Nondestructive Characterization and Evaluation of Embrittlement Kinetics and Elastic Constants of Duplex Stainless Steel SAF 2205 for Different Aging Times at 425A degrees C and 475A degrees C

• Type: Article in International Scientific Journal
• Date: 2011

Authors

de Araujo Freitas, VLD (Author) Other; Normando, PG (Author) Other; de Albuquerque, VHC (Author) Other; Silva, ED (Author) Other; Silva, AA (Author) Other; João Manuel R. S. Tavares (Author) FEUP

Journal

Title: Journal of Nondestructive Evaluation

Vol. 30 No. 3

Pages: 130-136

ISSN: 0195-9298

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 16 Citations

Scopus - 21 Citations

Other information

Authenticus ID: P-002-NGX

DOI: 10.1007/s10921-011-0100-1

Abstract (EN): In this work, an experimental study was carried out to evaluate the potential of the ultrasonic technique, with ultrasonic velocity and attenuation measurements, to assess the heat aging effects on duplex stainless steel SAF 2205, at temperatures of 425A degrees C and 475A degrees C for time periods of 12 h, 24 h, 50 h, 100 h and 200 h, as well as in the as received state of the material. Velocity measurements were calculated for both longitudinal and transversal waves. The elastic constants, Young's modulus and shear modulus, of the material were computed from the relationship between longitudinal and transversal velocities. For the ultrasonic attenuation, only longitudinal waves were considered. Despite the large scatter measurements, both ultrasonic velocity and attenuation increased with the heat aging time, particularly at 475A degrees C. Thus, it may be concluded that the technique used is promising and provides relevant contributions to an accurate characterization of materials and evaluation of their mechanical properties in a non-destructive manner.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7