Microstructure and properties of rapidly solidified powder metallurgy Al–Fe–Mo–Si alloys

An investigation on the microstructure and mechanical properties of spray-deposited Al–8.5Fe–1.1V–1.9Si alloy

“…Dispersion strengthened Al alloys based on the Al-Fe-V-Si quarternary system have been developed using rapid solidification techniques [5,6]. These alloys have received great attention because they possess much better high temperature strengths as compared to conventional aluminum alloys, and also exhibit the potential to replace titanium alloys used in aerospace in the temperature range from 150 to 350 • C [7].…”

Damping properties on age hardening of Al–7Si–0.3Mg alloy during T6 treatment

“…the dislocation damping and interfacial damping mechanism [4][5][6][7][8][9][10]. Since the interfacial damping is intimately concerned to the absorbing ability of interface E-mail address: choongdo.lee@gmdat.com.…”

“…and grain boundary to thermal gradient or mechanical strain formed in internal structure, it has been frequently proposed as dominant mechanism on MMC [4,5] and RS-PM [6,7] that have a remarkable microstructure characteristics of interface and grain boundary with comparison to conventional microstructure. Otherwise, the dislocation damping behavior that is based on Granato-Lücke theory has been regarded as a dominant damping mechanism of fine grain-sized and conventional aluminum alloys [8][9][10]. And, it is very well known that the damping behavior is fundamentally close related to dislocation movement and interaction between dislocation and pinning point, and that the damping capacity depends sensitively upon the dislocation density and spacing between weak or strong pinning points [8][9][10][11][12][13].…”

“…Otherwise, the dislocation damping behavior that is based on Granato-Lücke theory has been regarded as a dominant damping mechanism of fine grain-sized and conventional aluminum alloys [8][9][10]. And, it is very well known that the damping behavior is fundamentally close related to dislocation movement and interaction between dislocation and pinning point, and that the damping capacity depends sensitively upon the dislocation density and spacing between weak or strong pinning points [8][9][10][11][12][13]. This means that there is intimate relationship between mechanical property and damping capacity on the viewpoint of microstructure change and/or transformation.…”

“…This means that there is intimate relationship between mechanical property and damping capacity on the viewpoint of microstructure change and/or transformation. In recent, Li et al have reported in their experimental research that the damping capacity of RS-PM Al-based alloy is enhanced through microstructure change by precipitation of hard dispersoids [10] to dislocation damping behavior, this simultaneous enhancement of mechanical property and damping capacity will be remarkably achieved even in conventional alloy system. In present study, it aimed at investigates the variation of damping capacity on mechanical property of Al-7Si-0.3Mg alloy during T6 treatment which it has been recognized as an effective tool for improvement of mechanical properties and microstructure transformation [14,15].…”