Naslov
Microstructural and thermal analysis of Cu-AI-Mn-Ag shape memory alloys
(Microstructural and thermal analysis of Cu-AI-Mn- Ag shape memory alloys)

Autori
Manasijević, Dragan ; Holjevac Grgurić, Tamara ; Balanović, Ljubiša ; Stamenković, Uroš ; Gorgievski, Milan ; Gojić, Mirko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
MME SEE 2019 Book of Abstracts Metallurgical & Materials Engineering Congress of South-East Europe / Glišić, Dragomir ; Marković, Branislav ; Manojlović, Vaso - Beograd : Faiulty oTechnolos/ and Metallurgy, University of Bel$ade, 2019, 55-55

Skup
Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019)

Mjesto i datum
Beograd, Srbija, 05.06.2019. - 07.06.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Shape memory alloy, Cu-Al-Mn-Ag alloy, Microstructure, Martensitic transformation

Sažetak
Two quaternary Cu-Al-Mn-Ag shape memory alloys with nearly constant Al and Ag contents and variable content of Mn were prepared by arc melting of pure metals. Experimentally determined overal! compositions of the investigated alloys were Cu-9.4%Al-1 .1%Mn- 3.7%Ag (alloy 1) and Cu-9.5%Al-5.6%Mn-3.9%Ag (alloy 2) (in wt.%). Microstructures of the prepared samples were investigated in the asprepared condition and after heat treatment which included solution annealing at 850 "C followed by quenching into the water at room temperature. The effects of alloy composition and heat treatments on the microstructure and transformation temperatures of the investigated shape memory alloys were investigated by using scanning electron microscopy coupled with energy dispersive spectroscopy (SEMEDS) and differential scanning calorimetry (DSC). It was determined that alloy with low Mn content (alloy 1) exhibits o+F two-phase microstructure in the as-prepared state and martensite+d two-phase microstructure in the as-quenched state. Ag was uniformly distributed between the coexisting phases. The microstructure of the alloy with a higher content of Mn (alloy 2) was fully martensitic in both investigated conditions. Phase transition temperatures, including martensite/auslenite transition, order/disorder transformation of austenite phase, dissolution of o precipitates and melting of the alloy were determined by using the DSC method.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Metalurgija

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