Effect of build geometry on the microstructural development of 316L parts produced by additive manufacturing

Leicht, Alexander; Klement, Uta; Hryha, Eduard

doi:10.1016/j.matchar.2018.04.040

Cited by 101 publications

(43 citation statements)

References 31 publications

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“…[27][28][29][30][31][32][33] The effects of process parameters of DLD on microstructure and mechanical properties can be found in previous studies. A great number of publications examine the effects of these process parameters on part quality for selective laser melting (SLM)/ direct metal laser sintering (DMLS) processes.…”

Section: Am Technology Backgroundmentioning

confidence: 97%

“…www.advancedsciencenews.com www.aem-journal.com a multiple-pass welding process ( Figure 9). [33,38] Here there is a narrow range of parameter combinations (power and scan speed) that provides a fully dense structure. There are a number of defects that are inherent to parts produced by AM.…”

Section: Microstructure Of Am Alloysmentioning

confidence: 99%

“…The properties of a material that has been additively manufactured are determined by the chemical and phase composition, grain size, and more importantly for AM parts the presence of defects such as pores, cracks, and surface roughness. Surface roughness (affected by powder size, powder flow rate in the laser metal deposition [LMD] process [120] ) also influences the fatigue behaviour [33] ; this is particularly important for parts with internal surfaces which are not accessible for machining. For SLM processes, these are the presence of unmelted/partially melted powder particles, lack of fusion between the layers, key holes, cracking/delamination, and gas entrapment.…”

Section: Microstructure Of Am Alloysmentioning

confidence: 99%

“…A great number of publications examine the effects of these process parameters on part quality for selective laser melting (SLM)/ direct metal laser sintering (DMLS) processes. [27][28][29][30][31][32][33] The effects of process parameters of DLD on microstructure and mechanical properties can be found in previous studies. [32][33][34][35][36][37][38]…”

Section: Am Technology Backgroundmentioning

confidence: 99%

“…[31] In addition to laser power, the scan speed is equally important, as shown in Figure 11. [33,38] Here there is a narrow range of parameter combinations (power and scan speed) that provides a fully dense structure. Surface roughness (affected by powder size, powder flow rate in the laser metal deposition [LMD] process [120] ) also influences the fatigue behaviour [33] ; this is particularly important for parts with internal surfaces which are not accessible for machining.…”

Section: Microstructure Of Am Alloysmentioning

confidence: 99%

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Laser‐Based Additive Manufacturing Technologies for Aerospace Applications

2019

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Additive manufacturing (AM) is a transformative technology that has rapidly grown over the past decade. AM processes build parts layer by layer and have found applications in the aerospace, biomedical, and automotive fields. The technology holds particular promise for the aerospace industry due to the reduced process time, weight savings of parts, and opportunities for new material development. Herein, a review of laser-based AM processes, existing AM systems, and aerospace parts being fabricated is presented. It further explores the material properties and microstructure of printed samples with both powder bed fusion and direct energy deposition processes. The benefits and challenges associated with the widespread use of the technology are discussed with emphases on the aerospace sector. Finally, the steps required for parts produced by AM processes to become certified for use in aerospace applications are presented.

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