Dynamic mechanical analyze of superelastic CuMnAl shape memory alloy

7th International Conference on Advanced Concepts in Mechanical Engineering

Ursanu, A.I.^1 ; Stanciu, S.^1 ; Pricop, B.^1 ; Sndulache, F.^1 ; Cimpoeu, N.^1

Materials Science and Engineering Faculty, Gheorghe Asachi Technical University of Iasi, Iasi, Romania^1

关键词: Aging heat treatment;    Base material;    Dynamic mechanical;    Metallic material;    Reduction coefficient;    Superelastic;    Superelasticity;    Transformation temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012032/pdf
DOI  :  10.1088/1757-899X/147/1/012032

来源: IOP

【 摘 要 】

A new shape memory alloy was obtain from high purity Cu, Mn and Al elements using a induce furnace. The intelligent material present negative transformation temperatures and an austenite like state at room temperature. The austenite state of CuMnAl shape memory alloy present superelasticity property. Five kilograms ingot was obtain of Cu10Mn10Al alloy. From the base material (melted state) were cut samples with 6 mm thickness using a mechanical saw. After an homogenization heat treatment the samples were hot rolled through four passes with a reduction coefficient of 20%. Experimental lamellas were obtained with 1.5 mm thickness and 90x10 mm length and width. After the hot rolled treatment the materials were heat treated at 800°C for 20 minutes and chilled in water. Four samples, one just laminated and three heat treated by aging, were analyzed with a Netzsch DMA equipment to establish the elastic modulus and the internal friction values of the materials. Metallic materials microstructure was analyzed using a scanning electron microscope Vega Tescan LMH II type. After the aging heat treatment a decrease of internal friction is observed on the entire analyze range which is assigned to formation of Al-based precipitates that block the internal movement of the alloy characteristic phases.