1.1 这些数字参考图像显示了铝熔焊中各种类型和严重程度的不连续性，这些不连续性可以通过数字射线照相检查发现。这些数字参考图像没有指定这些不连续性的可接受水平，而是为传达可接受水平提供了视觉参考。 1.2 这些数字参考图像基于锻铝产品中的两个标称焊缝厚度，适用于 表1 焊缝是使用6061和5083合金的基材板以及5356和4043气体金属电弧（GMA）电极制成的。这些数字参考图像用于评估锻铝产品焊缝的数字射线照片。 不建议将其用于铸造材料的补焊；然而，它们适用于组装或制造焊接。铝和镁铸件的数字参考图像可在数字参考图像中获得 E2422 和 E2973 . 1.3 附件包含代表性分级和未分级不连续性的插图。 表2 列出了每种基材厚度的不连续性类型和严重程度。每种分级的不连续性类型都有五个严重程度级别，从1到5，按严重程度递增的顺序排列。未分级的不连续性仅供参考。 1.4 单位-- 以英寸为单位的值- 磅单位应被视为标准单位。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.5 本标准的所有领域均可由认可的工程组织和供应商达成协议，或由认可的工程师组织提供具体指示。这些项目应在采购订单或合同中加以说明。 1.6 这些数字参考图像并不旨在说明在进行胶片射线照相时铝熔焊中发现的不连续性的类型和程度。如果对此类焊件进行胶片射线照相，请参阅参考射线照相 E1648 . 1.7 只有软件和图像的许可副本才能用于生产检查。ASTM/用户许可协议的副本应存档以供审计。（参见 附注1 .) 注1: 该组数字参考图像由八个数字数据文件、加载所需格式的软件和加载过程的具体说明组成。八个参考图像页面显示了分级不连续和未分级不连续。可从ASTM国际总部获得，订单号:RRE3420。 1.8 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。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，并确定监管限制的适用性。 1.9 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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====== 4.1 根据本标准使用数字参考图像的人员应具备根据国家或国际公认的无损检测人员资格实践或标准进行射线照相解释的资格，并经雇主或认证机构认证（如适用）。所使用的惯例或标准及其适用的修订应在使用方之间的合同协议中确定。 如果需要协助解释适用于参考射线照片的规范和产品要求，在做出接受/拒绝决定之前，应咨询经过认证的III级人员（如果III级人员是射线照片口译员，则可能是同一个人）。 4.2 使用这些数字参考图像需要使用方就每种不连续类型的可接受水平达成一致。为0.125英寸（3.2毫米）厚和0.50英寸（12.7毫米）厚材料的焊缝提供了插图。这些图示旨在代表厚度高达0.75英寸（19毫米）的基材。这些数字参考图像的使用并不局限于所示的特定能级或绝对厚度限制。 在没有其他适用文件的情况下，这些数字参考图像可用于买方和制造商之间已达成协议的其他能级或厚度，或两者兼而有之。应按照合同规范使用标准数字参考图像。

1.1 These digital reference images illustrate various types and severity levels of discontinuities in aluminum fusion welds that may be revealed by digital radiographic examination. These digital reference images do not specify the acceptable level of these discontinuities, rather they provide a visual reference for communicating the acceptable level. 1.2 These digital reference images are based on two nominal weld thicknesses in wrought aluminum products and are applicable to the thickness ranges shown in Table 1 . The welds were produced using base material plates of 6061 and 5083 alloys and 5356 and 4043 gas metal-arc (GMA) electrodes. These digital reference images are intended for use in evaluating digital radiographs of welds in wrought aluminum products. They are not recommended for use with repair welds in cast materials; however, they are appropriate for use with assembly or fabrication welds. Digital reference images for aluminum and magnesium castings are available in Digital Reference Images E2422 and E2973 . 1.3 The adjunct contains illustrations of representative graded and ungraded discontinuities. Table 2 lists the discontinuity types and severities illustrated for each thickness of base material. Each of the graded discontinuity types has five severity levels, 1 through 5, in order of increasing severity. The ungraded discontinuities are included for informational purposes. 1.4 Units— The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 All areas of this standard may be open to agreement between the cognizant engineering organization and the supplier, or specific direction from the cognizant engineering organization. These items should be addressed in the purchase order or the contract. 1.6 These digital reference images are not intended to illustrate the types and degrees of discontinuities found in aluminum fusion welds when performing film radiography. If performing film radiography of such weldments, refer to Reference Radiographs E1648 . 1.7 Only licensed copies of the software and images shall be utilized for production inspection. A copy of the ASTM/User license agreement shall be kept on file for audit purposes. (See Note 1 .) Note 1: The set of digital reference images consists of eight digital data files, and software to load the desired format and specific instructions on the loading process. The eight reference image pages illustrate both graded discontinuities and ungraded discontinuities. Available from ASTM International Headquarters, Order No: RRE3420. 1.8 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. 1.9 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 ====== 4.1 Personnel utilizing digital reference images to this standard shall be qualified to perform radiographic interpretation in accordance with a nationally or internationally recognized NDT personnel qualification practice or standard and certified by the employer or certifying agency, as applicable. The practice or standard used and its applicable revision shall be identified in the contractual agreement between the using parties. If assistance is needed with interpreting specifications and product requirements as applied to the reference radiographs, a certified Level III shall be consulted before accept/reject decisions are made (if the Level III is the radiographic interpreter, this may be the same person). 4.2 Use of these digital reference images requires agreement between the using parties as to the acceptable level of each discontinuity type. Illustrations are provided for welds in 0.125 in. (3.2 mm) thick material and 0.50 in. (12.7 mm) thick material. These illustrations are intended to be representative of base material thicknesses up to 0.75 in. (19 mm). Use of these digital reference images is not intended to be restricted to the specific energy level or the absolute thickness limits that are illustrated. These digital reference images may be used, where there is no other applicable document, for other energy levels or thicknesses, or both, for which agreement has been reached between the purchaser and the manufacturer. Standard digital reference images should be used in accordance with contractual specifications.