Microstructural and Cavitation Erosion Behavior of the CuAlNi Shape Memory Alloy

Microstructural and Cavitation Erosion Behavior of the CuAlNi Shape Memory Alloy

Microstructural and cavitation erosion testing was carried out on Cu-12.8Al-4.1Ni (wt. %) shape memory alloy (SMA) samples produced by continuous casting followed by heat treatment consisting of solution annealing at 885 °C for 60 min and, later, water quenching. Cavitation resistance testing was ap...

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Bibliographic Details
Published in:Metals (Basel ) Vol. 11; no. 7; p. 997
Main Authors: Volkov-Husović, Tatjana, Ivanić, Ivana, Kožuh, Stjepan, Stevanović, Sanja, Vlahović, Milica, Martinović, Sanja, Stopic, Srecko, Gojić, Mirko
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-07-2021
Subjects:
Alloys
Annealing
Atomic force microscopes
Atomic force microscopy
Cavitation
Cavitation erosion
Cavitation resistance
Continuous cast shapes
Continuous casting
Cooling
Corrosion resistance
electron microscopy
Grain size
Heat treating
Heat treatment
Hot pressing
Martensite
Martensitic transformations
Metal fatigue
Microhardness
Microscopy
Microstructure
Optical microscopes
optical microscopy
Powder metallurgy
Shape memory alloys
Silicon nitride
Solution annealing
Temperature
Vibratory cavitation
Water quenching
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Summary:Microstructural and cavitation erosion testing was carried out on Cu-12.8Al-4.1Ni (wt. %) shape memory alloy (SMA) samples produced by continuous casting followed by heat treatment consisting of solution annealing at 885 °C for 60 min and, later, water quenching. Cavitation resistance testing was applied using a standard ultrasonic vibratory cavitation set up with stationary specimen. Surface changes during the cavitation were monitored by metallographic analysis using an optical microscope (OM), atomic force microscope (AFM), and scanning electron microscope (SEM) as well as by weight measurements. The results revealed a martensite microstructure after both casting and quenching. Microhardness value was higher after water quenching than in the as-cast state. After 420 min of cavitation exposure, a negligible mass loss was noticed for both samples. Based on the obtained results, both samples showed excellent cavitation resistance. Mass loss and morphological analysis of the formed pits indicated better cavitation resistance for the as-cast state (L).
ISSN:2075-4701
2075-4701
DOI:10.3390/met11070997