Title:
NON-DESTRUCTIVE METHOD FOR THE DETECTION OF CREEP DAMAGE IN FERROMAGNETIC PARTS WITH A DEVICE CONSISTING OF AN EDDY CURRENT COIL AND A HALL SENSOR
Document Type and Number:
WIPO Patent Application WO2005074349
Kind Code:
A3
Abstract:
A non-destructive method for the detection of creep damage present in ferromagnetic power plant components. First a measurement device consisting an eddy current coil and a hall sensor with a magnetisation joke is manufactured. The measurement device is calibrated with tensile calibration specimens with defined creep strain by measuring the most significant NDT (non-destructive techniques) relevant measured properties. A multi-regressio: method is used for the correlation between NDT relevant measured properties and the defined creep strain. The calibrated meas-urement device is used for measurement of the creep strain present in said power plant components.
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Inventors:
GERMERDONK KLAUS (CH)
KERN ROLF (DE)
DENK JOSEF (DE)
LAWIN NILS (CH)
KOPP HARALD (DE)
KERN ROLF (DE)
DENK JOSEF (DE)
LAWIN NILS (CH)
KOPP HARALD (DE)
Application Number:
PCT/EP2005/050277
Publication Date:
August 03, 2006
Filing Date:
January 24, 2005
Export Citation:
Assignee:
ALSTOM TECHNOLOGY LTD (CH)
GERMERDONK KLAUS (CH)
KERN ROLF (DE)
DENK JOSEF (DE)
LAWIN NILS (CH)
KOPP HARALD (DE)
GERMERDONK KLAUS (CH)
KERN ROLF (DE)
DENK JOSEF (DE)
LAWIN NILS (CH)
KOPP HARALD (DE)
International Classes:
G01N27/82; G01N27/90
Foreign References:
| US4963826A | 1990-10-16 | |||
| US4425545A | 1984-01-10 | |||
| EP0969267A1 | 2000-01-05 | |||
| DE4235387C1 | 1994-03-24 |
Other References:
DOBMANN G ET AL: "Nondestructive characterization of materials (ultrasonic and micromagnetic techniques) for strength and toughness prediction and the detection of early creep damage", NUCLEAR ENGINEERING AND DESIGN NETHERLANDS, vol. 157, no. 1-2, 1 July 1995 (1995-07-01), pages 137 - 158, XP002299367, ISSN: 0029-5493
GOVINDARAJU M R ET AL: "Nondestructive evaluation of creep damage in power-plant steam generators and piping by magnetic measurements", NDT & E INTERNATIONAL, BUTTERWORTH-HEINEMANN, OXFORD,, GB, vol. 30, no. 1, February 1997 (1997-02-01), pages 11 - 17, XP004291880, ISSN: 0963-8695
SABLIK M J ET AL: "FINITE ELEMENT MODELING OF CREEP DAMAGE EFFECTS ON A MAGNETIC DETECTOR SIGNAL FOR A SEAM WELD/HAZ-REGION IN A STEEL PIPE", IEEE TRANSACTIONS ON MAGNETICS, IEEE INC. NEW YORK, US, vol. 34, no. 4, PART 1, July 1998 (1998-07-01), pages 2156 - 2158, XP000833303, ISSN: 0018-9464
GOVINDARAJU M R ET AL: "Nondestructive evaluation of creep damage in power-plant steam generators and piping by magnetic measurements", NDT & E INTERNATIONAL, BUTTERWORTH-HEINEMANN, OXFORD,, GB, vol. 30, no. 1, February 1997 (1997-02-01), pages 11 - 17, XP004291880, ISSN: 0963-8695
SABLIK M J ET AL: "FINITE ELEMENT MODELING OF CREEP DAMAGE EFFECTS ON A MAGNETIC DETECTOR SIGNAL FOR A SEAM WELD/HAZ-REGION IN A STEEL PIPE", IEEE TRANSACTIONS ON MAGNETICS, IEEE INC. NEW YORK, US, vol. 34, no. 4, PART 1, July 1998 (1998-07-01), pages 2156 - 2158, XP000833303, ISSN: 0018-9464
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