Thema: Superlegierung, Grobkornstruktur, Ultraschallprüfung
Autor/Institution: Falsetti, R.V.
/General Electric Co., Schenectady, USa
Title: Ultrasonic inspection of acoustically Noisy materials
Titel : Ultraschallprüfung von akustisch stark rauschenden Werkstoffen
Quelle : Review of Progress in Quantitative Nondestructive Evaluation. Proceedings
of the Twenty-First Symposium, Snowmass Village, USA, 31.7.-5.8.1994
13 14B
1995
; New York: Plenum Press
; ISBN 0-306-45062-3
; S.2399-2404
; 6S,4B
; TIB-RO141(14,2);BAM-Z-1229/95
; A
; Ultrasonic inspection of large gas turbine rotor forgings made of IN706(
40Ni15Cr-Ti-Nb superalloy) is complicated by the materials anisotropic and
nonuniform acoustic properties. The inspection and signal processing
techniques described herein compensate for variations in the acoustic
properties that the authors have observed from forging to forging as well
as within any given forging. These techniques may be applied to a wide
variety of applications dealing with acoustically noisy materials with
nonuniform acoustic characteristics. The forgings receive an ultrasonic
inspection in three principle orthogonal directions: axial, radial and
tangential. The axial and radial inspections are accomplished by
longitudinal wave, pulse-echo, contact testing from all outside surfaces.
A tangential test is performed in regions of high operating stresses using
a shear wave, through-transmission, contact test from the axial surfaces
of the forging. This test is called the öpitch-catchö test. In addition,
longitudinal and shear wave, pulse-echo, immersion tests are performed, on
turbine wheel forgings only, from inside the bore. This paper presents a
description of the above tests with the exception of the immersion tests
from inside the bore. .1 F33,B13,H13,A25
Database Keywords: :Ultraschallprüfung, Grobkorngefüge, Anisotropie, :Gasturbine,
:Schmiedestück, :Superlegierung, Nickellegierung, Impulsechoverfahren,
Longitudinalwelle, Transversalwelle, V Durchschallung, Durchschallung
23 Turbinenläufer, Verfahrenstechnik
24 Z:A
26 IN706; 40Ni15Cr-Ti-Nb
27 Alloy2 Ni Cr Ti Nb
File Producer: FWD Förderverein Werkstoffdokumentation e.V. (DGZfP, BAM, FIZ Technik)
Brief Information about FWD: Virtual Library about FWD
| Frontpage |
| Abstracts List | |Virtual Library: Archives and Databases|
Rolf Diederichs 1. Dec 1996,
info@ndt.net