Journal
MATERIALS CHARACTERIZATION
Volume 135, Issue -, Pages 104-114Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2017.11.023
Keywords
Ultrafine-grained materials; Al-Mg-Si alloys; Hydrostatic extrusion; Electrical conductivity
Categories
Funding
- National Centre for Research and Development within the ERA.NET-RUS [NCBR/ERA NET RUS/02/2012]
Ask authors/readers for more resources
The effect of hydrostatic extrusion combined with an artificial aging on microstructure, mechanical and electrical properties of 6101 Al-Mg-Si alloy was investigated. It has been shown that such thermo-mechanical treatment is an effective method for producing of long wires with an ultrafine-grained microstructure (grain size of 300-400 nm) and enhanced ultimate tensile strength ( > 330 MPa) and electrical conductivity (up to 58% IACS). The mechanical behavior of 6101 Al-Mg-Si alloy depended strongly on applied strains by hydrostatic extrusion and crystallographic texture. Higher accumulative strain accelerated the precipitation kinetics but decreased the age hardening response. The double fiber < 100 > and < 111 > texture was observed for hydrostatically extruded samples. The < 001 > grains with homogenously distributed needle-like beta '' precipitates provided precipitation strengthening of material while < 111 > grains resulted in more efficient grain boundary strengthening. Quantitative microstructure characterization allowed adjusting physical model to estimate the electrical conductivity and compare it with experimental data. The high conductivity was provided mainly by decomposition of solid solution due to precipitation of needle-like beta '' precipitates in the grain interior and spherical beta' or beta particles located at grain boundaries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available