A high-Nb-TiAl alloy with ultrafine-grained structure fabricated by cryomilling and spark plasma sintering

作     者：Hao Deng Yong-Qiang Wei Jun Tang Ai-Jun Chen Long-Qing Chen Zu-Xi Xia Hao Deng;Yong-Qiang Wei;Jun Tang;Ai-Jun Chen;Long-Qing Chen;Zu-Xi Xia

作者机构：Key Laboratory of Radiation Physics and Technology of Ministry of EducationInstitute of Nuclear Science and TechnologySichuan UniversityChengdu610064China The Second Research Institute of Civil Aviation Administration of China(CAAC)Chengdu610064China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第5期

页      面：1678-1685页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(No.11475118) 

主　　题：Cryomilling Spark plasma sintering Titanium aluminide Ultrafine-grained structure 

摘      要：In this work,an ultrafine-grained high-Nb-TiAl alloy with a nominal composition of Ti-45Al-8Nb-0.2W-0.2B(at%)was prepared by cryomilling and subsequent spark plasma sintering(SPS)*** chemical composition,particle size,morphology and crystallite size of cryomilled powder were *** is found that cryomilling can effectively reduce the particle size and enhance grain *** ingots sintered at 900 and 1000℃ show an equiaxed near-γmicrostructure with grain sizes700 nm,while the sample sintered at 1100℃exhibits duplex ***,the one sintered at 1000℃ has excellent mechanical properties,whose compression yield strength,fracture strength,bending strength and plastic strain achieve 1310,2174,578 MPa and 16.8%,*** reasons for the effect of cryomilling and the mechanical behavior of sintered ingots were *** is suggested that cryomilling in combination with SPS is an effective way to synthesize high-NbTiAl alloy with ultrafine-grained structure.