In-depth growth of micro-cracks in a ferritic-martensitic steel

铁素体-马氏体钢中微裂纹的深度生长

• 批准号: 146762555
• 负责人: Professorin Dr. Angelika Brückner-Foit
• 金额: --
• 依托单位: Fachgebiet Qualität und Zuverlässigkeit
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/146762555?language=en
• 关键词: depth; growth; micro; cracks; ferritic

The extension of fatigue cracks in materials containing soft and hard phases is strongly dependent on the spatial distribution of the phases. Martensite region act as a barrier against micro-crack extension in a ferritic-martensitic steel. Once this barrier has been overcome the crack extends along rather tortuous crack paths. This implies that a detailed fracture mechanics analysis of these fatigue cracks is very difficult. This proposal aims at developing loading parameters for fatigue cracks ina ferritic-martensitic steel, and , in addition, at understanding the role of the martensitic phase once the first barrier har been breached. In this context, it is improtant to take the three-dimensional shape of the crack into accout, as a crack which has been stopped by a martensite region on the surface may continue to extend in depth direction.

含有软相和硬相的材料中疲劳裂纹的扩展很大程度上取决于相的空间分布。马氏体区域充当铁素体-马氏体钢中防止微裂纹扩展的屏障。一旦克服了这一障碍，裂缝就会沿着相当曲折的裂缝路径延伸。这意味着对这些疲劳裂纹进行详细的断裂力学分析非常困难。 该提案旨在开发铁素体-马氏体钢中疲劳裂纹的载荷参数，此外，还旨在了解第一势垒被突破后马氏体相的作用。在这种情况下，重要的是考虑裂纹的三维形状，因为被表面马氏体区域阻止的裂纹可能会继续沿深度方向延伸。

项目成果

Influence of Martensitic Phase on Microcrack Propagation in a Ferritic-Martensitic Steel

马氏体相对铁素体-马氏体钢中微裂纹扩展的影响

• DOI: 10.4028/www.scientific.net/amr.891-892.301
• 发表时间: 2014
• 期刊: Advanced Materials Research
• 作者: A. Brueckner-Foit;P. Pitz;F. Zeismann;Lisa Zellmer
• 通讯作者: Lisa Zellmer

Analysis of the Crack Opening Displacement of a Surface Crack Using X-ray Tomography

利用 X 射线断层扫描分析表面裂纹的裂纹张开位移

• DOI: 10.1016/j.mspro.2014.06.308
• 发表时间: 1913
• 期刊: Procedia Materials Science
• 作者: P. Pitz;F. Zeismann;A. Brueckner-Foit;J. Foit;B. Mattheis;T. Vesper
• 通讯作者: T. Vesper

Determination of Crack Face Displacement by X-ray Tomography and Digital Volume Correlation

通过 X 射线断层扫描和数字体积相关确定裂纹面位移

• DOI: 10.1016/j.proeng.2014.06.290
• 发表时间: 2014
• 期刊: Procedia Engineering
• 作者: A. Brueckner-Foit;F. Zeismann;L. Zellmer
• 通讯作者: L. Zellmer