Comparative study on microstructure and corrosion performance of 316 stainless steel prepared by laser melting deposition with ring-shaped beam and Gaussian beam

Lei, Jianbo; Xie, Jichang; Zhou, Shengyuan; Song, Heyu; Song, Xinling; Zhou, Xiaoshu

doi:10.1016/j.optlastec.2018.09.057

Cited by 41 publications

(17 citation statements)

References 33 publications

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“…Moreover, a thicker aluminium oxide film was obtained on the SLMed 2024 aluminium alloy in comparison to that on the wrought counterpart. 178 Fe-based alloys Austenitic stainless steels (such as 304L and 316L) can still exhibit a complete austenitic phase after SLM fabrication, 37,179,180 but the ferrite phase can be formed during laser melting deposition (with a slower cooling rate compared with SLM). 8,[181][182][183] In the SLMed 316L stainless steel, there were many dislocation cells inside the grain, which led to a higher hardness and strength in comparison to the wrought counterpart.…”

Section: Al-based Alloysmentioning

confidence: 99%

Corrosion of metallic materials fabricated by selective laser melting

Kong

2019

npj Mater Degrad

182

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Additive manufacturing is an emerging technology that challenges traditional manufacturing methods. However, the corrosion behaviour of additively manufactured parts must be considered if additive techniques are to find widespread application. In this paper, we review relationships between the unique microstructures and the corresponding corrosion behaviour of several metallic alloys fabricated by selective laser melting, one of the most popular powder-bed additive technologies for metals and alloys. Common issues related to corrosion in selective laser melted parts, such as pores, molten pool boundaries, surface roughness and anisotropy, are discussed. Widely printed alloys, including Ti-based, Al-based and Fe-based alloys, are selected to illustrate these relationships, and the corrosion properties of alloys produced by selective laser melting are summarised and compared to their conventionally processed counterparts.

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Section: Al-based Alloysmentioning

confidence: 99%

Corrosion of metallic materials fabricated by selective laser melting

Kong

2019

npj Mater Degrad

182

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“…Titanium alloys are very popular material for AM and very well understood along with austenitic stainless steels such as AISI 304 and 316 [19][20][21][22][23][24][25]. There are a very few studies available for duplex stainless steel (22Cr5Ni) consisting of approximately 50% ferrite and 50% austenite.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process

Lervåg

Sørensen

Robertstad

et al. 2020

Metals

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For many years, the oil and gas industry has utilized superduplex stainless steels due to their high strength and excellent corrosion resistance. Wire arc additive manufacturing (WAAM) was used with superduplex filler wire to create walls with different heat input. Due to the multiple heating and cooling cycles during layer deposition, brittle secondary phases may form such as intermetallic sigma (σ) phase. By inspecting deposited walls within wide range of heat inputs (0.40–0.87 kJ/mm), no intermetallic phases formed due to low inter-pass temperatures used, together with the high Ni content in the applied wire. Lower mechanical properties were observed with high heat inputs due to low ferrite volume fraction, precipitation of Cr nitrides and formation of secondary austenite. The walls showed good toughness values based on both Charpy V-notch and CTOD (crack tip opening displacement) testing.

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“…The experiments are conducted at constant a sliding distance of 1000 m at different values of normal load (10, 20, and 30 N) and sliding velocity (0.5, 0.75, and 1 m/s). Wear volume is estimated using equation (1), and SWR is calculated using equation (2). Scanning electron microscopy (SEM) is used to analyze the worn surface to understand the wear mechanism.…”

Section: Methodsmentioning

confidence: 99%

“…LAM is being used for various industrial applications such as aerospace, automotive, electronic, chemical, and biomedical. 1,2 The major advantage it brings to the present industrial manufacturing scenario is the fabrication of complex shapes in its entirety without any dedicated tool, with minimum production time and minimal material wastage. Thus, it eliminates the need for complex assemblies for building complex shapes and also provides design flexibility for building geometries not possible by conventional manufacturing techniques.…”

Section: Introductionmentioning

confidence: 99%

Parametric investigation and characterization on SS316 built by laser-assisted directed energy deposition

Benarji

Kumar

Paul

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the present work, parametric investigation and characterization of stainless steel 316 (SS316) built by laser-assisted directed energy deposition (L-DED) is performed. Single-track L-DED experiments are carried by varying laser power, scanning speed, and powder feed rate using full factorial experimental design. The effect of L-DED process parameters on the track geometry, deposition rate, and microhardness is investigated, and three different combinations of process parameters yielding maximum deposition rate and hardness are identified for bulk investigation. The identified process parameters are laser power of 1000 W, powder feed rate of 8 g/min, and scanning speed of 0.4 m/min, 0.5 m/min, and 0.6 m/min. The austenitic phase [Formula: see text] is detected at all the conditions. However, ferrite [Formula: see text] peak is observed at 0.6 m/min due to microsegregation and thermal gradients. The minimum crystallite size is estimated to be 24.88 nm at 0.6 m/min. The porosity and microstructure analysis is carried out by optical microscopic images. The fine columnar dendritic structure is observed in L-DED samples at all conditions. An average microhardness of 317.4 HV0.98 N is obtained at 0.4 m/min, and it is observed that microhardness reduces with an increase in scanning speed mainly due to increase in lack of fusion and porosity. Tribology studies are carried out at different values of normal load and sliding velocity. The minimum specific wear rate of 0.02497 × 10−4 mm3/Nm is observed at scanning speed of 0.4 m/min. Scanning electron microscope of the wear tracks analysis shows abrasive wear as the major wear mechanism. This study provides a path for building SS316 components for various engineering applications.

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Comparative study on microstructure and corrosion performance of 316 stainless steel prepared by laser melting deposition with ring-shaped beam and Gaussian beam

Cited by 41 publications

References 33 publications

Corrosion of metallic materials fabricated by selective laser melting

Corrosion of metallic materials fabricated by selective laser melting

Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process

Parametric investigation and characterization on SS316 built by laser-assisted directed energy deposition

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