36th Risø International Symposium on Materials Science

作者：Søren Fæster, Niels Ebbesen Hansen, C. S. Hong, Xiaoxu Huang, Dorte Juul Jensen, O.V. Mishin, Jong-Won Sun, Tonghui Yu, Y B Zhang · 发表于：IOP Conference Series Materials Science and Engineering · 年份：2015 · DOI：10.1088/1757-899x/89/1/011001 · 被引用次数：20 · 研究领域：Microstructure and mechanical properties

The 36th Risø Symposium focuses on the effects of deformation-induced structural variations on annealing mechanisms. Although it is widely recognized that the processes occurring during annealing of deformed metals are determined by the local environment in which they occur, much of the current understanding, analysis and modelling is based on larger scale considerations. Recent detailed investigations of deformation microstructures have led to a paradigm shift in the way these structures are characterized and analyzed. It is now clear that deformation microstructures are hierarchical, with dislocations and deformation-induced boundaries subdividing the original grains. This subdivision means that there are variations in the crystallographic orientations and in the distribution of stored energy on the scale of the subdivision, which typically is on the micrometer, sub-micrometer or nanometer scale. Structural variations in this subdivision may also be present from grain to grain in polycrystalline materials, thereby introducing variations on the grain scale. Finally, processing may also introduce structural variations on even larger scales. There are thus structural variations at many length scales, all of which play an essential role in subsequent annealing processes and in property optimization. Recent advances in incorporating these structural variations into the understanding of annealing mechanisms and of how they affect the mechanical and physical properties of annealed...