Investigation of combined influence of skin pass rolling and roller straightening of a thin sheet made of materials with different crystal lattice on microstructure, texture, static and fatigue strength

不同晶格材料薄板平整轧制和辊式矫直对显微组织、织构、静态强度和疲劳强度的综合影响研究

• 批准号: 290141559
• 负责人: Professor Dr.-Ing. Hans Jürgen Maier, since 4/2018
• 金额: --
• 依托单位: Institut für Werkstoffkunde (IW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/290141559?language=en
• 关键词: Investigation; combined; influence; skin; pass

Skin pass rolling and roller straightening represent the final operations in sheet production and decisively determine the resulting microstructural and mechanical properties of the products. In preliminary investigations, it was shown that the intensity of the influence of these forming operations depends inter alia on material lattice structure. Further investigation is required on the combined influence on sheet properties as a result of monotonous forming by skin pass rolling which induces material work hardening and cyclical forming by roller straightening, which could induce either work hardening or work softening. Since sheet metal parts are subject to not only static but also cyclical mechanical stresses in later operations the residual stress state is of essential significance in addition to work hardening or softening. Thus, a comprehensive material characterization is required concerning mechanical properties during static and cyclical stresses. The work programme of the planned project includes the analysis of changes in mechanical properties during static and cyclical stresses as well as the investigation of microstructure and texture of sheets during various skin pass rolling and roller straightening conditions including the s-shape enclosing the rolls. The scientific aim of the planned research project is the investigation of combined influence of monotonous forming during skin pass rolling and cyclical forming during roller straightening of sheets made of materials with different crystal lattices (DC01, Cu, Alpha-Ti) on microstructure, texture, the level and sign of residual stresses, and the mechanical properties within the framework of static and cyclical experiments. The practical aim of the project is the development of an appropriate technology for production of sheets with load-adjusted microstructure, texture, and a high static and fatigue strength by a suitable combination of monotonous forming by skin pass rolling and cyclical forming by roller straightening conditions.

皮肤通行滚动和滚筒拉直代表了薄板生产中的最终操作，并果断地确定了产品的微观结构和机械性能。在初步研究中，表明这些形成操作的影响的强度取决于材料晶格结构。由于皮肤通行滚动形成单调的形成，需要进一步研究对板性特性的综合影响，这会诱导材料工作硬化和滚筒伸直的周期性形成，这可能会诱导工作硬化或工作变软。由于钣金零件不仅要受到静态的影响，而且还受到以后操作中的周期性机械应力，因此，残留应力状态除了工作硬化或软化外，具有重要意义。因此，需要在静态和周期性应力期间具有机械性能的全面材料表征。计划项目的工作计划包括分析静态和周期性应力期间机械性能的变化，以及在各种皮肤通行滚动和滚动拉直条件下对微观结构和床单的纹理的研究，包括围绕卷的S型。计划研究项目的科学目的是调查在皮肤传递滚动过程中单调形成的组合影响和在滚筒滚动期间，在滚动滚动型滚动板时，由具有不同晶体晶格（DC01，CU，Alpha-ti）制成的材料制成的板，对微观结构，纹理，纹理，纹理和遗物的迹象以及在遗留下的机械性能以及稳定的机械性能的范围。该项目的实际目的是开发适当的技术，用于生产具有负载调整的微观结构，质地的床单，并通过适当地结合通过皮肤通行滚动和周期性的形成单调形成的组合，并通过滚动拉直条件组合单调形成。

项目成果

Influence of Alternating Short-Cycle Bending on the Mechanical Properties of Copper, α-Titanium and the Mild Steel DC01

交替短周期弯曲对铜、α-钛和低碳钢DC01力学性能的影响

• DOI: 10.1007/s11665-019-04458-5
• 发表时间: 2019
• 期刊: Journal of Materials Engineering and Performance
• 影响因子: 2.3
• 作者: Barienti;Herbst;Nürnberger
• 通讯作者: Nürnberger

Influence of Pre-strain on Very-Low-Cycle Stress–Strain Response and Springback Behavior

预应变对极低周应力应变响应和回弹行为的影响

• DOI: 10.1007/s11665-020-05399-0
• 发表时间: 2020
• 期刊: Journal of Materials Engineering and Performance
• 影响因子: 2.3
• 作者: Barienti;Wackenrohr;Herbst;Nürnberger
• 通讯作者: Nürnberger

The Influence of Alternating Low-Cycle Bending Loads on Sheet Properties Having an Hcp Crystal Lattice

• DOI: 10.1007/s11665-018-3123-2
• 发表时间: 2018-01
• 期刊: Journal of Materials Engineering and Performance
• 影响因子: 2.3
• 作者: E. Demler;D. Rodman;M. Rodman;G. Gerstein;O. Grydin;A. A. Briukhanov-A.;C. Klose;F. Nürnberger;H. Maier