Isothermal sections at room temperature and 450°C for Al-rich (Al+0.15at%V)-Mg-Zn system have been determined by X-ray diffraction, microscopic observation and DTA methods. Comparing with Al-Mg-Zn system the α-p...Isothermal sections at room temperature and 450°C for Al-rich (Al+0.15at%V)-Mg-Zn system have been determined by X-ray diffraction, microscopic observation and DTA methods. Comparing with Al-Mg-Zn system the α-phase region in isothermal sections at room temperature and 450°C for the system with 0.15at%V is slightly narrowed and expanded respectively. The solubility limits of Zn and Mg in α-Al have been found to be 3.3at% (7.6wt%) and 5.5at%(5.0wt%) respectively at room temperature, and 6.0at% (13.4wt%) and 11.0at% (10.0wt%) at 450°C. The τ phase in this system is a ternary intermetallic compound, which undergoes an allotropic transformation at about 427°C.展开更多
文摘Isothermal sections at room temperature and 450°C for Al-rich (Al+0.15at%V)-Mg-Zn system have been determined by X-ray diffraction, microscopic observation and DTA methods. Comparing with Al-Mg-Zn system the α-phase region in isothermal sections at room temperature and 450°C for the system with 0.15at%V is slightly narrowed and expanded respectively. The solubility limits of Zn and Mg in α-Al have been found to be 3.3at% (7.6wt%) and 5.5at%(5.0wt%) respectively at room temperature, and 6.0at% (13.4wt%) and 11.0at% (10.0wt%) at 450°C. The τ phase in this system is a ternary intermetallic compound, which undergoes an allotropic transformation at about 427°C.
