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):

Report Date:

2011-08-01

Pagination or Media Count:

78.0

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.

Subject Categories:

  • Metallurgy and Metallography
  • Printing and Graphic Arts

Distribution Statement:

APPROVED FOR PUBLIC RELEASE