High strength and utilizable ductility of bulk ultrafine-grained Cu-Al alloys
High strength and utilizable ductility of bulk ultrafine-grained Cu-Al alloys
复制标题
大块超细晶铜铝合金的高强度和可用延展性
DOI：
10.1063/1.2936306
复制
发表时间：
2008-05-19
影响因子：
4
通讯作者：
Zhang, Z. F.
中科院分区：
文献类型：
--
作者：
An, X. H.;Han, W. Z.;Zhang, Z. F.
塑性不足是几乎所有超细晶(UFG)材料的主要缺点，这限制了其实际应用。采用等通道转角挤压技术制备了块体超细晶铜铝合金。通过合金化设计显微组织，在保持高强度的同时，提高了延性，使其超过了结构使用标准。导致UFG铜铝合金强度和塑性同时提高的原因是形变孪晶的形成及其广泛的交叉点促进了位错的积累。(C)2008年美国物理研究所。
Lack of plasticity is the main drawback for nearly all ultrafine-grained (UFG) materials, which restricts their practical applications. Bulk UFG Cu-Al alloys have been fabricated by using equal channel angular pressing technique. Its ductility was improved to exceed the criteria for structural utility while maintaining a high strength by designing the microstructure via alloying. Factors resulting in the simultaneously enhanced strength and ductility of UFG Cu-Al alloys are the formation of deformation twins and their extensive intersections facilitating accumulation of dislocations. (C) 2008 American Institute of Physics.