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首页> 外文会议>European Powder Metallurgy Association;Euro International powder metallurgy congress exhibition >Heat Resistant PM Aluminum Materials for Automotive Applications
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Heat Resistant PM Aluminum Materials for Automotive Applications

机译：汽车应用的耐热PM铝材料

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A series of high performance powder metallurgy (PM) aluminum materials have been developed. Thematerials are reinforced with large volumes of nano-sized quasicrystalline spherical particles evenlydispersed in the aluminum matrix. Typical size of the nanospheres is 20 to 300 nm. The core of thespheres appears to be crystal (cuboids) while the rest of the spheres are largely amorphous. The uniquemicrostructures lead to significant improvements in the microstructural thermal stability and mechanicalproperty of the materials. Ultimate tensile strength of the new alloy remains almost unchanged afterhaving been annealed at 400℃ for an extended period. The fatigue strength of the alloy is also increasedto a level comparable to sintered steels. The enhanced properties of the alloys could allow the materialsto be used for medium to high stress applications including those subjected to cyclic stresses at elevatedtemperatures, such as engine and transmission components.
机译：已经开发了一系列高性能粉末冶金（PM）铝材料。大量均匀分散在铝基体中的纳米级准晶球形颗粒增强了材料。纳米球的典型尺寸是20至300nm。球体的核心似乎是晶体（立方体），而其余球体基本上是无定形的。独特的微观结构极大地改善了材料的微观结构热稳定性和机械性能。新合金在400℃下长时间退火后，其极限抗拉强度几乎保持不变。合金的疲劳强度也提高到了与烧结钢相当的水平。合金增强的性能可以使材料用于中高应力应用，包括那些在高温下承受循环应力的应用，例如发动机和传动组件。

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