Abstract Additively manufactured (AM) components usually have nonequilibrium microstructures. Post-built heat treatments are recommended for AM components to achieve homogenous microstructures. In this study, the effects were investigated of conventional solutionizing and precipitation hardening (H-900) heat treatments on the microstructure evolution of 17-4PH AM and wrought components. Microstructural characterization techniques including SEM, TEM and EBSD analysis were used on 17-4PH AM and wrought components to obtain quantitative information about the microstructure and phase evolution during these heat treatments. These microstructural studies demonstrate that 17-4PH AM components can achieve microstructures and hardnesses similar to those of wrought samples by post-built heat treatments.

中文翻译：

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热处理对增材制造和锻造 17-4PH 不锈钢显微组织演变的影响

摘要 增材制造 (AM) 部件通常具有非平衡微观结构。建议对增材制造部件进行后期热处理，以实现均匀的微观结构。在这项研究中，研究了常规固溶和沉淀硬化 (H-900) 热处理对 17-4PH AM 和锻造部件的微观结构演变的影响。包括 SEM、TEM 和 EBSD 分析在内的微观结构表征技术用于 17-4PH AM 和锻造部件，以获得有关这些热处理过程中微观结构和相演变的定量信息。这些显微结构研究表明，17-4PH AM 部件可以通过后置热处理获得与锻造样品相似的微观结构和硬度。