The outstanding tensile strength of Ni-rich high entropy superalloy fabricated by powder metallurgical process

被引：17
作者：
Byungchul, Kang [1 ]
Kong, Taeyeong [1 ]
Ryu, Ho Jin [2 ]
Hong, Soon Hyung [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, 291 Daehak Ro, Daejeon 34141, South Korea
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2019年 / 235卷
基金：
新加坡国家研究基金会;
关键词：
High entropy alloy; Powder metallurgy; High entropy superalloy; Spark plasma sintering; Yield strength; SINTERING TEMPERATURE; MECHANICAL-PROPERTIES; ALLOY; MICROSTRUCTURE; DESIGN; BEHAVIOR; ELEMENTS;
D O I：
10.1016/j.matchemphys.2019.121749
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work reports the microstructure and tensile properties of a Ni-rich high-entropy superalloy (HESA; Ni46Co22Al12Cr8Fe8Ti3Mo1) having outstanding tensile properties, including yield strength of 1355 MPa and fracture elongation of 8.7%. Powder metallurgical (PM) processes were used to fabricate the present HESA with homogeneous and fine-grained microstructure. A large number of gamma' precipitates were homogeneously distributed in a face-centered cubic (FCC) matrix. By using PM processes, a nanoscale grain size was achieved, and ultrafine TiC and Al2O3 dispersoids were uniformly formed within the FCC matrix. The outstanding mechanical properties of the HESA were attributed to the combined effect of grain boundary strengthening, solid solution strengthening, precipitate formation and dispersion strengthening.
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页数：6
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共 28 条
[1]   Design of Novel Precipitate-Strengthened Al-Co-Cr-Fe-Nb-Ni High-Entropy Superalloys [J].
Antonov, Stoichko ;
Detrois, Martin ;
Tin, Sammy .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2018, 49A (01) :305-320
[2]   Effect of sintering temperature on tribological behavior of Ce-TZP/Al2O3-aluminum nanocomposite [J].
Bahrami, A. ;
Soltani, N. ;
Pech-Canul, M. I. .
JOURNAL OF COMPOSITE MATERIALS, 2015, 49 (28) :3507-3514
[3]   Carbon uptake during Spark Plasma Sintering: investigation through the analysis of the carbide "footprint" in a Ni-W alloy [J].
Bokhonov, B. B. ;
Ukhina, A. V. ;
Dudina, D. V. ;
Anisimov, A. G. ;
Mali, V. I. ;
Batraev, I. S. .
RSC ADVANCES, 2015, 5 (98) :80228-80237
[4]   Heavy carbon alloyed FCC-structured high entropy alloy with excellent combination of strength and ductility [J].
Chen, L. B. ;
Wei, R. ;
Tang, K. ;
Zhang, J. ;
Jiang, F. ;
He, L. ;
Sun, J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 716 :150-156
[5]   Competition between elements during mechanical alloying in an octonary multi-principal-element alloy system [J].
Chen, Yu-Liang ;
Hu, Ya-Huei ;
Hsieh, Cheng-An ;
Yeh, Jien-Wei ;
Chen, Swe-Kai .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 481 (1-2) :768-775
[6]   The tensile properties and serrated flow behavior of a thermomechanically treated CoCrFeNiMn high-entropy alloy [J].
Fu, J. X. ;
Cao, C. M. ;
Tong, W. ;
Hao, Y. X. ;
Peng, L. M. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 690 :418-426
[7]   Microstructure and strengthening mechanisms in an FCC structured single-phase nanocrystalline Co25Ni25Fe25Al7.5Cu17.5 high-entropy alloy [J].
Fu, Zhiqiang ;
Chen, Weiping ;
Wen, Haiming ;
Zhang, Dalong ;
Chen, Zhen ;
Zheng, Baolong ;
Zhou, Yizhang ;
Lavernia, Enrique J. .
ACTA MATERIALIA, 2016, 107 :59-71
[8]   A fracture-resistant high-entropy alloy for cryogenic applications [J].
Gludovatz, Bernd ;
Hohenwarter, Anton ;
Catoor, Dhiraj ;
Chang, Edwin H. ;
George, Easo P. ;
Ritchie, Robert O. .
SCIENCE, 2014, 345 (6201) :1153-1158
[9]   Oxide dispersion strengthened CoCrFeNiMn high-entropy alloy [J].
Hadraba, Hynek ;
Chlup, Zdenek ;
Dlouhy, Antonin ;
Dobes, Ferdinand ;
Roupcova, Pavia ;
Vilemova, Monika ;
Matejicek, Jiri .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 689 :252-256
[10]   A novel Fe20Co20Ni41Al19 eutectic high entropy alloy with excellent tensile properties [J].
Jin, Xi ;
Zhou, Yang ;
Zhang, Lu ;
Du, Xingyu ;
Li, Bangsheng .
MATERIALS LETTERS, 2018, 216 :144-146
123