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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Effect of oxide layer formation on deformation of aluminum alloys under fire conditions
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Effect of oxide layer formation on deformation of aluminum alloys under fire conditions

机译：着火条件下氧化层的形成对铝合金变形的影响

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摘要

The purpose of this paper is to investigate the structural behavior of aluminum alloys used in the aerospace industry when exposed to conditions similar to those of an accident scenario, such as a fuel fire. This study focuses on the role that the aluminum oxide layer plays in the deformation and the strength of the alloy above melting temperature. To replicate some of the thermal and atmospheric conditions that the alloys might experience in an accident scenario, aluminum rod specimens were subjected to temperatures near to or above their melting temperature in air, nitrogen, and vacuum environments. The characteristics of their deformation, such as geometry and rate of deformation, were observed. Tests were conducted by suspending aluminum rods vertically from an enclosure. This type of experiment was performed in two different environments: air and nitrogen. The change in environments allowed the effects of the oxide layer on the material strength to be analyzed by inhibiting the growth of the oxide layer. Observations were reported from imaging taken during the experiment showing creep behavior of aluminum alloys at elevated temperatures and time to failure. In addition, an example of tensile load-displacement data obtained in air and vacuum was reported to understand the effect of oxide layer on aluminum deformation and strength.
机译：本文的目的是研究航空航天业铝合金在暴露于类似于事故场景的条件下（例如燃料起火）的结构行为。这项研究集中于氧化铝层在高于熔化温度的情况下在合金的变形和强度中发挥的作用。为了复制合金在事故场景中可能遇到的一些热和大气条件，铝棒试样在空气，氮气和真空环境中要经受接近或高于其熔化温度的温度。观察了它们的变形特征，例如几何形状和变形速率。通过从外壳垂直悬挂铝棒进行测试。这类实验是在两种不同的环境中进行的：空气和氮气。环境的变化允许通过抑制氧化物层的生长来分析氧化物层对材料强度的影响。从实验过程中获得的成像报告中观察到的数据表明铝合金在高温和失效时间下的蠕变行为。另外，报告了在空气和真空中获得的拉伸载荷-位移数据的示例，以了解氧化层对铝变形和强度的影响。

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