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Abstract：
The last two decades have witnessed significant progress in the development of severe plastic deformation techniques to produce ultrafine-grained materials with new and superior properties. This review examines works and achievements related to the low-temperature superplasticity of ultrafine-grained aluminum alloys. The examples are provided of the possibility to observe low-temperature superplasticity in aluminum alloys at temperatures less than 0.5 Tmelt and even at room temperature, and herein, we demonstrate the cases of achieving high ductility and high strength in aluminum alloys from processing utilizing severe plastic deformation. Special emphasis is placed on recent studies of the formation of segregations of alloying elements at grain boundaries in UFG Al alloys and their influence on the development of grain boundary sliding and manifestation of low-temperature superplasticity. In addition, the current status and innovative potential of low-temperature superplasticity in aluminum alloys are observed.
摘要：
在过去的二十年中，在严重塑性变形技术的发展方面取得了重大进展，以生产具有新的和优越的性能的超细晶粒材料。这篇综述研究了与超细晶铝合金的低温超塑性有关的工作和成就。这些示例提供了在低于0.5Tmelt的温度下甚至在室温下观察铝合金中的低温超塑性的可能性，在这里，我们证明了实现高延展性和高强度的铝合金加工利用严重的塑性变形的情况。特别强调了最近对UFGAl合金晶界处合金元素偏析的形成及其对晶界滑动发展和低温超塑性表现的影响的研究。此外,观察了铝合金低温超塑性的现状和创新潜力。
