标题：Polymorphic Transformation and Magnetic Properties of Rapidly Solidified Fe26.7Co26.7Ni26.7Si8.9B11.0 High-Entropy Alloys
作者：Zhang, Zequn; Song, Kaikai; Li, Ran; Xue, Qisen; Wu, Shuang; Yan, Delong; Li, Xuelian; Song, Bo; Sarac, Baran; Kim, Jeong Tae; Ram 更多 作者机构：[Zhang, Zequn; Song, Kaikai; Xue, Qisen; Wu, Shuang; Yan, Delong; Li, Xuelian; Wang, Li] Shandong Univ Weihai, Sch Mech Elect & Informat Engn, Weihai 更多
通讯作者地址：[Song, KK]Shandong Univ Weihai, Sch Mech Elect & Informat Engn, Weihai 264209, Peoples R China.
关键词：amorphous alloys; high-entropy alloys; polymorphic transformation;; magnetic properties
摘要：In this work, the microstructural evolution and magnetic performance of the melt-spun amorphous and amorphous-crystalline Fe26.7Co26.7Ni26.7Si8.9B11.0 high-entropy alloys (HEAs) during crystallization were investigated, respectively. Upon heating fully amorphous ribbons, a metastable BCC supersaturated solid solution together with a little Ni31Si12 crystals first precipitated and then the (Fe,Co)(2)B crystals formed until the full crystallization was achieved. With further increasing temperature after full crystallization, a polymorphic transformation from a metastable BCC phase to two types of FCC solid solutions occurred. For the amorphous-crystalline HEAs, the dominant crystallization products were the metastable FCC but not BCC crystals. During crystallization, the primary metastable FCC crystals first transform into the metastable BCC crystals and then the newly-generated BCC phase transforms into two types of FCC phases with further increasing temperature. This temperature dependence of the gradual polymorphic transformation results in the change of magnetic properties of the present high-entropy amorphous alloys.