ACPD detection and evaluation of 475 °C embrittlement of aged 2507 super duplex stainless steels

An investigation to evaluate embrittlement of thermally aged 2507 super duplex stainless steel (SDSS) by means of an accurate measurement of the electric conductivity using an alternating current potential drop (ACPD) probe is conducted. Samples were aged for different periods up to 300 h at 475 °C....

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Bibliographic Details
Main Authors: Gutiérrez-Vargas, Gildardo, López, Víctor H., Carreón, Héctor, Kim, Jin-Yeon, Ruiz, Alberto
Format: Conference Proceeding
Language:English
Subjects:
Duplex stainless steels
Electrical resistivity
Embrittlement
Microhardness
Voltage drop
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Summary:An investigation to evaluate embrittlement of thermally aged 2507 super duplex stainless steel (SDSS) by means of an accurate measurement of the electric conductivity using an alternating current potential drop (ACPD) probe is conducted. Samples were aged for different periods up to 300 h at 475 °C. Results obtained from the ACPD measurements show appreciable increases in electric conductivity of samples with prolonged exposure to this temperature. In addition, the hardness of the samples increases significantly for long holding times, resulting in an embrittlement of the SDSS. These results are also supported by other data from sample-based laboratory techniques, i.e. microhardness and microscopy results which provide more direct evidences of the sensitization. This paper, therefore, demonstrates the feasibility of using the ACPD probe in field applications.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4974696