Influence of Nanostructuration on the Sound Velocity in Aluminum Al_99.50

Euroinvent ICIR 2018

Cazac, A.M.^1 ; Alexandru, A.^1 ; Baciu, C.^1 ; Sandu, A.V.^1 ; Bejinariu, C.^1

Gheorghe Asachi Technical University from Iasi-Romania, Faculty of Materials Science and Engineering, Blvd. Dimitrie Mangeron, No. 41, Iasi-Romania

700050, Romania^1

关键词: Closed-die forging process;    Deformation cycle;    Material science;    Metal and alloys;    Microstructure analysis;    Nano structuration;    Processing technique;    Severe plastic deformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/374/1/012038/pdf
DOI  :  10.1088/1757-899X/374/1/012038

来源: IOP

【 摘 要 】

The paper proposes is a multidisciplinary study on the influence of nanostructured material obtained by cyclic closed die forging process, in this case the aluminum with a purity of 99.50% (Al-99.50), on the sound velocity. The study of nanomaterials is a branch of material science on the basis of which nanotechnology can be approached. Severe plastic deformation (SPD) is a generic term describing a group of metal and alloy processing techniques involving very high stresses without including significant changes in the overall dimensions of the model or workpiece. The sample is of a regular quadrangular prism shape with the side square of a = 10 mm and the height of h = 16 mm, so with a dimensional factor h / a = 1.6. For each sample, a number of 7 determinations were performed to establish a mean value for the sound velocity. As a result of the microstructure analysis, it is observed that at the deformation cycle 4 the grains have an average size between 250 and 500 nm.