Microstructure evolution of Cu _ 22 % In alloy subjected to the high pressure torsion

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Korneva, A.^1 ; Straumal, B.^2,3 ; Kogtenkova, O.^2 ; Ivanisenko, Y.^4 ; Wierzbicka-Miernik, A.^1 ; Kilmametov, A.^4 ; Ziba, P.^2

Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta St. 25, 30-059 Cracow, Poland^1

Institute of Solid State Physics, Russian Academy of Sciences, Ac. Ossipyan str. 2, 142432 Chernogolovka, Russia^2

Laboratory of Hybrid Nanomaterials, National University of Science and Technology MISIS, Leninskii prosp. 4, 119049 Moscow, Russia^3

Karlsruher Institut für Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstei-Leopoldshafen, Germany^4

关键词: Duplex microstructures;    High pressure torsions;    Lamellar precipitates;    Micro-structure evolutions;    Morphology and size;    Scanning and transmission electron microscopy;    Severe plastic deformations;    Specific properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012093/pdf
DOI  :  10.1088/1757-899X/63/1/012093

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Microstructure studies of Cu-22 wt. % In alloy after annealing and severe plastic deformation were carried out by means of scanning and transmission electron microscopy. Two samples of the alloy were annealed at 350 °C and 520 °C for 553 hours and then subjected to high pressure torsion at room temperature under a pressure of 5 GPa in a Bridgman anvil-type unit. The sample annealed at 350 °C exhibited duplex microstructure: copper matrix with embedded plates of 8 phase (Cu7In3) and 8 phase with lamellar precipitates of copper. The microstructure of the sample annealed at 520 °C consisted of copper matrix with spherical precipitates of 8 phase. The subsequent severe plastic deformation resulted in a substantial grain refinement in copper matrix to nanoscale size. However, the morphology and size of 8 phase precipitates did not change. The measurements of microhardness and calorimetric studies were also performed in order to study the specific properties of 8 phase.