@ARTICLE{Lee_Seong-Hee_Microstructure_2019, author={Lee, Seong-Hee}, volume={vol. 64}, number={No 3}, journal={Archives of Metallurgy and Materials}, pages={875-878}, howpublished={online}, year={2019}, publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences}, publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences}, abstract={Microstructures and mechanical properties of as-cast Al-6.5Mg-1.5Zn-0.5Fe alloys newly alloy-designed for the parts of automobile were investigated in detail. The aluminum (Al) sheets of 4 mm thickness, 30 mm width and 100 mm length were reduced to a thickness of 1mm by multi-pass rolling at ambient temperature and subsequently annealed for 1h at 200~500°C. The as-cast Al sheet was deformed without a formation of so large cracks even at huge rolling reduction of 75%. The recrystallization begun to occur at 250°C, it finished at 350°C. The as-rolled material showed tensile strength of 430 MPa and tensile elongation of 4.7%, however the specimen after annealing at 500°C showed the strength of 305 MPa and the elongation of 32%. The fraction of high angle grain boundaries above 15 degree increased greatly after annealing at high temperatures. These characteristics of the specimens after annealing were discussed in detail.}, type={Artykuły / Articles}, title={Microstructure and Mechanical Properties of as Cast Al-6.5Mg-1.5Zn-0.5Fe Alloy Followed by Cold Rolling and Subsequent Annealing}, URL={http://czasopisma.pan.pl/Content/112992/PDF/AMM-2019-3-11-Lee.pdf}, doi={10.24425/amm.2019.129464}, keywords={aluminum alloy, cold rolling, annealing, microstructure, mechanical properties}, }