Non-destructive measurements of large case depths in hardening steels using the thermal-wave radar

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Non-destructive measurements of large case depths in hardening steels using the thermal-wave radar

Velazquez-Hernandez, A. / Melnikov, A. / Mandelis, A. / Sivagurunathan, K. / Rodrigez-Garcia, M.E. / Gercia, J.

The thermal-wave radar method was used to resolve and measure deep hardness case depths (2-3 mm) of AISI9310 and Pyrowear53 steels used in gears manufactured for the aerospace industry. Monotonic increases of the cross-correlation peak delay time with case depth increases were demonstrated for all samples (several gears) at five locations on the gear: Flank 1, flank 2, flat face, top, and root. These case depths are the deepest ones measured photothermally to-date, to our best knowledge. The advantages of this method compared to single-frequency PTR and similar broad spectrum photothermal methods are the enhanced SNR of the TWR, which represents the major factor for the improved depth resolution. Additionally, the TWR method leads to significant measurement reduction time.

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Dokumentinformationen

Titel :

Non-destructive measurements of large case depths in hardening steels using the thermal-wave radar

Weitere Titelangaben:

Zerstörungsfreie Messung großer Aufkohlungstiefe in gehärtetem Stahl mittels Wärmewellenradar

Beteiligte:

Velazquez-Hernandez, A. (Autor:in) / Melnikov, A. (Autor:in) / Mandelis, A. (Autor:in) / Sivagurunathan, K. (Autor:in) / Rodrigez-Garcia, M.E. (Autor:in) / Gercia, J. (Autor:in)

Erschienen in:

NDT&E International ; 44 , 1 ; 16-21

Erscheinungsdatum :

2012

Format / Umfang :

6 Seiten, 7 Bilder, 1 Tabelle, 19 Quellen

ISSN :

0963-8695

DOI :

https://doi.org/10.1016/j.ndteint.2011.08.006

Medientyp :

Aufsatz (Zeitschrift)