1.1 本规范提供了两个无损检测级别，以及验收标准和适用的无损检测方法。它不是基于零件驱动的工程标准，而是基于正确应用无损检测方法的实际检测能力。 2 缺陷检测基于缺陷的特征和相对于所应用的无损检测方法的方向。 1.2 适用性- 本标准适用于使用激光束粉末床熔合（PBF-LB）加工的零件。通过热等静压（HIP）对PBF-LB零件进行后处理可以（部分或完全）闭合某些类型的缺陷。应用于髋关节零件的无损检测技术可能无法检测到塌陷缺陷。本标准的使用者有责任确定该条件是否可拒绝以及使用何种无损检测技术。 1.3 本实践中的某些领域可能需要认知工程组织和增材制造供应商之间的协议，或认知工程组织的具体指导我们。 1.4 单位- 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。 1.5 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.6 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》中确立的国际公认的标准化原则制定的。======意义和用途====== 5.1 本规范提供了作为生产检验一部分的零件可接受性验证的检验级别、检验方法和验收标准要求。 5.2 这些要求提供了检查员评估无损检测结果的标准。 5.3 该实践的实施需要单个零件无损检测技术开发、认知工程并发以及单个零件工作指导或技术的适用无损检测3级批准。

1.1 This practice provides two NDT inspection levels, with acceptance criteria and applicable NDT method(s). It is not based on part driven engineering criteria but the practical inspection capability of properly applied NDT methods. 2 Flaw detection is based on the flaw’s characteristic and relative orientation to the applied NDT method. 1.2 Applicability— This standard applies to parts that are processed using laser beam powder bed fusion (PBF-LB). Post processing of PBF-LB parts by hot isostatic pressing (HIP) can close (partially or completely) certain types of defects. NDT techniques applied to HIP’ed parts may not detect collapsed defects. It is the responsibility of the user of this standard to determine if this condition is rejectable and what NDT technique to use. 1.3 There are areas in this practice that may require agreement between the cognizant engineering organization and the additive manufacturing supplier, or specific direction from the cognizant engineering organization. 1.4 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.5 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. 1.6 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 The practice provides inspection levels, inspection methods and acceptance criteria requirements for the verification of part acceptability as part of production inspection. 5.2 These requirements provide the inspector’s criteria for evaluation of NDT results. 5.3 Implementation of this practice requires individual part NDT technique development, cognizant engineering concurrence, and applicable NDT Level 3 approval of the individual part work instruction or technique.