Effects of electromagnetic field on the laser direct metal deposition of austenitic stainless steel

Lu, Yi; Zhandong, Wang; Zhang, Yongkang; Su, Boyong; Feng, Aixin; Zhang, Ni

doi:10.1016/j.optlastec.2019.105586

Cited by 14 publications

(8 citation statements)

References 44 publications

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“…Table 4 summarises the solidification mode and resultant microstructure of some austenitic stainless steels produced by the DED process under different conditions [40,[106][107][108][109][110][111][112][113][114][115][116][117][118][119][120][121][122]. In these studies, a precise determination of microstructure constituents, e.g.…”

Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

“…Systematic studies on the type 316L DED builds recognised austenite as the primary solidifying phase (A and AF modes) [106][107][108][109][110][111][112][113][114][115][116][117][118][119][125][126][127][128][129][130][131][132][133][134][135][136]. A series of builds represented austenitic microstructures with none or negligible amounts of ferrite [109,112,115,117,118,[130][131][132][133].…”

Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

“…Systematic studies on the type 316L DED builds recognised austenite as the primary solidifying phase (A and AF modes) [106–119,125–136]. A series of builds represented austenitic microstructures with none or negligible amounts of ferrite [109,112,115,117, 118,130–133].…”

Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

“…Moreover, manipulated solidification behaviour of stainless steels has also been reported in modulated DED processes such as high-power laser melting with an electromagnetic stirring module, where mixed AF + FA modes have been identified [113,114].…”

Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

See 3 more Smart Citations

Solidification behaviour of austenitic stainless steels during welding and directed energy deposition

Nedjad

Yıldız

Saboori

2022

Science and Technology of Welding and Joining

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The effect of cooling rate on the solidification behaviour of austenitic stainless steels during high energy density welding and directed energy deposition (DED) has been reviewed. Precedent studies demonstrated the confinement of austenite-ferrite duplex region and the susceptibility of specific alloy compositions on the Schaeffler diagram to alteration of solidification mode at high cooling rates during the high energy density welding. Meanwhile, mitigated cooling conditions have dominated during the DED process. The instances of microstructural fluctuations owing to cooling rate variation have been compiled. The incorporation of DED steels into the implicated Schaeffler diagrams demonstrated reliable predictions at high cooling rates. The printability of austenitic stainless steels during the DED process has been discussed in terms of solidification cracking susceptibility.

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Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

Section: Solidification Mode Of Stainless Steels Produced By the Dedmentioning

confidence: 99%

See 2 more Smart Citations

Solidification behaviour of austenitic stainless steels during welding and directed energy deposition

Nedjad

Yıldız

Saboori

2022

Science and Technology of Welding and Joining

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“…Wettability of solder droplet can be enhanced in some external conditions, like an electric/electromagnetic or an infrared laser field 23 . A significant evidence of wettability enhancement is the contact angles being decreased.…”

Section: Introductionmentioning

confidence: 99%

The Morphology of al Droplet in an Ultrasonic Oscillation Field: Kinetic and Equilibrium Thermodynamic Analysis

Liang

Yang

et al. 2023

Mat. Res.

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Wetting of metal droplet on the solid substrate is a fundamental phenomenon which is applicable to the surface chemistry. When an oscillation field is included in the wetting condition, the wetting process shows significant advancing and receding behaviors. Also, the use of ultrasonic oscillation field is promising in welding. However, some odd morphologies led by the ultrasonic-treatment have shown wetting kinetics which have not been fully investigated.The high frequency ultrasonic vibration brings hysteresis to the contact angle, whose extra energy is attributed by the oscillation field. The ultrasonic wetting process is excited by the 20 kHz frequency periodic oscillation, during which droplet is swaying cyclically. However, after capturing the transformation of droplet morphologies, it is found that the frequency of each swaying cycle is identified to be 180 ms. Theoretical investigations have also quantitively proved that the energy for the contact angle decrease origins from the ultrasonic field, and the wettability is in a great enhancement. Thermal and kinetic effects of ultrasonic are investigated by making theoretical calculations, the 20 kHz ultrasonic field lasting for 5 seconds. Thermodynamics, vibrational mechanics, and interfacial phenomena affect the sonochemistry of wetting.

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Review on Fatigue of Additive Manufactured Metallic Alloys: Microstructure, Performance, Enhancement, and Assessment Methods

Liu,

Yu,

Guo

et al. 2023

Advanced Materials

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Additive manufacturing (AM), which is a process of building objects in a layer‐upon‐layer fashion from designed models, has received unprecedented attention from research and industry because it offers outstanding merits of flexibility, customization, reduced buy‐to‐fly ratio, and cost‐effectiveness. However, the fatigue performance of safety‐critical industrial components fabricated by AM is still far below that obtained from conventional methods. This review discusses the microstructural heterogeneities, randomly dispersed defects, poor surface quality, and complex residual stress generated during the AM process that can negatively impact the fatigue performance of as‐printed parts. The difference in microstructural origin of fatigue failure between conventionally manufactured and printed metals is reviewed with particular attention to the effects of the trans‐scale microstructures on AM fatigue failure mechanisms. Various methods for mitigating the fatigue issue, including pre‐process, inter‐process and post‐process treatments, are illustrated. Empirical, semi‐empirical and microstructure‐sensitive models are presented to predict fatigue strength and lifetime. Summary and outlooks for future development of the fatigue performance of AM materials are provided.This article is protected by copyright. All rights reserved

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Effects of electromagnetic field on the laser direct metal deposition of austenitic stainless steel

Cited by 14 publications

References 44 publications

Solidification behaviour of austenitic stainless steels during welding and directed energy deposition

Solidification behaviour of austenitic stainless steels during welding and directed energy deposition

The Morphology of al Droplet in an Ultrasonic Oscillation Field: Kinetic and Equilibrium Thermodynamic Analysis

Review on Fatigue of Additive Manufactured Metallic Alloys: Microstructure, Performance, Enhancement, and Assessment Methods

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