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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Wire arc additive manufacturing (WAAM) involves wire deposition using arc heat sources. The WAAM process is suitable for manufacturing large parts in the aviation and space sectors owing to its fast deposition speed compared with the direct energy deposition (DED) process. Therefore, several studies have been conducted on this topic. However, in the metal additive manufacturing process, different solidification rates at the bottom and top of the stack create different microstructures, resulting in a decrease in the mechanical properties. In this study, additive manufacturing of Inconel 625 metal, a superalloy, was performed using a WAAM process based on gas metal arc welding (GMAW). The interlayer temperature was treated as a variable in this process. The mechanical properties, including the tensile strength and hardness, were compared under a constant interlayer cooling time. This comparison was performed by establishing interlayer cooling conditions in which the maximum temperature of the welded metal remained constant. The mechanical properties were analyzed by varying interlayer temperatures from 150 °C to 900 °C, allowing an examination of changes in these properties with different cooling conditions. In addition, we measured the cooling time required based on various interlayer temperature conditions. Through this analysis, we aimed to identify the conditions that result in excellent mechanical properties and efficient additive manufacturing.
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ABSTRACT
1. 서론
2. 실험 방법
3. 실험결과 및 고찰
4. 결론
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