Accession Number : ADA550862


Title :   Nondestructive Evaluation (NDE) Exploratory Development for Air Force Systems. Delivery Order 0001: Quick Reaction NDE and Characterization--Effects of Chemical Effects of Chemical Etching after Pre-Inspection Mechanical Cleaning on Fluorescent Penetrant Indications of Fatigue Cracks


Descriptive Note : Final rept. 30 Jun 2009-31 Aug 2010


Corporate Author : UNIVERSAL TECHNOLOGY CORP DAYTON OH


Personal Author(s) : Tracy, Noel A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a550862.pdf


Report Date : Aug 2011


Pagination or Media Count : 78


Abstract : A study was conducted to gather data on the ability of etching to recover FPI crack indications degraded by mechanically cleaning cracked specimens made of Ti-6Al-4V and Inconel 718. The data showed that minimal etching does not sufficiently overcome the deleterious effects of certain mechanical cleaning methods to provide for a subsequent reliable fluorescent-penetrant inspection, and the amount of etching required to recover some crack indications would not be allowed on critical rotating engine parts.


Descriptors :   *ETCHING , *NONDESTRUCTIVE TESTING , *TITANIUM ALLOYS , CLEANING , CRACKS , INSPECTION , NICKEL ALLOY INCONEL , SUPERALLOYS


Subject Categories : Metallurgy and Metallography
      Printing and Graphic Arts


Distribution Statement : APPROVED FOR PUBLIC RELEASE