Abstract
Mechanical properties of the CoCrFeMnNi high entropy alloy at strain rates (1 × 10−4 s−1 to 0.1 s−1 and 1 × 103 s−1 to 3 × 103 s−1) and at temperatures (298.15, 673.15 and 1073.15 K) are investigated. Hat shaped specimens are used to induce the formation of an adiabatic shear band under controlled shock-loading tests. Results indicate that the yield strength of the CoCrFeMnNi high entropy alloy is increasing sensitively with increasing the strain rates. Grains in the boundary of the shear band in the CoCrFeMnNi high entropy alloy are highly elongated along the shear direction, and the core of the shear band consists of nanotwins and ultrafine equiaxed grains. Rotational dynamic recrystallization takes effects on the formation of the microstructures in the shear band.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Zhang Y, Zuo TT, Tang Z, Gao MC, Dahmen KA, Liaw PK, Lu ZP (2014) Microstructures and properties of high-entropy alloys. Prog Mater Sci 61:1–93
He JY, Wang H, Huang HL, Xu XD, Chen MW, Wu Y, Liu XJ, Nieh TG, An K, Lu ZP (2016) A precipitation-hardened high-entropy alloy with outstanding tensile properties. Acta Mater 102:187–196
Chen Z, Chen W, Wu B, Cao X, Liu L, Fu Z (2015) Effects of Co and Ti on microstructure and mechanical behavior of Al0.75FeNiCrCo high entropy alloy prepared by mechanical alloying and spark plasma sintering. Mater Sci Eng A 648:217–224
Liu Y, Wang J, Fang Q, Liu B, Wu Y, Chen S (2016) Preparation of superfine-grained high entropy alloy by spark plasma sintering gas atomized powder. Intermetallics 68:16–22
Kumar N, Ying Q, Nie X, Mishra RS, Tang Z, Liaw PK, Brennan RE, Doherty KJ, Cho KC (2015) High strain-rate compressive deformation behavior of the Al0.1CrFeCoNi high entropy alloy. Mater Des 86:598–602
Dirras G, Couque H, Lilensten L, Heczel A, Tingaud D, Couzinié J-P, Perrière L, Gubicza J, Guillot I (2016) Mechanical behavior and microstructure of Ti20Hf20Zr20Ta20Nb20 high-entropy alloy loaded under quasi-static and dynamic compression conditions. Mater Charact 111:106–113
Wang B, Fu A, Huang X, Liu B, Liu Y, Li Z, Zan X (2016) Mechanical properties and microstructure of the CoCrFeMnNi high entropy alloy under high strain rate compression. J Mater Eng Perform 25:2985–2992
Li Z, Zhao S, Diao H, Liaw PK, Meyers MA (2017) High-velocity deformation of Al0.3 CoCrFeNi high-entropy alloy: remarkable resistance to shear failure. Sci Rep https://doi.org/10.1038/srep42742 17 Feb 2017
Liu JX, Li SK, Zhou XQ, Zhang ZH, Zheng HY, Wang YC (2008) Adiabatic shear banding in a tungsten heavy alloy processed by hot-hydrostatic extrusion and hot torsion. Scripta Mater 59:1271–1274
Liu JX, Li SK, Zhou XQ, Zhang ZH, Wang YC, Yang J (2011) Dynamic recrystallization in the shear bands of tungsten heavy alloy processed by hot-hydrostatic extrusion and hot torsion. Rare Metal Mat Eng 40:0957–0960
Meyer LW, Pursche F (2012) Experimental methods. In: Dodd B, Bai YL (eds) Adiabatic shear localization, frontiers and advances, 2nd ed. Elsevier Science Ltd. London, pp 21–110
Zerilli FJ, Armstrong RW (1987) Dislocation-mechanics-based constitutive relations for material dynamics calculations. Appl Phys 61:1816–1825
Wang BF, Sun J, Wang X, Fu A (2015) Adiabatic shear localization in a near beta Ti–5Al–5Mo–5V–1Cr–1Fe alloy. Mater Sci Eng A 639:526–533
Meyers MA, Xu YB, Xue Q, Perez-Prado MT, McNelley TR (2003) Microstructural evolution in adiabatic shear localization in stainless steel. Acta Mater 51:1307–1325
Hong CS, Tao NR, Huang X, Lu K (2010) Nucleation and thickening of shear bands in nano-scale twin/matrix lamellae of a Cu–Al alloy processed by dynamic plastic deformation. Acta Mater 58:3103–3116
Liu GZ, Tao NR, Lu K (2010) 316L austenite stainless steels strengthened by means of nano-scale twins. J Mater Sci Technol 26:289–292
Tao NR, Wang ZB, Tong WP, Sui ML, Lu J, Lu K (2002) An investigation of surface nanocrystallization mechanism in Fe induced by surface mechanical attrition treatment. Acta Mater 50:4603–4616
Zaddach AJ, Niu C, Koch CC, Irving DL (2013) Mechanical properties and stacking fault energies of NiFeCrCoMn high-entropy alloy. JOM 65:1780–1789
Schuh B, Mendez-Martin F, Völker B, George EP, Clemens H, Pippan R, Hohenwarter A (2015) Mechanical properties, microstructure and thermal stability of a nanocrystalline CoCrFeMnNi high-entropy alloy after severe plastic deformation. Acta Mater 96:258–268
Acknowledgements
This work was financial supported by State Key Laboratory of Powder Metallurgy , Central South University and by National Natural Science of China (No. 51771231, 51671217). The authors would like to express their sincere thanks to Professor M. A. Meyers at University of California, San Diego for good suggestions and helps. The authors would like to express their sincere thanks to Professor Yang Wang and Yu Wang at University of Science and Technology of China, and Professor Xiang Zan at Hefei University of Technology for dynamic testing. The authors also would like to express their sincere thanks to Dr. Yinghong Lin at FEI Co. for preparation of TEM samples.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Wang, B., Huang, X., Liu, Y., Liu, B. (2018). Mechanical Properties and Shear Localization of High Entropy Alloy CoCrFeMnNi Prepared by Powder Metallurgy. In: & Materials Society, T. (eds) TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72526-0_44
Download citation
DOI: https://doi.org/10.1007/978-3-319-72526-0_44
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-72525-3
Online ISBN: 978-3-319-72526-0
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)