文章信息/Info

Title:

Application of Synchrotron X�瞨ay Imaging in Solidification of Metallic Materials

作者:

帥三三; 王江; 任忠鳴

上海大學(xué)材料科學(xué)與工程學(xué)院 省部共建高品質(zhì)特殊鋼冶金與制備國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 200444

Author(s):

SHUAI Sansan;  WANG Jiang;  REN Zhongming

State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

關(guān)鍵詞:

X ray成像; 同步輻射; 金屬凝固; 原位表征; 微觀結(jié)構(gòu)演化

Keywords:

X ray imaging;  synchrotron radiation;  metal solidification;  in situ observation;  microstructure evolution

DOI:

10.7502/j.issn.1674-3962.2019.01.08

文獻(xiàn)標(biāo)志碼:

A

摘要:

X ray具有較強(qiáng)的穿透性，可以穿透一定厚度的金屬塊狀材料（毫米級(jí)的重金屬，如鋼、鎳基合金等和厘米級(jí)的輕質(zhì)金屬，如鋁、鎂合金等），因而可以用來(lái)對(duì)其進(jìn)行成像，獲得其內(nèi)部二維和三維微觀結(jié)構(gòu)。X�瞨ay成像技術(shù)對(duì)被表征物體的成像是非破壞性的（non�瞕estructive），因而在一定的時(shí)間和空間分辨率條件下，還可以對(duì)金屬材料成形過(guò)程的組織演化實(shí)時(shí)觀測(cè)，實(shí)現(xiàn)對(duì)金屬材料成形過(guò)程宏/微觀結(jié)構(gòu)演化的原位表征。第三代同步輻射光源可以產(chǎn)生高通量、高能量、高分辨率以及高相干性的X�瞨ay光束，利用它可以實(shí)現(xiàn)對(duì)金屬材料從宏觀（厘米級(jí)）到微觀（微米、亞微米、納米級(jí)）結(jié)構(gòu)及其演化過(guò)程快速、準(zhǔn)確的測(cè)量表征。X�瞨ay成像技術(shù)已經(jīng)成為研究金屬凝固科學(xué)問(wèn)題的有力手段。簡(jiǎn)介了X�瞨ay成像技術(shù)的基本原理，綜述了X�瞨ay成像技術(shù)在金屬凝固組織三維（3D）表征和組織演化過(guò)程二維和四維（3D+時(shí)間）原位表征中的應(yīng)用。最后對(duì)未來(lái)X�瞨ay成像技術(shù)在金屬材料凝固領(lǐng)域的應(yīng)用前景進(jìn)行了展望。

Abstract:

X ray is able to penetrate bulk metallic materials with specific thickness (millimeter scale for heavy metal like iron or nickel based alloys and centimeter scale for light alloys like aluminum or magnesium) due to its high penetrability. Therefore, it can be used for materials imaging to obtain their two dimensional (2D) and three dimensional (3D) microstructures. Comparing to traditional characterization methods, X�瞨ay imaging is non�瞕estructive and can be applied for in situ and real�瞭ime observation of microstructure evolution during material processing under certain space and time resolution. The third generation of synchrotron X�瞨ay source can generate high flux, high energy, high resolution and high coherence X�瞨ay beam with which we can achieve precise and fast real�瞭ime characterization and measurement of microstructure evolution of metallic alloy from macro�瞫cale (centimeter) to micro�瞫cale (micron or sub�瞞icron and nanometer). In this paper, the principle theory of X�瞨ay imaging method and its application in metal solidification microstructure static 3D characterization and 2D and 4D (3D plus time) in situ observation of structure evolution are reviewed. Finally, the potential applications of X�瞨ay imaging in solidification of metallic materials are also expected.