Metallographic study of denudation in laser powder-bed fusion

Khmyrov, Roman; Ableeva, R.R.; Gusarov, A.V.

doi:10.1016/j.procir.2020.09.037

Cited by 7 publications

(2 citation statements)

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“…The main contributions are related to the control of process parameters, to include the heated platform (generally increasing the temperature of the medium can reduce the thermal stress), adding Si (to aluminum alloy or or Mn (for Hastelloy-X) can reduce the cracking susceptibility, hot isostatic pressing can be used to close pores and cracks (applying heat treatment after to improve the resulting microstructure). Another disturbance such as denudation has been metallographic characterized (Khmyrov et al, 2020) and computationally modeled (Chen and Yan, 2020) to study the relationship between the material and particle size with the width of this so-called "denuded zone" and also to reproduce dynamic behavior of the gas phase and powder particles.…”

Section: Feedstock Materials Used In the Selective Laser Melting Processmentioning

confidence: 99%

“…Additionally, other phenomena associated with the interaction between the laser and the metallic powder have been studied. First, the "spattering," which occurs when some particles near the laser spot are blown up and also "denudation" disturbance that happens when the metallic particles are dragged to other areas of the powder bed, leading to an apparent clearing of powder around the lasermelted track (Chen and Yan, 2020;Khmyrov et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Selective laser melting: lessons from medical devices industry and other applications

Fé-Perdomo

Ramos‐Grez

Beruvides³

et al. 2021

RPJ

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Purpose The purpose of this paper is to outline some key aspects such as material systems used, phenomenological and statistical process modeling, techniques applied to monitor the process and optimization approaches reported. All these need to be taken into account for the ongoing development of the SLM technique, particularly in health care applications. The outcomes from this review allow not only to summarize the main features of the process but also to collect a considerable amount of investigation effort so far achieved by the researcher community. Design/methodology/approach This paper reviews four significant areas of the selective laser melting (SLM) process of metallic systems within the scope of medical devices as follows: established and novel materials used, process modeling, process tracking and quality evaluation, and finally, the attempts for optimizing some process features such as surface roughness, porosity and mechanical properties. All the consulted literature has been highly detailed and discussed to understand the current and existing research gaps. Findings With this review, there is a prevailing need for further investigation on copper alloys, particularly when conformal cooling, antibacterial and antiviral properties are sought after. Moreover, artificial intelligence techniques for modeling and optimizing the SLM process parameters are still at a poor application level in this field. Furthermore, plenty of research work needs to be done to improve the existent online monitoring techniques. Research limitations/implications This review is limited only to the materials, models, monitoring methods, and optimization approaches reported on the SLM process for metallic systems, particularly those found in the health care arena. Practical implications SLM is a widely used metal additive manufacturing process due to the possibility of elaborating complex and customized tridimensional parts or components. It is corroborated that SLM produces minimal amounts of waste and enables optimal designs that allow considerable environmental advantages and promotes sustainability. Social implications The key perspectives about the applications of novel materials in the field of medicine are proposed. Originality/value The investigations about SLM contain an increasing amount of knowledge, motivated by the growing interest of the scientific community in this relatively young manufacturing process. This study can be seen as a compilation of relevant researches and findings in the field of the metal printing process.

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Section: Feedstock Materials Used In the Selective Laser Melting Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%