本文件描述了使用电子背散射衍射（EBSD）技术评估金属材料塑性和/或蠕变变形引起的疲劳和蠕变等机械损伤的取向分析指南。本国际标准定义了错误定向参数，并规定了此类机械损伤评估的测量条件。本文件建议用于评估奥氏体不锈钢的机械损伤，奥氏体不锈钢广泛用于发电厂和其他设施的各种部件。 在本文件中，机械损伤是指由于外部过载、疲劳和蠕变导致结构材料断裂的损伤；除了化学和热损伤。

This document describes the guidelines for misorientation analysis to assess mechanical damage such as fatigue and creep induced by plastic and/or creep deformation for metallic materials by using electron backscatter diffraction (EBSD) technique. This international standard defines misorientation parameters and specifies measurement conditions for such mechanical damage assessment. This document is recommended to evaluate mechanical damage of austenitic stainless steel, which is widely used for various components of power plants and other facilities. In this document, the mechanical damage refers to the damage which causes the fracture of structural materials due to external overload, fatigue and creep; excepting the chemical and thermal damages themselves.