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Unformatted text preview: AAE 552 Spring 2009 A. F. Grandt 1 1 AAE 552: Nondestructive Evaluation of Structures and Materials A. F. Grandt, Jr. Professor of Aeronautics and Astronautics Purdue University W. Lafayette, IN 47907 Session 17 20 February 2009 2 Contact Information Alten F. (Skip) Grandt, Jr. Email: email@example.com Telephone: Office: 765-494-5141 Home: 765-463-4276 FAX: 765-494-0307 Course webpage accessed at: http://www.itap.purdue.edu/tlt/blackboard 3 AAE 552 Session 17 20 February 2009 Last Time: penetrant inspection Today: Finish penetrant Discuss Ch 10 problems Start radiography 4 Assignment Please read Textbook : Chapter 11 Webpage powerpoint references Radiographic Testing collaboration for NDT education Abstract #2 Due Session 18 (23 February 2009) see webpage description, examples of papers from prior years Paper #1 Due Session 21 (2 March 2009) Exam #1 Session 29 (Friday, 27 March 2009) 5 Ch 10: Penetrant Inspection Penetration of colored liquid locates surface breaking anomalies Glossary of Terms Capillary Action- the tendency of certain liquids to travel or climb when exposed to small openings. Contrast- the relative amount of light emitted or reflected between and indication and its background. Defect- a discontinuity that effects the usefulness of a part or specimen. Developer- a finely divided material applied over the surface of a part to help promote reverse capillary action and thus bring out a penetrant indication. AAE 552 Spring 2009 A. F. Grandt 2 Glossary of Terms Discontinuity- any interruption in the normal physical structure of a part or weld. It may or may not affect the usefulness of a part. Dwell Time - the period of time that a penetrant or developer must remain in contact with the surface of a part under test. Emulsification Time - the time allowed for the emulsifier to render the penetrant water washable and thus allow the part to be washed. Emulsifier- a material applied over a film of penetrant that renders it water washable. Glossary of Terms Evaluation- the process of deciding as to the severity of the condition after an indication has been interpreted. False Indication - an indication caused by improper processing; not caused by a relevant or non-relevant condition. Flash Time - the time required for the solvent to evaporate from the surface of a part when used to preclean or remove excess penetrant. Fluorescent Dye - a dye which becomes fluorescent (gives off light) when exposed to short wave radiation such as ultraviolet light. Glossary of Terms Indication- the visible evidence or penetrant bleed-out on the surface of the specimen Interpretation- the process of evaluating an indication in an attempt to determine the cause and nature of the discontinuity....
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This note was uploaded on 11/04/2010 for the course AAE 552 taught by Professor Longuski during the Spring '10 term at IUPUI.
- Spring '10