Microstructure and mechanical properties of pure copper manufactured by selective laser melting - Université de technologie de Troyes Accéder directement au contenu
Article Dans Une Revue Materials Science and Engineering: A Année : 2020

Microstructure and mechanical properties of pure copper manufactured by selective laser melting

Résumé

Selective laser melting (SLM) was used to fabricate copper samples under various processing parameters. The influence of laser linear energy density on the microstructures and mechanical properties of the SLM copper samples were investigated theoretically and experimentally. Based on the results, the optimal linear energy density that can result in the best relative density (99.10 ± 0.5%) and surface roughness (Ra = 12.72 ± 4.54 μm) was determined to be 0.50 J/mm which corresponds to the laser power and scanning speed of 200 W and 400 mm/s, 300 W and 600 mm/s, respectively. Under the optimal processing conditions, the microhardness and strength (i.e., yield strength and ultimate tensile strength) of the copper sample achieved the highest value. In addition, it is also found that the microstructure of the SLM pure copper samples was characterized by polycrystalline grains with columnar dendrites and equiaxed structures dispersed inside. The grain size showed a decreasing trend as linear energy density increased due to the improved intrinsic heat treatment effect. The paper proves that nearly full dense copper with desirable mechanical properties can be fabricated through SLM.
Fichier principal
Vignette du fichier
S0921509320306936.pdf (3.5 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02626528 , version 1 (22-08-2022)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

Citer

Xingchen Yan, Cheng Chang, Dongdong Dong, Shuohong Gao, Wenyou Ma, et al.. Microstructure and mechanical properties of pure copper manufactured by selective laser melting. Materials Science and Engineering: A, 2020, 789, pp.139615. ⟨10.1016/j.msea.2020.139615⟩. ⟨hal-02626528⟩
223 Consultations
43 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More