Downloads
 
 

Bray, Don E. and Griffin, R.B., "Monitoring Hydrogen Release from 4140 Steel using the (LCR) Ultrasonic Technique", 2012 - posted 2/22/15

Bray, Don E. and Griffin, R.B., "Ultrasonic Characterization of Hydrogen Induced Stress in Pipelines," 2010 - posted 2/22/15

Acoustoelastic constants (Lij) for longitudinal and shear waves in engineering materials - posted 12/28/12

Bray, Don E. and Ainsworth, Paul J., "Acoustoelastic Coefficients for Commercially Produced 6XXX and 7XXX Series Aerospace Aluminum Plate," 2012 - posted 6/28/12

"Ultrasonic Characterization of Hydrogen Induced Stress in Pipelines"
IOPF 2010-6001, October 20-21, 2010, Houston, Texas, USA - posted 11/10/10

Equipment Inventory List - posted 5/11/10

HydrogenNWHASME2010.ppt
Ultrasonic Characterization of Hydrogen Induced Stress in 4140 Steel, as presented by Dr. Bray at the 30 March 2010 Meeting of the Northwestern Houston SubSection of the ASME. - posted 3/31/10

Ultrasonic Stress Measurement Using the LCR Wave (2.5 MB, pdf)
- posted 2/8/09

LCR Demonstrations 2007 (340 KB, pdf) - posted 2/8/09

US6424922.pdf
US Patent #6424922 Description - posted 11/15/08

US6477473.pdf
US Patent #6477473 Description - posted 11/15/08

US6523418.pdf
US Patent #6523418 Description - posted 11/15/08

Evaluation of Load Damage in Steel Using The LCR Ultrasonic Technique (2.8 MB, Powerpoint) - posted 11/17/07

Blade Evaluation video (609 Kb, Quicktime) - posted 7/9/07

"NDE's Role in a Flat Earth Society" - Keynote address, ICPIIT X Conference, Houston, Texas 20-23 June 2007 ASNT - posted 6/20/07

"Fracture Toughness Prediction in AISI 4137 Alloy Steel using Ultrasonic Frequency Analysis" (pdf version of Powerpoint presentation) - posted 2/19/07