材料科学
同步加速器
微观结构
相(物质)
合金
衍射
高能
动力学
耐火材料(行星科学)
热力学
冶金
高熵合金
结晶学
光学
物理
工程类
有机化学
化学
量子力学
工程物理
作者
Angelo F. Andreoli,Rafael G. Mendes,V.T. Witusiewicz,O. Shuleshova,Marijn A. van Huis,Kornelius Nielsch,I. Kaban
出处
期刊:Acta Materialia
[Elsevier]
日期:2021-12-01
卷期号:221: 117416-117416
被引量:20
标识
DOI:10.1016/j.actamat.2021.117416
摘要
Time- and temperature-resolved phase formation in the equiatomic NbTiVZr refractory high-entropy alloy has been studied in situ using high-energy synchrotron X-ray diffraction and high-speed video imaging during non-equilibrium solidification. Phase formation is shown to be dependent on the solidification conditions. When the melt is undercooled over 80 K it crystallizes as a bcc single-phase solid solution despite solute partitioning between dendrites and interdendritic regions. When the sample is for some time kept in the semisolid state, two additional bcc phases form in the interdendritic regions. The crystal growth velocity for the NbTiVZr alloy, as estimated from the high-speed videos, shows pronounced sluggish kinetics.
科研通智能强力驱动
Strongly Powered by AbleSci AI