1.1 本指南解释了如何使用光学摄影的自动静态或动态图像分析来表征与粉末形状相关的添加制造（AM）金属粉末原料的质量。本指南将描述测量粉末形状参数的方法，这些参数可以识别潜在的有害粉末特性，并具体描述如何识别和量化粉末批次中团聚体/卫星和其他形状不规则的非球形粉末颗粒的比例。 1.2 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ===意义和用途====== 5.1 颗粒表征，特别是颗粒尺寸分布，已成为各种行业和市场中质量控制（QC）和研发（R&D）的重要参数，无论颗粒系统是过程中的最终产品还是中间成分。 但单独的尺寸并不是用于理解颗粒系统完整颗粒形态的许多因素及其对其他性能的影响的足够的形态测量。预计该信息将有助于了解形状对粉末铺展性和流动性的影响，在粉末床熔合AM中形成床，以及最终AM零件的密度和孔隙率（定义见 ISO/ASTM 52900 和术语 B243 ). 最终，可以为这些形状参数的质量控制（QC）公差制定规范，这些参数可以通过直接、快速的自动化分析进行测量

1.1 This guide explains how to characterize the quality of metal powder feedstock to additive manufacturing (AM) relative to the powder shape using automated static or dynamic image analysis by optical photography. This guide will describe the method(s) to measure powder shape parameters that can identify potentially detrimental powder characteristics and specifically describe how to identify and quantify the proportion of agglomerates/satellites and other irregularly shaped non-spherical powder particles in a powder batch. 1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Particle characterization, especially particle size distribution, has been an important parameter for quality control (QC) and research and development (R&D) in a very wide variety of industries and markets, anywhere a particulate system is a final product or an intermediate constituent somewhere in the process. But size alone is not a sufficient morphological measurement to use to understand many factors of the complete particle morphology of particulate systems and their effects on other properties. This information is expected to contribute to the understanding of the effects of shape on powder spreadability and flowability in the creation of the bed in powder bed fusion AM and the density and porosity of the final AM parts (definitions in ISO/ASTM 52900 and Terminology B243 ). Ultimately, specifications can be developed for quality control (QC) tolerances for these shape parameters that can be measured with a straightforward, fast automated analysis