同步辐射成像技术在金属材料研究中的应用

发布时间：2019-02-14 19:57

【摘要】：金属材料作为一类重要的结构和功能材料,在人类社会发展中一直发挥着重要的作用。研究者也一直通过多种表征技术来研究金属材料的微观组织与性能。然而,金属材料的不透明特性在很大程度上限制了研究者们对其进行实时动态表征。随着第三代同步辐射光源的发展,同步辐射成像技术以其强穿透性、高时空分辨率、无损、可视化等优势在金属材料研究领域具有显著的优越性。回顾了金属材料实时原位研究工作的发展历程,简要介绍了近十多年来同步辐射二维/三维成像技术在金属凝固行为(晶粒生长、溶质扩散等)与物理场(电场、磁场和超声场)调控、材料内部微观组织结构(枝晶、金属间化合物形貌演变,析出相空间分布等)、细观损伤行为(裂纹的萌生、扩展及断裂机制)等研究中的典型应用,展望了同步辐射光源及成像技术的发展趋势及此技术在金属材料领域应用的未来前景。
[Abstract]:As a kind of important structural and functional materials, metal materials have been playing an important role in the development of human society. Researchers have been studying the microstructure and properties of metal materials by various characterization techniques. However, the opacity of metallic materials greatly limits the real-time dynamic characterization of metal materials. With the development of the third generation synchrotron radiation light source, synchrotron radiation imaging technology has obvious advantages in the field of metal materials research because of its strong penetration, high spatial and temporal resolution, nondestructive, visual and other advantages. In this paper, the development of real time in situ study of metal materials is reviewed, and the synchrotron radiation 2D / 3D imaging technique in solidification behavior (grain growth, solute diffusion, etc.) and physical field (electric field) in the past ten years is briefly introduced. Typical applications in the studies of microstructures (dendrites, morphologies of intermetallic compounds, spatial distribution of precipitated phases, etc.), meso-damage behavior (crack initiation, propagation and fracture mechanism) in materials under the control of magnetic and ultrasonic fields, The development trend of synchrotron radiation light source and imaging technology and the future application of this technology in the field of metal materials are prospected.
【作者单位】：大连理工大学材料科学与工程学院辽宁省凝固控制与数字化制备技术重点实验室;
【基金】：国家杰出青年科学基金资助项目(51525401) 大连市高层次人才创新支持计划(顶尖及领军人才,2015 R013)
【分类号】：TG115.2

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