Issue << content << Validation of Barkhausen Noise Inspection Through Chrome Plating Using Temper Etch Inspection


DOI:

2012. . No. 2(56) - Jun 2012, pp. 27-31

Validation of Barkhausen Noise Inspection Through Chrome Plating Using Temper Etch Inspection

J. Whitmer, J. Hansen

The following paper will present data from extensive automated Barkhausen Noise Testing on 39 individual aircraft landing gear parts of the same design and compare this data to Temper Etch inspection results.
The part being investigated is a chrome plated slender tube made of 300M steel which has proven to be susceptible to grinding burns.  The basics of the grinding, plating, and inspection procedures will be given along with evaluation of the data to include discussion on differentiating between grinding burns and residual stresses.

References
  1. MIL-STD-867B Change 1. Temper Etch inspection. 01 March 2007 2. MIL-STD-866C. Grinding of Chrome Plated Steel and Steel Parts. 28 June 1978.
  2. Thomas J., Fix R. M. Optimizing Magnetization Parameters of Magnetic Barkhausen Noise for More Accurate Detection of Residual Stresses and Variations in Microstructure. Presented at ICBM-7, July 2009.
  3. SAE. Aerospace Recommended Practice 4462. Barkhausen Noise Inspection for Detecting Grinding Burns in High Strength Steel Parts. Jan. 1991.
  4. Boeing Process Specification BAC 5653. Barkhausen Inspection for Thermal Damage in Steels. Nov. 1997.
 
published
NDT in Mining Industry

MAIN FEATURE:
NDT in Mining Industry

CONTACTS

5 Udelny Pr.
St. Petersburg
007 812 670 7609
007 812 670 7611


NDT World, Russian Quarterty Journal
©2000-2016 All rights reserved