Volume 8, Issue 2 (Journal OF Welding Science and Technology 2023)
JWSTI 2023, 8(2): 155-168 |
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Hedayatnejad R, Sabet H, Rahmati S, Salemi Golezani A. Investigating laser power in additive manufacturing (AM-LMD) process on the microstructure and hardness of deposited layers on Inconel738. JWSTI 2023; 8 (2) :155-168
URL: http://jwsti.iut.ac.ir/article-1-418-en.html
URL: http://jwsti.iut.ac.ir/article-1-418-en.html
1- Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran
2- Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran ,h-sabet@kiau.ac.ir
3- Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
2- Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran ,
3- Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Abstract: (2223 Views)
This research examines the microstructure and microhardness in the additive manufacturing process using the laser metal deposition method with the deposition of Inconel 718 powder on the Inconel 738 substrate. For this purpose, deposition with different laser power was performed on different substrates, and the microstructure and hardness of the layers were studied. Three layers of Inconel 718 powder were deposited on the substrates. The results show that the laser power parameter in the deposition process significantly affects the microstructure of the samples. By increasing the laser power by 100 W, the distance between the phases γ' in the substrate and γ'' in the layers decreased significantly. With increasing laser power, an increase in the geometric dimensions and volume percentage of the γ'' phase was also observed. In addition, increasing the laser power decreased the volume percentage of the Laves phase. By measuring the microhardness of the deposition layers, it was found that the hardness of the third layer decreases with increasing laser power.
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