Shaping

et al. 2014

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Studies on pitting corrosion and sensitization in laser rapid manufactured specimens of type 316L stainless steel

Cited by 98 publications

References 24 publications

Development of new approaches to the study of pitting corrosion resistance of stainless steels obtained by selective laser melting

Development of new approaches to the study of pitting corrosion resistance of stainless steels obtained by selective laser melting

Corrosion behaviour of 316L stainless steel manufactured by selective laser melting

Characterization of stainless steel parts by Laser Metal Deposition Shaping

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