The suitability of high-strength ultrafine and nanocrystalline materials processed by severe plastic deformation methods and aimed to be used for structural applications will strongly depend on their resistance against crack growth. In this contribution some general available findings on the damage tolerance of this material class will be summarized. Particularly, the occurrence of a pronounced fracture anisotropy will be in the center of discussion. In addition, the great potential of this generated anisotropy to obtain high-strength materials with exceptionally high fracture toughness in specific loading and crack growth directions will be enlightened.

IMPACT STATEMENT

Severely plastically deformed materials are reviewed in light of their damage tolerance. The frequently observed toughness anisotropy allows unprecedented fracture toughness – strength combinations.

通过严格的塑性变形方法加工并旨在用于结构应用的高强度超细和纳米晶体材料的适用性，将在很大程度上取决于其对裂纹增长的抵抗力。在此贡献中，将总结一些有关该材料类别的损伤耐受性的一般可用发现。特别地，明显的断裂各向异性的发生将在讨论的中心。另外，这种各向异性的巨大潜力将被获得，以得到在特定载荷和裂纹扩展方向上具有异常高的断裂韧性的高强度材料。

影响陈述

对于严重塑性变形的材料，请根据其损坏容忍度进行审查。经常观察到的韧性各向异性可实现前所未有的断裂韧性-强度组合。