TY - JOUR
T1 - Mechanism of simultaneous improvement of mechanical performance and conductivity of TiC/Cu composites prepared by laser powder bed fusion
AU - Zhang, Xinru
AU - Gao, Jianbao
AU - Zhang, Jinliang
AU - Zhang, Lei
AU - Song, Bo
AU - Shi, Yusheng
PY - 2024/10/15
Y1 - 2024/10/15
N2 - It is difficult to fabricate dense and high-performance pure copper with most commercial medium-power fiber laser additive manufacturing machines due to its high laser reflection and thermal conductivity. The modification of the copper surface with high laser absorptance particles is an economical and effective way. However, the additions of high laser absorptance particles improve mechanical performance but worsen the conductivity of copper, and the mechanism is unclear. In this work, a comprehensive investigation of the effect of TiC nanoparticles and different copper powder sizes on the densification behavior, microstructures, mechanical properties, and electrical conductivity of LPBF-processed copper was completed. The results showed that the coarse copper powder (CCP) with TiC nanoparticles had a better adaption to processing parameters. Under the same process condition, a relative density of 98.8 ± 0.3%, ultimate tensile strength of 213 ± 1 MPa, elongation of 30.9 ± 2.9%, and electrical conductivity of 67.9 ± 0.2% IACS were achieved in CCP composite which was all superior to the fine one. The paper provides a new strategy to fabricate balanced-performance copper by common commercial LPBF devices. © 2024 Published by Elsevier B.V.
AB - It is difficult to fabricate dense and high-performance pure copper with most commercial medium-power fiber laser additive manufacturing machines due to its high laser reflection and thermal conductivity. The modification of the copper surface with high laser absorptance particles is an economical and effective way. However, the additions of high laser absorptance particles improve mechanical performance but worsen the conductivity of copper, and the mechanism is unclear. In this work, a comprehensive investigation of the effect of TiC nanoparticles and different copper powder sizes on the densification behavior, microstructures, mechanical properties, and electrical conductivity of LPBF-processed copper was completed. The results showed that the coarse copper powder (CCP) with TiC nanoparticles had a better adaption to processing parameters. Under the same process condition, a relative density of 98.8 ± 0.3%, ultimate tensile strength of 213 ± 1 MPa, elongation of 30.9 ± 2.9%, and electrical conductivity of 67.9 ± 0.2% IACS were achieved in CCP composite which was all superior to the fine one. The paper provides a new strategy to fabricate balanced-performance copper by common commercial LPBF devices. © 2024 Published by Elsevier B.V.
KW - Copper composition
KW - Electrical conductivity
KW - Laser powder bed fusion
KW - Mechanical properties
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=85197625560&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85197625560&origin=recordpage
U2 - 10.1016/j.jallcom.2024.175281
DO - 10.1016/j.jallcom.2024.175281
M3 - RGC 21 - Publication in refereed journal
SN - 0925-8388
VL - 1002
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 175281
ER -