| 1 | Effect of temperature and strain rate on compressive response of extruded magnesium nano-composite显示文摘The hot deformation behaviour of extruded magnesium-zinc oxide nano composite has been studied using hot compression test.The test was conducted in the temperature range of 250-400℃ and in the strain rate range of 0.01 to 1.5 s^(−1).The processing map was obtained using the power dissipation efficiency with the functions of temperature and strain rate.The workability and instability domains were observed in the processing map for a nano composite.The optical microscopy(OM),scanning electron microscopy(SEM)and transmission electron microscopy(TEM)images were used to confirm the formation of dynamic recrystallization(DRX),dynamic recovery(DRY)and instability regions.The workability region of the composite was identified at a working temperature of 400℃ and the strain rate of 0.01 s^(−1) from the processing map.The instability regions were observed at higher strain rates(>0.1 s^(−1))and temperatures(250-400℃). | B.Selvam P.Marimuthu R.Narayanasamy V.Senthilkumar K.S.Tun M.Gupta | 2015 | Journal of Magnesium and Alloys2015，3，3： | 0 |
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