ABSTRACT Failure analysis is a key concern in the development of composites. It not only helps to understand the material performance under severe loading conditions but also to decide the suitability of the material in particular applications. In this context, this paper highlights the behaviour of AZ91E with 2 wt-% nickel-coated alumina reinforced composites under different loading conditions. Composites were fabricated by semi-solid stir casting route while impact, and fatigue tests are conducted according to standard procedures. The properties of the prepared composite are discussed and compared with the monolithic alloy AZ91E. Ni coated alumina reinforced AZ91E magnesium-based composites yielded improved impact and fatigue strength because of good bonding between the matrix and reinforcement achieved through a metallic coating on the ceramic reinforcement. Further fractographical analysis is presented to understand the mechanism of failure.

中文翻译：

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AZ91E-Ni包覆氧化铝复合材料的冲击与疲劳失效研究

摘要 失效分析是复合材料开发中的一个关键问题。它不仅有助于了解材料在严重负载条件下的性能，而且有助于确定材料在特定应用中的适用性。在此背景下，本文重点介绍了 AZ91E 与 2 wt% 镀镍氧化铝增强复合材料在不同负载条件下的性能。复合材料采用半固态搅拌铸造工艺，同时冲击，并根据标准程序进行疲劳试验。讨论了制备的复合材料的性能，并与整体合金 AZ91E 进行了比较。由于通过陶瓷增强材料上的金属涂层实现了基体和增强材料之间的良好结合，镍涂层氧化铝增强 AZ91E 镁基复合材料提高了冲击强度和疲劳强度。提出了进一步的断口分析以了解失效机制。