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.

第一个资助期的研究表明，有可能同时提高7xxx合金的强度性能和塑性。这种增强是可能的，由于选定的挤出工艺和有针对性的人工老化的组合。在该提案中，将对冷变形和断裂行为进行进一步研究，以获得有关7xxx合金（7020，7021.50和7175）失效机制的详细信息。此外，由于几何再结晶，中空型材将被挤压出显示不同的结构形态。因此，分析几何再结晶对7xxx合金的力学性能、冷变形和断裂行为的影响，对7xxx合金的材料行为有一定的认识。

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.