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侯丽丽,要玉宏,梁霄羽,陈建,刘江南.AlxFeCoNiB0.1高熵合金的微观组织和力学性能研究[J].稀有金属材料与工程(英文),2019,48(1):111~115.[Hou Lili,Yao Yuhong,Liang Xiaoyu,Chen Jian and Liu Jiangnan.Microstructure and mechanical properties of AlxFeCoNiB0.1 high entropy alloy[J].Rare Metal Materials and Engineering,2019,48(1):111~115.]
Microstructure and mechanical properties of AlxFeCoNiB0.1 high entropy alloy
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Received:December 14, 2017  Revised:January 02, 2018
DOI:
Key words: high-entropy alloys  microstructure  comprehensive mechanical properties
Foundation item:国家自然科学基金资助(项目号51571155, 51671150,51471123)
Author NameAffiliation
Hou Lili,Yao Yuhong,Liang Xiaoyu,Chen Jian and Liu Jiangnan  
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Abstract:
      AlxFeCoNiB0.1 (x=0.4, 0.5, 0.8, 1.2, 1.6where, x is the mole percentage) were prepared by vacuum arc melting.The microstructure and mechanical property of AlxFeCoNiB0.1 high-entropy alloys were investigated. With the increase of Al content, the cast dendrites of the alloy were changed from FCC phase to B2 (AlNi) /BCC phase. When x= 0.4 and 0.5, the microstructures of the alloy were consisted of the dendrite FCC phase and the interdendritic B2 phase and (Fe, Co) 2B; when x=0.8, the dendrites were composed of B2 phase, and the interdendrites were composed of FCC phase and (Fe, Co) 2B; when x=1.2, the interdendritic structures were consisted of the eutectic FCC+ (Fe, Co) 2B, and the nanoscale granulars are the BCC phase;When x=1.6, the eutectic structures disappeared. With the increase of Al content, the compressive strength increased first and then decreased. When the content of Al was 0.8, it reached the peak value of 2243MPa. Appropriated amount of Al can improve the comprehensive mechanical properties of high entropy alloy。