Accession Number:

ADA244429

Title:

Metal-Metal Bondline NDE Methods

Descriptive Note:

Final rept. 1 Oct 89-28 Feb 91,

Corporate Author:

PRATT AND WHITNEY WEST PALM BEACH FL

Personal Author(s):

Report Date:

1991-12-01

Pagination or Media Count:

17.0

Abstract:

Advanced gas turbine engine concepts are continually striving toward higher thrust to weight ratio possible. Two methods of achieving this goal are 1 higher compression ratios and 2 weight reduction through less material, lighter material or both. Development of integrally bladed rotors IBR is a relatively new manufacturing technique that would eliminate the need for heavier construction of the dovetail area on a rotor, while reducing gas leakage problems as well for that stage of compression. Integrally bladed rotors require reliable metal to metal bonding MMB techniques and the ability to adequately inspect the bond plane for defective conditions that would debit bond strength capabilities. The purpose of this program was the validation and refinement of an ultrasonic inspection method for examination of metal-to-metal bonds MMB representative of those encountered in bonded gas turbine components such as integrally-bladed rotors. The methodology was to be optimized for detection of typical defect conditions such as blown grains and microcracking. To assist in this method development, the metal-to-metal MTM simulation program, which was developed at Iowa State University, was to provide theoretical guidelines for method optimization.

Subject Categories:

  • Couplers, Fasteners and Joints
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE