A study on the mechanical and electrical properties of high-strength CuCrZr alloy fabricated using laser powder bed fusion

Performance Improvement for the CuCrZr Alloy Produced by Laser Powder Bed Fusion Using the Remelting Process

“…In addition to electrical conductivity, thermal conductivity is also one of the important parameters of copper alloys. The thermal conductivity of CuCrZr alloys is calculated using the Wiedmann-Franz law [21,25,26]:…”

“…Zhang et al [19] prepared a high-strength and highly conductive alloy using a high-power laser during the PBF-LB/M process and compared the microstructure, mechanical properties, and conductivity before and after heat treatment. Tidén et al [20] investigated laser bed fusion of Cu using graphene oxidecoated powder, which exhibited reduced reflectivity, improved printability, and increased densities using a laser power of 500 W. Tang et al [21] used a short-wavelength laser (515 nm) during the PBF-LB/M process, optimized the process parameters, and analyzed the mechanical and electrical properties based on improving the laser absorption rate of the powder. The efficiency of the remelting process between the layers and the absorption of laser energy increased with decreasing layer thickness and powder size.…”

Review on the Use of Machine Learning Techniques to Optimize the Processing of Copper Alloys in Additive Manufacturing

“…Yanting Liu 1 ,SweeLeongSing With the development of the times and the further increase in the performance requirements of the corresponding products, the processing difficulties for copper alloy products are also increasing.The advantages of L-PBF technology, such as rapid prototyping, low manufacturing costs and complex structures, are becoming more and more important and have therefore attracted extensive academic attention in recent years 5 .However, current research is relatively limited for copper alloys and the combination with L-PBF technology is still in the exploratory stage. There are needs for these materials to be tested with specific designs of copper alloys under specific printing parameters 6 .…”

“…For copper alloys, the current limited maturity in L-PBF technology compared to other alloys such as titanium is due to the better thermal conductivity of copper alloys and their higher reflectivity for lasers. This also means that copper alloys in their powder form do not melt easily.It is therefore necessary to increase the absorption rate of the laser by increasing the laser power or by recoating the copper alloy powder with a coating 6,7 .The method of increasing the laser power is to shorten the wavelength of the laser, based on the principle of Equation 1=…”

CuCrZr alloy manufactured by LPBF process: correlation between microstructure, mechanical and thermal properties

“…In this light, the CuZrCr alloy is one of the most investigated in the literature, as it displays improved processability with respect to pure Cu, while retaining acceptable thermal properties.. Fully-dense CuCrZr samples can be achieved, having as high relative density as 99.5%, with promising mechanical properties [11], and the effect of powder surface modi cation, aiming at improving laser absorption, have been explored, too [12]. The correlation between the microstructure, typically characterized by columnar grains oriented along the building direction, and thermal and electrical properties have been partially explored in the literature [4,[13][14][15], while the study of the impact of heat treatments on the microstructure and mechanical properties suggests that a balance between strength, ductility, and thermo-electrical performances can be found and tuned.…”