Power dissipation efficiency and temperature sensitivity coefficient of 2024Al/Al₁₈B₄O₃₃w composite deformed at strain rate up to 10.0 s⁻¹

Abstract

Power dissipation efficiency and temperature sensitivity coefficient of 2024Al/Al 18 B 4 O 33 w composite deformed at strain rate up to 10.0 s À 1 Effizienz der Energieverteilung und des Temperatursensitivitätskoeffizienten von AlCu4Mg1 (EN AW-2024)/Al 18 B 4 O 33 w-Komposit verformt durch Belastungsraten bis zu 10,0 s À 1Power dissipation efficiency and temperature sensitivity coefficient of 2024Al/ Al 18 B 4 O 33 w composite under high strain rate (> 0.01 s À 1 ) at elevated temperature is studied. The composite has two instability zones with the one under low temperature and high strain rate. The power dissipation efficiency of composite from 0.08 to 0.30 is lower than that of unreinforced 2024Al alloy, showing the poorer hot forgeability of composite.Keywords: Temperature sensitivity coefficient / metal matrix composite / power dissipation efficiency / dynamic recrystallization / elevated temperature Schlüsselwörter: Temperatursensitivitätskoeffizient / Metallmatrix-Verbundwerkstoffe / Energieverteilungseffizienz / dynamische Rekristallisation / erhöhte Temperatur . Micrograph of composite after compressed at a 350°C, 1.0 s À 1 , b 450°C, 1.0 s À 1 , c 500°C, 1.0 s À 1 , d 450°C, 10.0 s À 1 .Power dissipation efficiency and temperature sensitivity coefficient of 2024Al Materialwiss.