Design of Experiments based optimization of Direct Energy Deposition Inconel 625 processing for a power generation turbine blade

Daniel F.O. Braga , Lucas Azevedo , G. Cipriano , Pedro M.G.P. Moreira
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Abstract

Laser Metal Deposition (LMD) ability to precisely fabricate complex geometries layer by layer, along with its capability to repair and enhance existing components, has ushered in new frontiers of design freedom and innovation. As industries continually seek solutions for increased efficiency and performance, LMD offers an avenue to unlock novel possibilities, enabling the production of high-quality, intricately designed parts while simultaneously reducing material waste, with significant build rate when compared to other metal AM processes. The unique properties of nickel-based superalloys, including exceptional high-temperature strength and corrosion resistance, make them indispensable materials for critical applications, particularly in aerospace, power generation, and the energy sector. This research paper presents a comprehensive investigation into the process optimization of laser melting deposition for Inconel 625, a high-performance nickel-chromium-based superalloy. The study employed a center cubic design as a Design of Experiments (DoE) framework, with a primary focus on achieving the maximum tensile strength as the optimization objective. A series of quasi-static tensile tests was conducted to evaluate the mechanical properties of the deposited material, while optical microscopy was utilized to analyze the cross-sectional characteristics, including deposition density and defect sizes.

基于实验设计的发电涡轮叶片直接能量沉积铬镍铁合金 625 加工优化方案
激光金属沉积 (LMD) 能够逐层精确制造复杂的几何形状,还能修复和增强现有部件,为设计自由度和创新开辟了新的领域。随着各行各业不断寻求提高效率和性能的解决方案,LMD 为开启新的可能性提供了一条途径,使生产高质量、设计复杂的零件成为可能,同时减少了材料浪费,与其他金属 AM 工艺相比,具有显著的制造率。镍基超合金具有独特的性能,包括出色的高温强度和耐腐蚀性,是关键应用领域不可或缺的材料,尤其是在航空航天、发电和能源领域。本研究论文介绍了对 Inconel 625(一种高性能镍铬基超级合金)激光熔融沉积工艺优化的全面调查。研究采用了中心立方设计作为实验设计(DoE)框架,以实现最大抗拉强度为主要优化目标。通过一系列准静态拉伸试验来评估沉积材料的机械性能,同时利用光学显微镜分析横截面特征,包括沉积密度和缺陷尺寸。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
1.70
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