High-fidelity modelling of selective laser melting copper alloy: Laser reflection behavior and thermal-fluid dynamics
dc.contributor.author | Ren, Z | |
dc.contributor.author | Zhang, DZ | |
dc.contributor.author | Fu, G | |
dc.contributor.author | Jiang, J | |
dc.contributor.author | Zhao, M | |
dc.date.accessioned | 2021-08-24T09:24:04Z | |
dc.date.issued | 2021-06-01 | |
dc.description.abstract | Despite of the promising capabilities of selective laser melting (SLM), the poor formability of copper and its alloys is a critical challenge for industrial applications, which is widely-believed attributed to the high reflectivity of copper. Due to the difficulty of observing laser reflections, current understanding on the laser reflection mechanisms is still vague and unclear. This work constructs a high-fidelity CFD model coupled with a ray-tracing method to visualize the flow kinetics and reflection behavior during SLM Cu-Cr-Zr alloy. Considering the material specificity of copper, a temperature-dependent absorption rule is introduced to overcome the simulation deviation caused by the widely-used Fresnel absorption, showing good agreement with experiments in terms of track width and depth. The in-situ absorptivity measurement experiments are further conducted to compare with simulations with the error less than 2%. Additionally, different reflection mechanisms for continuous and distorted tracks are revealed. At relatively high linear energy density (LED), the global absorptivity undergoes a rise and a decrease in the initial stage, and finally gets stable. At low LED level, the surface tension drives the melt pool to form isolated balls and exposed plat surface, which is responsible for the intense absorptivity oscillation as the balling effect occurs. | en_GB |
dc.description.sponsorship | Natural Science Foundation of Chongqing, China | en_GB |
dc.description.sponsorship | Fundamental Research Funds for the Central Universities | en_GB |
dc.description.sponsorship | Graduate Research and Innovation Foundation of Chongqing, China [grant number. | en_GB |
dc.description.sponsorship | Fundamental Research Funds for the Central Universities [2020JBZD012]. | en_GB |
dc.identifier.citation | Vol. 207, article 109857 | en_GB |
dc.identifier.doi | 10.1016/j.matdes.2021.109857 | |
dc.identifier.grantnumber | cstc2020jcyj-zdxmX0021 | en_GB |
dc.identifier.grantnumber | 0209005202109 | en_GB |
dc.identifier.grantnumber | GYB20011 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/126852 | |
dc.language.iso | en | en_GB |
dc.publisher | Elsevier | en_GB |
dc.rights | © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). | en_GB |
dc.subject | Selective laser melting | en_GB |
dc.subject | Ray-tracing method | en_GB |
dc.subject | Temperature-dependent absorption | en_GB |
dc.subject | Laser reflection | en_GB |
dc.subject | Copper | en_GB |
dc.title | High-fidelity modelling of selective laser melting copper alloy: Laser reflection behavior and thermal-fluid dynamics | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2021-08-24T09:24:04Z | |
dc.identifier.issn | 0264-1275 | |
dc.description | This is the final version. Available on open access from Elsevier via the DOI in this record | en_GB |
dc.identifier.journal | Materials and Design | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | en_GB |
dcterms.dateAccepted | 2021-05-29 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2021-06-01 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2021-08-24T09:15:43Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2021-08-24T09:24:09Z | |
refterms.panel | B | en_GB |
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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).