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金属及其合金是一类重要的结构和功能材料,广泛应用于航空航天、汽车、造船等行业.金属合金的宏观性能实质上取决于其微观组织,微观组织的演变通常是一个微米范畴的晶体生长过程.由于金属合金的不透明性以及结晶过程的高温环境,长期以来,金属合金的晶体生长过程如同一个黑匣子,一直不为人们所知,只能通过分析最终微观组织或者中间淬火组织来推断黑匣子里可能发生了哪些现象.同步辐射X射线实时成像技术的出现,为实现金属合金晶体生长的原位可视化提供了可能,从而找到了打开这一黑匣子的钥匙.文章介绍了金属合金晶体生长原位可视化研究工作的发展历程及最新进展,列举了应用同步辐射实时成像技术原位观察合金晶体生长行为的典型研究结果,并对该成像技术在金属材料领域的未来应用进行了展望.
Metals and their alloys are a kind of important structural and functional materials, which are widely used in aerospace, automotive, shipbuilding, etc. The macroscopic properties of metal alloys depend essentially on their microstructure. The evolution of microstructures is usually a one-micron crystal Growth process.Due to the opacity of metal alloys and the high temperature environment of the crystallization process, the crystal growth process of metal alloy has long been unknown as a black box, and the black box can only be deduced by analyzing the final microstructure or the intermediate quenching structure The occurrence of synchrotron radiation X-ray real-time imaging technology has made it possible to realize the in-situ visualization of crystal growth of metal alloy, thus finding the key to open this black box.The article introduces the growth of metal alloy crystal in situ Visualization research work of the development process and the latest progress, cited the application of real-time imaging of synchrotron radiation imaging observation of alloy growth behavior of the typical in situ research results, and the imaging technology in the field of metal materials in the future application prospects.