Nondestructive characterization of 2Cr-1Mo steel quality using magnetoacoustic emission

Author

Augustyniak, B. ; Piotrowski, L. ; Chmielewski, M. ; Sablik, M.J.

Author_Institution

Dept. of Phys., Tech. Univ. Gdansk, Poland

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

3207

Lastpage

3209

Abstract

This paper describes experiments with 2Cr-1Mo-grade steel at various stages of creep damage. Properties of magnetoacoustic emission (MAE) were tested and compared to other magnetic properties such as hysteresis loop B(H), Barkhausen effect (HBN), and magnetostriction λ. The creep-damage stage was evaluated from microstructural analysis and mechanical properties tests. It was revealed that incipient creep damage leads to decrease of MAE and magnetostriction as well to slight decrease of coercivity Hc and to nonmonotonic behavior of HBN intensity. These features are discussed qualitatively using models of magnetic hysteresis and of MAE.

Keywords

Barkhausen effect; acoustic emission testing; alloy steel; coercive force; creep; ferromagnetic materials; magnetic hysteresis; magnetoacoustic effects; magnetostriction; Barkhausen effect; Cr-Mo steel; Fe-C-Cr-Mo; coercivity; creep damage; magnetic hysteresis; magnetic properties; magnetoacoustic emission; magnetostriction; mechanical properties; microstructural analysis; nondestructive evaluation; Creep; Degradation; Magnetic analysis; Magnetic hysteresis; Magnetic properties; Magnetostriction; Mechanical factors; Microstructure; Steel; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802416

Filename

1042499