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Effect of temperature on wear mechanisms of an aluminium - Based abradable coating for aircraft engines after a dynamic interaction with a Ti6al4v blade
Wear ( IF 5 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.wear.2020.203202
Baptiste Martinet , Andrea Cappella , Sylvain Philippon , Claudio Montebello

Abstract Small blade-casing clearances in aircraft engines reduce fuel consumption but increase the risks of contact interactions due to working conditions. These interactions cannot be avoided but their effects can be reduced by using abradable linings thermally sprayed inside the casings. To investigate these interactions and the mechanisms of wear deriving from them, a specific ballistic bench has been developed in order to perform representative tests of the low-pressure compressor environment (up to 270 °C) and enabling only one interaction between an aluminum-based abradable sample and a Ti6Al4V tool. Contact forces and incursion depth were measured for a nominal depth of cut of 100 μm and at a mean velocity of 125 m/s. It has been shown that the temperature affects mainly the abradable behaviour under these high-speed interactions. In addition, the wear that is resulting at high temperature is driven by a process that can be very different from the low temperature case.

中文翻译:

温度对航空发动机铝基耐磨涂层与 Ti6al4v 叶片动态相互作用后磨损机制的影响

摘要 飞机发动机中较小的叶片外壳间隙会降低燃料消耗,但会增加因工作条件而导致的接触相互作用的风险。这些相互作用无法避免,但可以通过使用热喷涂在外壳内的耐磨衬里来减少它们的影响。为了研究这些相互作用以及由此产生的磨损机制,开发了一种特定的弹道台,以便对低压压缩机环境(高达 270 °C)进行代表性测试,并仅实现铝基材料之间的一种相互作用。耐磨样品和 Ti6Al4V 工具。在 100 μm 的标称切削深度和 125 m/s 的平均速度下测量接触力和侵入深度。已经表明,温度主要影响这些高速相互作用下的磨损行为。
更新日期:2020-04-01
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