Ultrasonic assisted grain refinement of Al-Mg alloy using in-situ MgAl2O4 particles

作者：Harini R Sri; Nampoothiri Jayakrishnan; Nagasivamuni B; Raj Baldev; Ravi K R^*

来源：Materials Letters, 2015, 145: 328-331.

DOI：10.1016/j.matlet.2015.01.132

• MgAl2O4 particles
• Grain refinement
• Ultrasonic treatment
• Solidification
• Nanocomposites
• Microstructure

MgAl2O4 particles were in-situ synthesised in Al-Mg melts using SiO2 precursor assisted by ultrasonic treatment (UT). 7 to 8 Fold reduction in grain size is achieved in Al-1Mg-0.1SiO(2) alloy subjected to 5 min UT. Reason behind the grain reduction is explained in terms of ultrasonic cavitation activated SiO2 reduction reaction, thereby increasing the number density of MgAl2O4 particles and their wettability.

• 出版日期2015-4-15