Paper, Presentations, and Books

Conference Paper:
ASNT Fall Conference 11/2013, At Las Vegas, Nevada, USA; 2013

Heavy rotor forgings, in particular for the power generation market, are highly stressed components and the ultrasonic inspection is the most important method to guarantee a sufficient material qualit...

Conference Paper:
DGZfP Jahrestagung 05/2013, At Dresden, Germany; 2013
DOI: 10.13140/2.1.4391.5843

Large forgings for turbine and generator rotors are characterized by very low ultrasonic attenuation. Due to “phantom indications,” only low pulse repetition frequencies are often possible. Consequent...

Article:
Materials Testing 04/2013; 55(4):254–260
DOI: 10.3139/120.110432
Publisher: Walter de Gruyter GmbH

The assessment of the Probability of Detection (POD) is used to evaluate the reliability of the non-destructive testing (NDT) system. The POD is required in industries, where a missed flaw might cause...

Conference Paper:
DACH Tagung 09/2012, At Graz, Austria; 2012
DOI: 10.13140/RG.2.1.3449.9288

This paper compares the performance of 2D-SAFT and 3D-SAFT (Synthetic Aperture Focusing Technique) and quantifies it using the example of inspecting large forgings. It is shown that a full 3D-SAFT ana...

Conference Paper:
DGZfP Jahrestagung 06/2011, At Bremen, Germany; 2011
DOI: 10.13140/RG.2.1.3187.7849

Heavy forged rotor components, such as those used in land-based turbines and generators for power generation, are inspected using ultrasonic testing, among other methods, prior to commissioning. These...

Article:
AIP Conference Proceedings 02/2010; 1211:451-457
DOI: 10.1063/1.3362428
Publisher: AIP

Using Active Thermography defects such as cracks can be detected fast and reliably. Choosing from a wide range of excitation techniques the method can be adapted to a number of tasks in non‐destructiv...

Article:
AIP Conference Proceedings 02/2010; 1211:1631-1638
DOI: 10.1063/1.3362264
Publisher: AIP

All types of heavy forgings that are used in energy machine industry, rotor shafts as well as discs, retaining rings or tie bolts are subject to extensive nondestructive inspections before they are de...

Article:
AIP Conference Proceedings 02/2010; 1211:1623-1630
DOI: 10.1063/1.3362263
Publisher: AIP

Heavy rotor forgings for land-based power generation turbines and generators are inspected ultrasonically. Several decades ago the first inspections were conducted using manual, straight beam, contact...

Book:
09/2009
DOI: 10.13140/RG.2.1.1680.4567
Publisher: Shaker, ISBN: 978-3832284978

Active thermography with electromagnetic excitation allows one to detect defects in components non-destructively, reliably and fast by imaging with an infrared camera. In induction thermography a curr...

Conference Paper:
DGZfP Jahrestagung 05/2009, At Münster, Germany; 2009
DOI: 10.13140/2.1.3357.5365

In power engineering, components subjected to high stress are used in various applications, and it is essential to prevent defects in these components. In addition to turbine construction, this is als...

Article:
AIP Conference Proceedings 03/2009; 1096:518
DOI: 10.1063/1.3114299
Publisher: AIP

Active thermography, using electromagnetic excitation, allows detecting defects like cracks which distort the flow of current in the component under examination. Like other thermography techniques it ...

Article:
AIP Conference Proceedings 02/2008; 975:475-482
DOI: 10.1063/1.2902698
Publisher: AIP

Induction thermography is a non-contacting, non-destructive evaluation method with a wide range of applications. A deeper understanding of the detectability of cracks requires fundamental knowledge ab...