Improvement of the mechanical properties of 7xxx-aluminum alloys due to the systematical design of the microstructure

通过微观结构的系统设计提高 7xxx 铝合金的机械性能

• 批准号: 225648152
• 负责人: Professor Dr. Walter Reimers
• 金额: --
• 依托单位: Fachgebiet Metallische Werkstoffe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/225648152?language=en
• 关键词: Improvement; mechanical; properties; 7xxx; aluminum

The investigations of the first funding period show that it is possible to enhance the strength properties and the ductility of the 7xxx alloys simultaneously. This enhancements are possible due to a combination of selected extrusion processes and targeted artificial aging. Within this proposal further investigations will be carried out concerning the cold deformation and the fracture behavior, to get detailed information about the failure mechanisms of the 7xxx-alloys (7020, 7021.50 and 7175). Furthermore hollow profiles will be extruded which show different structural morphologies due to geometrical recrystallization. Therefore the influence of the geometrical recrystallization on the mechanical properties, the cold deformation and the fracture behavior will be analysed to win a fundamental knowledge about the material behavior of the 7xxx-alloys.

对第一个融资期的研究表明，可以同时增强7xxx合金的强度性能和延展性。由于选定的挤出过程和靶向人工衰老的结合，因此可以增强这种增强。在此提案中，将进一步研究有关冷变形和断裂行为的进一步研究，以获取有关7xxx-Alloys（7020，7021.50和7175）的故障机理的详细信息。此外，将挤出空心剖面，由于几何再结晶而显示出不同的结构形态。因此，将分析几何重结晶对机械性能的影响，冷变形和断裂行为，以赢得有关7xxx-Alloys物质行为的基本知识。

项目成果

The influence of natural aging and repeated solution annealing on microstructure and mechanical properties of hot extruded alloys Al 7020 and Al 7175

• DOI: 10.1016/j.msea.2017.10.048
• 发表时间: 2018-01
• 期刊: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
• 影响因子: 6.4
• 作者: M. Paulisch;A. Treff;I. Driehorst;W. Reimers

The influence of heat treatments on the microstructure and the mechanical properties in commercial 7020 alloys

• DOI: 10.1016/j.msea.2014.12.040
• 发表时间: 2015-02-25
• 期刊: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
• 影响因子: 6.4
• 作者: Paulisch, M. C.;Wanderka, N.;Reimers, W.
• 通讯作者: Reimers, W.

The different dependencies of the mechanical properties and microstructures on hot extrusion and artificial aging processing in case of the alloys Al 7108 and Al 7175

• DOI: 10.1016/j.jmatprotec.2016.02.012
• 发表时间: 2016-07-01
• 期刊: JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
• 影响因子: 6.3
• 作者: Paulisch, M. C.;Lentz, M.;Reimers, W.
• 通讯作者: Reimers, W.