Laser Welding of SLM-Manufactured Tubes Made of IN625 and IN718

Jokisch, Torsten; Marko, Angelina; Gook, Sergej; Üstündağ, Ömer; Gumenyuk, Andrey; Rethmeier, Michael

doi:10.3390/ma12182967

Cited by 21 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To obtain larger parts, one solution is to weld small parts. Laser welding enables a high-power density for a low-heat-energy input and high cooling rates [12,13]. These welding characteristics make it possible to weld thin parts, such as those obtained by SLM.…”

Section: Aisi 316l (316lmentioning

confidence: 99%

See 1 more Smart Citation

Laser Welding of AISI 316L Stainless Steel Produced by Additive Manufacturing or by Conventional Processes

Mokhtari

Pommier

Balcaen

et al. 2021

JMMP

View full text Add to dashboard Cite

Among all the additive manufacturing techniques, Laser Powder Bed Fusion (LBPF), also called Selective Laser Melting (SLM), is the most common technique due to its high capability of building complex parts with generally improved mechanical properties. One of the main drawbacks of this technique is the sample size limitation, which depends on elaborating chamber dimensions. In this study, we investigate the viability of obtaining large parts with the laser welding of additive manufactured plates. A comparison of the microstructure and the tensile mechanical properties of SLM-welded plates and cold-rolled welded plates was performed. This paper shows the possibility of obtaining defect-free parts. Even if welding has a low impact on the microstructure of the SLM samples, fractures are located on the fusion zone, and a decrease in ductility of around 30% compared to the base metal is observed.

show abstract

Section: Aisi 316l (316lmentioning

confidence: 99%

“…Moreover, the SLM and new welding lasers exploit the same technique (Yb: YAG); therefore, the same laser-matter interaction is expected. These similarities may minimize microstructure changes in samples produced by SLM [12]. Therefore, laser welding is a promising technique by which to join small additive manufactured parts.…”

Section: Aisi 316l (316lmentioning

confidence: 99%

Laser Welding of AISI 316L Stainless Steel Produced by Additive Manufacturing or by Conventional Processes

Mokhtari

Pommier

Balcaen

et al. 2021

JMMP

View full text Add to dashboard Cite

show abstract

“…The adaptation of the welding technology of the longitudinal weld to the circumferential weld required correction at the end of the weld. For this purpose, the known approach of reducing the power was used, described, e.g., by Jokisch et al [47]. A circular, symmetrical weld without undercuts, pores, and cracks is visible.…”

Section: Examination a Container Prototypementioning

confidence: 99%

Laser welding of austenitic ferrofluid container for the KRAKsat satellite

Janiczak

Pańcikiewicz

2021

Weld World

View full text Add to dashboard Cite

The production of a ferrofluid container, intended for use in the KRAKsat (CubeSat type) satellite in space conditions, is presented. Mechanized laser beam welding for AISI 316L stainless steel test joint and container prototype was developed and tested. The welded test joints were examined by non-destructive visual, penetration and radiographic testing and destructive testing by macro- and microscopic examination, static tensile test, static bending test, and hardness measurements. The welded container prototype was examined by leak test, temperature-vacuum test and vibration test. Test joints’ evaluation showed a proper selection of welding parameters and expected quality of joints. Austenitic microstructure with small δ-ferrite content in base materials, heat-affected zones, and welds guarantees sufficient mechanical properties for this part geometry. The tensile strength range of test joints was 687–729 MPa, hardness range was 140–200 HV3, and the bending angle was 180°. Welding of the prototype container and testing of tightness, resistance to temperature changes, and vibration were successful. Compliance with flywheel design and manufacturing requirements will enable the launch of a research satellite into orbit with such a wheel.

show abstract

“…Moreover, high heat inputs led to low weld quality, whereas slower welding speeds resulted in welds with higher quality. Jokish et al 11 demonstrated the general applicability of laser beam welding for joining SLM tube connections made of nickelbased alloys. However, numerous weld defects were observed, e.g.…”

Section: Introductionmentioning

confidence: 99%

Adhesively bonded joints in components manufactured via selective laser melting

Koch

Richter

Vollmer

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Additive manufacturing has gained increasing attention in recent years in numerous industrial sectors due to its inherent characteristics, e.g. tool-free production and unprecedented freedom of design. However, in some applications such as heat exchangers the design has to follow certain restrictions, e.g. to allow for the removal of unfused powder, which can be enclosed in cavities. Moreover, in case multi-material parts are considered, the use of different powders during processing is often uneconomical since powder recycling is highly challenging. Therefore, the production of complex structures being characterized by limited accessibility and components made of different materials often require a subsequent joining process. Based on an analysis of state-of-the-art joining technologies employed for additively manufactured metal components, research gaps related to adhesive bonding are deduced. In light of the prevailing gaps, the influence of selective laser melting process parameters like laser power and build direction on the surface topography and, thus, on the bondability of the substrates are investigated. The mechanical tests reveal a high bond strength for the vertically oriented samples and the samples manufactured with a laser power of 400 W. Furthermore, a laser post-treatment of the SLM samples lead to an improvement of lap shear strength. Finally, results reporting on the ageing behaviour of these joints and an outlook on further research activities are given.

show abstract

Laser Welding of SLM-Manufactured Tubes Made of IN625 and IN718

Cited by 21 publications

References 16 publications

Laser Welding of AISI 316L Stainless Steel Produced by Additive Manufacturing or by Conventional Processes

Laser Welding of AISI 316L Stainless Steel Produced by Additive Manufacturing or by Conventional Processes

Laser welding of austenitic ferrofluid container for the KRAKsat satellite

Adhesively bonded joints in components manufactured via selective laser melting

Contact Info

Product

Resources

About