Directed energy deposition processes and process design by artificial intelligence

Guimarães, Rafael Paiotti Marcondes; Pixner, Florian; Enzinger, Norbert; Belei, Carlos; Effertz, Pedro dos Santos; Amancio‐Filho, Sergio T.

doi:10.1016/b978-0-323-91230-3.00006-8

Cited by 3 publications

(3 citation statements)

References 164 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CMT relies on filler wire (electrode) short-circuit and precise wire control for material transfer, which belongs to the metal inert gas (MIG) technology [ 74 , 75 ]. DED [ 76 ] involves melting metal powder using a focused laser or electron beam to add material to an existing structure [ 77 , 78 ]. Two of the most known subprocesses of DED, classified as direct metal deposition (DMD), are direct laser deposition (DLD) and DEBD.…”

Section: Literature Reviewmentioning

confidence: 99%

An In-Depth Exploration of Unconventional Machining Techniques for INCONEL® Alloys

Pedroso,

Sebbe,

Silva

et al. 2024

Materials

View full text Add to dashboard Cite

Build-up-edge (BUE), high-temperature machining and tool wear (TW) are some of the problems associated with difficult-to-machine materials for high-temperature applications, contributing significantly to high-cost manufacturing and poor tool life (TL) management. A detailed review of non-traditional machining processes that ease the machinability of INCONEL®, decrease manufacturing costs and suppress assembly complications is thus of paramount significance. Progress taken within the field of INCONEL® non-conventional processes from 2016 to 2023, the most recent solutions found in the industry, and the prospects from researchers have been analysed and presented. In ensuing research, it was quickly noticeable that some techniques are yet to be intensely exploited. Non-conventional INCONEL® machining processes have characteristics that can effectively increase the mechanical properties of the produced components without tool-workpiece contact, posing significant advantages over traditional manufacturing.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

An In-Depth Exploration of Unconventional Machining Techniques for INCONEL® Alloys

Pedroso,

Sebbe,

Silva

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…8,9 In this sense, NiTi can be fast-produced using wire-based DED additive techniques. These techniques are wire-arc additive manufacturing 10,11 and electron beam freeform fabrication (EBF3). [12][13][14][15][16][17][18] The first work on EBF3 of NiTi was published by Dutkiewicz et al 12 The authors compared the physical properties, microstructural features and superelastic behaviour of Ni50.97Ti (at.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The electron beam freeform fabrication of NiTi shape memory alloys. Part II: Influence of the heat treatment on the superelastic behaviour

Guimarães,

Rauchdobler,

Pixner

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

In a previous study (part I), the deposition of functional single-track and multi-layer Ni-rich NiTi using the electron beam freeform fabrication (EBF3) technique was demonstrated. The processed microstructure consists of columnar millimetre range grains that grow parallel to the build direction. Based on the same parameters of part I, this work successfully deposited a stable multi-track and multi-layer NiTi block. Different heat treatments were applied to modify the superelastic properties of the deposited material. Initially, the solution treatment reduces the chemical inhomogeneity and the thermal stresses that originated during the deposition and cooling. Subsequently, due to ageing, Ni4Ti3 particles precipitate at 350 °C and 450 °C for 1, 6 and 12 h, modified the superelastic behaviour of the deposited NiTi. The differential scanning calorimetry results did not reveal any difference in the martensitic starting temperature between as-built and solution-treated samples. However, a remarkable influence of the ageing temperature was detected: while ageing at 350 °C impacted R-phase starting temperatures, 450 °C altered the martensitic starting one. The superelastic behaviour was evaluated by cycling compression. As-built and solution heat-treated samples presented poor mechanical performance, with about 40% of strain recovered after 10 cycles. The ageing at 350 °C for 1 h led to a maximum measured strain recovery of 72.5% after 10 uniaxial compression cycles up to 860 MPa. This condition also resulted in 3.3% permanent deformation out of 11.3% of the total. This study addressed for the first time the fabrication by the EBF3 technique of a stable multi-track and multi-layer NiTi block besides the importance of heat treating it, demonstrating that this post-treatment improves the superelastic performance of EBF3 fabricated parts.

show abstract

Performance of machine learning models to forecast PM10 levels

Mampitiya,

Rathnayake,

Hoshino

et al. 2024

MethodsX

View full text Add to dashboard Cite

Directed energy deposition processes and process design by artificial intelligence

Cited by 3 publications

References 164 publications

An In-Depth Exploration of Unconventional Machining Techniques for INCONEL® Alloys

An In-Depth Exploration of Unconventional Machining Techniques for INCONEL® Alloys

The electron beam freeform fabrication of NiTi shape memory alloys. Part II: Influence of the heat treatment on the superelastic behaviour

Performance of machine learning models to forecast PM10 levels

Contact Info

Product

Resources

About