Microstructural stability is one of the utmost important requirements for metallic materialsin engineering applications, particularly at high temperatures. The paper shows how Mechanical Spectroscopy (MS) (i.e., damping and dynamic modulus measurements) permits the monitoring of the evolution of lattice defects, porosity, and cracks which strongly affect the mechanical behavior of metals and sometimes lead to permanent damage. For this purpose, some applications of the technique to different metals and alloys (AISI 304 stainless steel, PWA 1483 single crystal superalloy, nanostructured FeMo prepared via SPS sintering and tungsten) of engineering interest are presented. These experiments have been carried out in lab conditions using bar-shaped samples at constant or increasing temperatures. The results can be used to orient the interpretation of frequency and damping changes observed through other instruments in components of complex shape during their in-service life.

Costanza, G., Montanari, R., Richetta, M., Tata, M., Varone, A. (2016). Evaluation of structural stability of materials through mechanical spectroscopy: Four case studies. METALS, 6(12), 306 [10.3390/met6120306].

Evaluation of structural stability of materials through mechanical spectroscopy: Four case studies

COSTANZA, GIROLAMO;MONTANARI, ROBERTO;RICHETTA, MARIA;Tata, M;VARONE, ALESSANDRA
2016-01-01

Abstract

Microstructural stability is one of the utmost important requirements for metallic materialsin engineering applications, particularly at high temperatures. The paper shows how Mechanical Spectroscopy (MS) (i.e., damping and dynamic modulus measurements) permits the monitoring of the evolution of lattice defects, porosity, and cracks which strongly affect the mechanical behavior of metals and sometimes lead to permanent damage. For this purpose, some applications of the technique to different metals and alloys (AISI 304 stainless steel, PWA 1483 single crystal superalloy, nanostructured FeMo prepared via SPS sintering and tungsten) of engineering interest are presented. These experiments have been carried out in lab conditions using bar-shaped samples at constant or increasing temperatures. The results can be used to orient the interpretation of frequency and damping changes observed through other instruments in components of complex shape during their in-service life.
2016
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-IND/21 - METALLURGIA
Settore ING-IND/15 - DISEGNO E METODI DELL'INGEGNERIA INDUSTRIALE
English
AISI 304; Damping; Dynamic modulus; Mechanical spectroscopy; Microstructure stability; Nano-structured FeMo alloy; PWA 1483; Tungsten; Materials Science (all)
http://www.mdpi.com/2075-4701/6/12/306/pdf
Costanza, G., Montanari, R., Richetta, M., Tata, M., Varone, A. (2016). Evaluation of structural stability of materials through mechanical spectroscopy: Four case studies. METALS, 6(12), 306 [10.3390/met6120306].
Costanza, G; Montanari, R; Richetta, M; Tata, M; Varone, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/186442
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