Ultrasound, eddy current and magnetic Barkhausen noise as tools for sigma phase detection on a UNS S31803 duplex stainless steel
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
18/10/2012
18/10/2012
2010
|
| Resumo |
Sigma phase is a deleterious one which can be formed in duplex stainless steels during heat treatment or welding. Aiming to accompany this transformation, ferrite and sigma percentage and hardness were measured on samples of a UNS S31803 duplex stainless steel submitted to heat treatment. These results were compared to measurements obtained from ultrasound and eddy current techniques, i.e., velocity and impedance, respectively. Additionally, backscattered signals produced by wave propagation were acquired during ultrasonic inspection as well as magnetic Barkhausen noise during magnetic inspection. Both signal types were processed via a combination of detrended-fluctuation analysis (DFA) and principal component analysis (PCA). The techniques used were proven to be sensitive to changes in samples related to sigma phase formation due to heat treatment. Furthermore, there is an advantage using these methods since they are nondestructive. (C) 2010 Elsevier B.V. All rights reserved. FUNCAP CNPq CAPES UFC |
| Identificador |
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.527, n.12, p.2886-2891, 2010 0921-5093 http://producao.usp.br/handle/BDPI/18239 10.1016/j.msea.2010.01.017 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE SA |
| Relação |
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing |
| Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE SA |
| Palavras-Chave | #Duplex steel #Heat treatment #Phase transformation #Nondestructive testing #Nanoscience & Nanotechnology #Materials Science, Multidisciplinary |
| Tipo |
article original article publishedVersion |
