In-Situ X-ray Laminography with Bi-axial Loads for the Multiscale Investigation of Damage Formation in Materials for Transportation

双轴载荷原位 X 射线层析成像用于运输材料损伤形成的多尺度研究

• 批准号: 391911929
• 负责人: Professor Dr. Tilo Baumbach
• 金额: --
• 依托单位: Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/391911929?language=en
• 关键词: Situ; ray; Laminography; Bi; axial

In the pursuit of lighter materials and optimized thin-walled components for transportation, knowledge about the characteristic ductile damage mechanisms in metal sheets is key. For the highly application-relevant bi-axial loading with load path changes, the strain-damage interaction is not understood. Thus, our proposal aims at three-dimensional (3D) imaging of the microstructure inside flat sheet specimens evolving during material testing under such loads. For this, we extend the capability of in situ synchrotron laminography to overcome inherent insufficience of other 3D techniques for such kind of samples. It shall be developed into a unique multiscale approach from a few hundred micrometers down to nanometer scale to determine the ductile damage nucleation and growth kinetics. Such hierarchical 3D data will serve as valuable input for microscopic simulations and the formulation and validation of continuum damage models suited to predict engineering-relevant mechanical properties.

在追求更轻的材料和优化的运输用薄壁部件的过程中，了解金属板的特征延性损伤机制是关键。对于与应用高度相关且载荷路径变化的双轴载荷，应变-损伤相互作用尚不清楚。因此，我们的建议旨在对在此类负载下进行材料测试期间演变的平板样品内部微观结构进行三维 (3D) 成像。为此，我们扩展了原位同步加速器层析成像的能力，以克服其他 3D 技术对于此类样品的固有不足。它将发展成一种独特的多尺度方法，从几百微米到纳米尺度，以确定延性损伤成核和生长动力学。这种分层 3D 数据将作为微观模拟以及适合预测工程相关机械性能的连续损伤模型的制定和验证的宝贵输入。