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.

含软、硬相材料的疲劳裂纹扩展与软、硬相的空间分布密切相关。在铁素体-马氏体钢中，马氏体区域是阻止微裂纹扩展的屏障。一旦克服了这个障碍，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是非常困难的。这一建议旨在开发铁素体-马氏体钢疲劳裂纹的加载参数，此外，在了解马氏体相的作用，一旦第一个障碍已经突破。在这种情况下，考虑裂纹的三维形状是很重要的，因为在表面上被马氏体区域阻止的裂纹可能会继续向深度方向延伸。

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