Open AccessВлияние отжига и дополнительной деформации на механические свойства ультрамелкозернистого сплава Al-1.5Cu
Author(s) -
А.М. Мавлютов,
T. S. Orlova,
Э.Х. Яппарова
Publication year - 2020
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2020.18.49999.18407
Subject(s) - ultimate tensile strength , annealing (glass) , materials science , indentation hardness , alloy , torsion (gastropod) , severe plastic deformation , metallurgy , ductility (earth science) , high pressure , composite material , microstructure , creep , medicine , engineering , engineering physics , surgery
The mechanical properties of the ultrafine-grained (UFG) Al–1.5Cu (wt.%) alloy were investigated. The UFG structure was obtained using high pressure torsion (HPT) technique. UFG alloy demonstrates high values of microhardness (1690 MPa), yield strength (515 MPa) and ultimate tensile strength (655 MPa), but low ductility (~3%). Subsequent short-term annealing at 150 °C and additional HPT deformation to 0.25 rotations resulted in some decrease in ultimate tensile strength to 450 MPa, which was ~70% of the value before annealing but provided high ductility (~22%). The results suggests a high potential for practical application of the material. The proposed approach can be an universal effective way to achieve combination of high strength and high ductility for various UFG materials.