From Fifteen to Two Hundred NDT- methods in Fifty Years
Machine diagnostics is used for preventive maintenance, failure analysis, and for the after-care of damages.NDT-methods are utilized in all of these activities. Traditionally, NDT-methods were used for finding material discontinuities and sizing them. Naturally this is still the most important objective, but in addition to this traditional task an increasing amount of Non-Destructive Characterization methods are being introduced. These NDC-methods strive to measure the state of the material non-destructively in order to quantify parameters of the material that form the base for evaluating the safe use of the components in question.The paper sets out to give an idea of the incredibly fast proliferation of NDT- and NDC- methods that has taken place during the fifty last years. The interaction between the most important machine diagnostic methods used in loss prevention and these NDT- and NDC- methods is reviewed. The paper gives a short glimpse of the early history i.e.the discoveries leading to the first classical NDT-methods. Some facts are also given about the development in standardization and the certification of operators.The division of the two hundred various methods is hard to make, but the classical methods can be divided in a straight-forward way. The paper lists the abundance of the various methods available today for testing either in the field or in laboratory environment using the abbreviations for the methods in question without any attempt to explain their background or working principles. For some of the exotic methods the application area is given for clarity reasons.
NDT-and NDC-methods history method-list.
Thomas. AASTROEM
Pohjola Insurance Ltd Lapinm(a)entie 1, 00013 Pohjola, Helsinki, Finland
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
2665-2677
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）