珠光体、贝氏体和马氏体钢的SPD变形
SPD deformation of pearlitic, bainitic and martensitic steels
AI总结：
本文研究了珠光体、贝氏体和马氏体钢在剧烈塑性变形中的硬化行为，发现其微观结构最终趋于约10 nm的纳米晶结构，为超高强材料的开发提供了重要参考。
摘要：
本文总结了近全珠光体、贝氏体和马氏体钢在剧烈塑性变形（SPD）过程中的变形行为。尽管它们的屈服应力和微观结构存在显著差异，但它们在SPD过程中的硬化行为却十分相似。由于具有极大的硬化能力，SPD变形受到工具材料强度的限制。在可达到的应变极限下，其微观结构非常相似，均为约10 nm量级的纳米晶结构，具体取决于可获得的应变。纳米晶粒部分被碳过饱和，且晶界由碳稳定。另一特征是晶粒形状的各向异性，这导致了强度、延展性和断裂韧性的各向异性。这些结果对于超高强材料的开发具有重要意义，并且对此类钢尤为关键，因为它们常用于滚动接触和滑动接触行为至关重要的应用场合。
英文摘要：
The deformation behavior of nearly fully pearlitic, bainitic and martensitic steels during severe plastic deformation is summarized in this paper. Despite their significantly different yield stresses and their microstructures, their hardening behavior during SPD is similar. Due to the enormous hardening capacity the SPD deformation is limited by the strength of the tool materials. The microstructure at the obtainable limit of strain are quite similar, which is a nanocrystalline structure in the order of 10 nm, dependent on the obtainable strain. The nanograins are partially supersaturated with carbon and the grain boundaries are stabilized by carbon. Another characteristic feature is the anisotropy in grain shape which results in an anisotropy of strength, ductility and fracture toughness. The results are important for the development of ultra-strong materials and essential for this type of steels which are frequently used for application where the behavior under rolling contact and sliding contact is important.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
