Abstract
In this paper, the ignition behaviors of AZ80 magnesium alloy plates were studied by experimental observation and numerical analysis. From the experimental tests, it is shown that the ignition process of this alloy can fit very well with model Ⅲ proposed by A. L. Breiter. There exists the obvious difference in the starting ignition time for the AZ80 alloy plates with different size. The larger the size of the alloy plates, the longer the ignition time. Simulation results confirm an excellent agreement with the ignition temperature rise curve measured in this study. Based on the simulation results, the effects of the size of alloy plates, melting phase change, and the strain of oxidation layers on the internal energy of the system, the ignition time and ignition point of the alloys are also investigated in details. This study provides the deep understanding on the start-up process of ignition behaviors for the magnesium alloys.
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