文章信息/Info

Title:

Applications of synchrotron radiation imaging technology in metallic materials research

作者:

曹  飛; 王同敏

大連理工大學材料科學與工程學院

Author(s):

CAO Fei;  WANG Tongmin

School of Material Science and Engineering, Dalian University of Technology

關鍵詞:

金屬材料; 凝固; 物理場; 細觀損傷; 同步輻射; 原位觀察

Keywords:

metallic materials;  solidification;  physical field;  meso-damage mechanics;  synchrotron radiation;  in-situ observation

DOI:

10.7502/j.issn.1674-3962.2017.03.01

文獻標志碼:

A

摘要:

金屬材料作為一類重要的結構和功能材料，在人類社會發展中一直發揮著重要的作用。研究學者也一直通過多種表征技術來研究金屬材料的微觀組織與性能。然而，金屬材料的不透明特性在很大程度上限制了研究者們對其進行實時動態表征。隨著第三代同步輻射光源的發展，同步輻射成像技術以其強穿透性、高時空分辨率、無損、可視化等優勢在金屬材料研究領域具有顯著的優越性。本文回顧了金屬材料實時原位研究工作的發展歷程，簡單介紹了近十多年來同步輻射二維/三維成像技術在金屬凝固行為（晶粒生長、溶質擴散等）與物理場（電場、磁場和超聲場）調控、材料內部微觀組織結構（枝晶、金屬間化合物形貌演變，析出相空間分布等）、細觀損傷行為（裂紋的萌生、擴展及斷裂機制）等研究中的典型應用，展望了同步輻射光源及成像技術的發展趨勢及此技術在金屬材料領域應用的未來前景。

Abstract:

Metallic materials have been widely applied in many industrial fields as important structural and functional materials because of their excellent physical and mechanical properties. Thus, the metallic materials have been playing an important role in the development of human society. The microstructures and properties of the metallic materials have been studied using various characterization techniques. However, the real-time dynamic characterization was limited to a great extent due to the opaque feature of metallic materials. With the development of the third generation synchrotron radiation light source, the synchrotron radiation real time imaging technology with strong penetrability, high spatiotemporal resolution, nondestructive and visualization features show its remarkable advantages in the field of metallic materials research. In this paper, the development of real time and in situ research work on metallic materials are reviewed. The typical applications of synchrotron radiation 2D/3D imaging techniques are briefly introduced, for example, the observation of the classical solidification behavior (grain growth, solute diffusion, modification mechanisms, et al.) with and without the physical field (electric field, magnetic field and ultrasonic field), the static/dynamic 3D characterization of the solidification microstructure (dendrites morphology, intermetallic compounds, precipitates, et al.) and the internal defect (spatial distribution of voids, inclusions, et al.) which related to the meso-damage mechanics of metallic materials (crack initiation, propagation and fracture). Finally, the future development of the imaging techniques and the prospect applications in metallic materials are prospected.