The influence of cold rolling on the fatigue crack growth (FCG) behavior of pure tungsten was investigated. For that tungsten sheets with three different thicknesses (2 mm, 1 mm and 100 μm) corresponding to different degrees of deformation were selected to prepare compact-tension (CT) and single edge notched tension (SENT) specimens. To account for orientation influences the crack propagation direction parallel, perpendicular and under 45° to the rolling direction was investigated. It could be shown that a pronounced cyclic R-curve behavior evolves, leading to relatively high thresholds of stress intensity factor range ΔK_th, even at high load ratios. Furthermore, for the smallest grain size a pronounced anisotropy of the FCG behavior was observed where the crack growth direction perpendicular to the rolling direction exhibits the highest ΔK_th and the lowest crack growth-rates. Especially the tungsten foils with 100 μm thickness showed stable crack growth with a pronounced Paris-regime. As a consequence, cold rolled tungsten qualifies as a fatigue resistant laminate material applicable for future structural applications in harsh environments.

研究了冷轧对纯钨疲劳裂纹扩展（FCG）行为的影响。为此，选择具有对应于不同变形程度的三种不同厚度（2 mm，1 mm和100μm）的钨薄板，以制备密实张力（CT）和单边缘缺口张力（SENT）样品。为了考虑取向影响，研究了平行于，垂直于且与轧制方向成45°角的裂纹扩展方向。它可以表明，一个显着的环状R曲线行为的演变，导致应力强度因子范围ΔK的相对高的阈值_次，即使在高负载比的情况下。此外，用于最小粒度观察FCG行为的显着各向异性，其中在垂直于轧制方向的裂纹生长方向表现出最高的ΔK_个和最低裂纹增长速率。特别是厚度为100μm的钨箔在明显的巴黎制度下表现出稳定的裂纹扩展。因此，冷轧钨具有作为抗疲劳层压材料的资格，可用于恶劣环境下的未来结构应用。