This work provides results and analysis of the in situ thermal measurement acquired during the 3D builds performed for the 2018 additive manufacturing benchmark tests. The objective is to provide context for post-process characterization of distortion, residual strain, and microstructure, which are reported elsewhere in this Journal, and to provide validation data for thermal models of the build process. Four bridge artifacts (75 mm long, 5 mm wide, 12.5 mm tall) are created in each of three builds using a commercial laser powder bed fusion system. The builds are performed using nickel super alloy 625 (IN625). High-speed infrared thermography performed during four of the builds is used to measure the melt-pool length and cooling rate within a select region. The temperature of the substrate and build volume is measured during the fifth build to provide data to establish the boundary conditions for thermal models.

中文翻译：

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金属AM-Bench文物的3D构建期间熔池长度和冷却速率的原位测量

这项工作提供了3D构建期间为2018年增材制造基准测试执行的现场热测量的结果和分析。目的是为变形，残余应变和微结构的后处理表征提供背景，这些在本期刊的其他地方已有报道，并为构建过程的热模型提供验证数据。使用商用激光粉末床融合系统，在三个模型的每一个中都创建了四个桥假像（长75毫米，宽5毫米，高12.5毫米）。使用镍超级合金625（IN625）进行构建。在四个构建过程中执行的高速红外热成像技术用于测量选定区域内的熔池长度和冷却速率。