Chapter 2 Defect Analysis本章提要本章提要:缺陷分析是无损检测的技术基础。缺陷分析是无损检测的技术基础。主要解决两方面的问题:主要解决两方面的问题:一是弄清一是弄清defects classification、property and harmfulness;二是分析二是分析the causes of defects,以便有效地,以便有效地Identify defects and eliminate defects,提高工艺质量。,提高工艺质量。本章重点讲授本章重点讲授defects classification and harmfulness。缺陷的产生原因应结合缺陷的产生原因应结合材料成型原理材料成型原理课程内容深课程内容深入理解与总结。入理解与总结。最后,对最后,对Commonly used detection methods作作简要介绍简要介绍。2.1 Concept and classification of process defects2.1.1 Concept of process defects(1)What are the process d