1.1 本指南涵盖了铁素体钢A型夏比V型缺口试样（试验方法）的重组程序 E23 )和夏比尺寸的断裂韧性试样，适用于按照试验方法进行三点弯曲试验 E1921 或 E1820 . 铁素体钢（主要是核电站辐照计划中使用的断裂试样）是通过将类似材料的端片焊接到未受初始试验影响的重新加工试样截面上而重组的。给出了选择合适的半试样和端部凸耳材料、尺寸控制和避免切口区域过热的指南。 重构方法的全面概述见Ref ( 1. ) . 2. 1.2 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.3 本标准并非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制定适当的安全、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====== 3.1 实践 E185 定义了轻水反应堆监督计划夏比V型缺口试样和规程的最低要求 E2215 描述了监测胶囊中试样的评估。为了更好地定义现有数据，或者在没有标准断裂韧性试样可用的情况下确定材料的断裂韧性，可能需要为工厂老化管理问题（如工厂许可证更新）增加额外样本，以扩展原始监测计划。重建现有样本的断裂部分的可能性可以提供可测试的样本。 3.2 夏比尺寸的试样通常由之前未进行机械试验的材料加工而成。在某些情况下( 1. )没有可用的全尺寸试样坯料或( 2. )具有所需历史的可用材料（如已接受辐照）不足以加工全尺寸试样，或两者兼而有之。 3.3 该问题的解决方案（在本指南中讨论）是使用之前测试的夏比尺寸试样的断半或其他铁素体钢件制造新试样，这些钢件太小，无法制造完整的夏比- 尺寸样本。在本指南中，每个新试样的中心段利用先前测试试样的断半部分和焊接到中心段的端部凸舌，或者中心段可能只是一块比夏比尺寸试样短的未测试材料。本指南在专门解决辐照压力容器钢的重构问题的同时，还可以为材料可用性有限的其他情况下夏比尺寸试样的重构提供指导。

1.1 This guide covers procedures for the reconstitution of ferritic steel, Type A Charpy V-notch specimens (Test Methods E23 ) and Charpy-sized fracture toughness specimens suitable for testing in three point bending in accordance with Test Methods E1921 or E1820 . Ferritic steels (principally broken specimens used in nuclear power plant irradiation programs) are reconstituted by welding end tabs of similar material onto remachined specimen sections that were unaffected by the initial test. Guidelines are given for the selection of suitable specimen halves and end tab materials, for dimensional control, and for avoidance of overheating the notch area. A comprehensive overview of the reconstitution methodologies can be found in Ref ( 1 ) . 2 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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 ====== 3.1 Practice E185 defines the minimum requirements for light-water reactor surveillance program Charpy V-notch specimens and Practice E2215 describes the evaluation of test specimens from surveillance capsules. It may be desirable to extend the original surveillance program with additional specimens for plant aging management issues, such as plant license renewal, to better define existing data, or to determine fracture toughness of a material when no standard fracture toughness test specimens are available. The possibility to reconstitute the broken halves of existing specimens can provide specimens which can be tested. 3.2 Charpy-sized specimens are typically machined from material not previously mechanically tested. There are occasions that exist when either ( 1 ) no full size specimen blanks are available or ( 2 ) the material available with the desired history (such as having been subjected to irradiation) is not sufficient for the machining of full-size specimens, or both. 3.3 A solution to this problem, which is addressed in this guide, is to fabricate new specimens using the broken halves of previously tested Charpy-sized specimens or other pieces of ferritic steel too small to fabricate a full Charpy-sized specimen. In this guide, the central segment of each new specimen utilizes a broken half of a previously tested specimen and end tabs that are welded to the central segment, or the central section may simply be a piece of untested material shorter than a Charpy-sized specimen. While specifically addressing reconstitution of irradiated pressure vessel steels, this guide can also provide guidance for reconstitution of Charpy-sized specimens for other situations where material availability is limited.