رسول هدایت نژاد - Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran
حامد ثابت - Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran
صادق رحمتی - Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
علی سالمی گلعذانی - Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran

This research examines the microstructure and microhardness in the additive manufacturing process using the laser metal deposition method with the deposition of Inconel ۷۱۸ powder on the Inconel ۷۳۸ 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 ۷۱۸ 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 ۱۰۰ 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.

Additive Manufacturing, Laser Metal Deposition, Microstructure, ساخت افزودنی, رسوب فلز با لیزر, ریزساختار