Emisja akustyczna w materiałach ceramicznych i kompozytach metalicznych poddanych próbie ściskania - badania wstępne

• Autorzy: Pawełek A. , Piątkowski A. , Jasieński Z. , Litwora A. , Kudela S. , Ranachowski P.

Warianty tytułu

EN

Acoustic emission in ceramic materials and metallic composites exposed to compression test-initial research

• Konferencja: XLVIII Otwarte Seminarium z Akustyki, Wrocław-Polanica Zdrój, 11-14 września 2001 r.
• Języki publikacji: PL

Abstrakty

EN

There are presented, at the first time, the results of the preliminary investigations of the correlations between the behaviour of acoustic emission (AE) and both the channel-die and the standard compression deformation processes occurring in ceramic and composite materials at ambient temperature. The obtained results are preliminarily discussed in the context of possible deformation mechanisms as well as in the context of structural observations by using the optical microscopy. In the case of the ceramics (cordierite - mullite) the large range of high rate of the AE events has been observed at the final stage of the compression test. The most probably it is due to the so-called pseudoplasticity effect related with the increase of porosity and the development of cracking processes with the increasing internal stresses. In the case of the composites - Mg-4Li-5Al and Mg-4Li-3Al alloys reinforced by delta. Al2O3 fibres - it has been observed different AE behaviour. The high AE activity is observed rather at the onset of deformation process and its range is more longer in time for the material of greater contents of A However, the general character of the peaks of the rate of AE is similar, and the most probably it is related mainly with the mechanisms of the cracking of the .delta. Al2O3 fibres.

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Telekomunikacji i Akustyki Politechniki Wrocławskiej. Konferencje
• Rocznik: 2001
• Tom: Vol. 83, nr 27
• Strony: 423--427
• Opis fizyczny: bibliogr.22 poz.

Twórcy

autor

Pawełek A.

autor

Piątkowski A.

autor

Jasieński Z.

autor

Litwora A.

autor

Kudela S.

autor

Ranachowski P.

• Instytut Metalurgii i Inżynierii Materiałowej, A. Krupkowskiego PAN, ul. Reymonta 25, Kraków