High-entropy alloys (HEAs) have generated interest in recent years due to their unique positioning within the alloy world. By incorporating a number of elements in high proportion, usually of equal atomic percent, they have high configurational entropy, and thus, they hold the promise of interesting and useful properties such as enhanced strength and alloy stability. The present study investigates the mechanical behavior, fracture characteristics, and microstructure of two single-phase FCC HEAs CoCrFeNi and CoCrFeNiMn with some detailed attention given to melting, homogenization, and thermo-mechanical processing. Ingots approaching 8 kg in mass were made by vacuum induction melting to avoid the extrinsic factors inherent to small-scale laboratory button samples. A computationally based homogenization heat treatment was given to both alloys in order to eliminate any solidification segregation. The alloys were then fabricated in the usual way (forging, followed by hot rolling) with typical thermo-mechanical processing parameters employed. Transmission electron microscopy was subsequently used to assess the single-phase nature of the alloys prior to mechanical testing. Tensile specimens (ASTM E8) were prepared with tensile mechanical properties obtained from room temperature through 800 A degrees C. Material from the gage section of selected tensile specimens was extracted to document room and elevated temperature deformation within the HEAs. Fracture surfaces were also examined to note fracture failure modes. The tensile behavior and selected tensile properties were compared with results in the literature for similar alloys.
机构:
Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R ChinaCent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
Xiang, Li
Guo, Wenmin
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Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R ChinaCent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
Guo, Wenmin
Liu, Bin
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Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R ChinaCent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
Liu, Bin
Fu, Ao
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Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R ChinaCent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
Fu, Ao
Li, Jianbo
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Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400044, Peoples R ChinaCent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
Li, Jianbo
Fang, Qihong
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机构:
Hunan Univ, Coll Mech & Vehicle Engn, Changsha 410082, Peoples R ChinaCent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
Fang, Qihong
Liu, Yong
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Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R ChinaCent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
机构:
School of Materials Science and Engineering, Northeastern University
School of Resources and Materials, Northeastern University at QinhuangdaoSchool of Materials Science and Engineering, Northeastern University
QU HuaiZhi
GONG MingLong
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School of Materials Science and Engineering, Northeastern University
School of Resources and Materials, Northeastern University at QinhuangdaoSchool of Materials Science and Engineering, Northeastern University
GONG MingLong
LIU FengFang
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School of Resources and Materials, Northeastern University at QinhuangdaoSchool of Materials Science and Engineering, Northeastern University
LIU FengFang
GAO BingYu
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School of Resources and Materials, Northeastern University at QinhuangdaoSchool of Materials Science and Engineering, Northeastern University
GAO BingYu
BAI Jing
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School of Materials Science and Engineering, Northeastern University
School of Resources and Materials, Northeastern University at QinhuangdaoSchool of Materials Science and Engineering, Northeastern University
BAI Jing
GAO QiuZhi
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School of Materials Science and Engineering, Northeastern University
School of Resources and Materials, Northeastern University at QinhuangdaoSchool of Materials Science and Engineering, Northeastern University
GAO QiuZhi
LI Song
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School of Resources and Materials, Northeastern University at QinhuangdaoSchool of Materials Science and Engineering, Northeastern University
机构:
School of Mechanic and Electrical Engineering,Henan University of TechnologySchool of Mechanic and Electrical Engineering,Henan University of Technology
Qin Xu
Qi Wang
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机构:
National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of TechnologySchool of Mechanic and Electrical Engineering,Henan University of Technology
Qi Wang
De-zhi Chen
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机构:
National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of TechnologySchool of Mechanic and Electrical Engineering,Henan University of Technology
De-zhi Chen
Yi-ang Fu
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School of Mechanic and Electrical Engineering,Henan University of TechnologySchool of Mechanic and Electrical Engineering,Henan University of Technology
Yi-ang Fu
Qing-sheng Shi
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School of Mechanic and Electrical Engineering,Henan University of TechnologySchool of Mechanic and Electrical Engineering,Henan University of Technology
Qing-sheng Shi
Ya-jun Yin
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机构:
State Key Laboratory of Materials Processing and Die & Mould Technology,Huazhong University of Science & TechnologySchool of Mechanic and Electrical Engineering,Henan University of Technology
Ya-jun Yin
Shu-yan Zhang
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Centre of Excellence for Advanced Materials,Songshan LakeSchool of Mechanic and Electrical Engineering,Henan University of Technology