Citation: | WANG Lei, GAO Jinchang, BAO Xiaogang, LIN Wanming, GUO Ruipeng. Effects of mechanical milling on microstructure and tensile properties of CoCrFeMnNi high-entropy alloys produced by spark plasma sintering[J]. Powder Metallurgy Technology, 2024, 42(6): 645-651. DOI: 10.19591/j.cnki.cn11-1974/tf.2023010001 |
CoCrFeMnNi high-entropy alloys with nearly full density were fabricated by spark plasma sintering (SPS) process. The effects of mechanical milling on the microstructure and tensile properties of the CoCrFeMnNi alloys were investigated. The results show that the sphericity of the pre-alloyed powders decreases with the milling time increasing. The phase composition of as-SPSed alloys presents a single face-centered cubic structure, and the grain size decreases with the increase of ball-to-powder weight ratio and mechanical milling time. Compared with the alloys without mechanical milling, the yield strength of the as-SPSed alloys increases with the increase of mechanical milling energy, which reaches the highest value when the ball-to-powder weight ratio is 7.5:1.0 and the mechanical milling time is 100 h, increasing by about 19%, which is mainly due to the fine grain strengthening. The ultimate tensile strength tends to firstly increase and then decrease, which reaches the highest value when the ball-to-powder weight ratio is 7.5:1.0 and the mechanical milling time is 30 h, increasing by about 12%.
[1] |
Ye J W, Chen S K, Lin S J, et al. Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes. Adv Eng Mater, 2004, 6(5): 299 DOI: 10.1002/adem.200300567
|
[2] |
Zhang Y, Zuo T T, Tang Z, et al. Microstructures and properties of high-entropy alloys. Prog Mater Sci, 2014, 61: 1 DOI: 10.1016/j.pmatsci.2013.10.001
|
[3] |
Vaidya M, Muralikrishna G M, Murty B S, et al. High-entropy alloys by mechanical alloying: a review. J Mater Res, 2019, 34(5): 664 DOI: 10.1557/jmr.2019.37
|
[4] |
Zhang M, Li R D, Yuan T C, et al. Densification and properties of B4C-based ceramics with CrMnFeCoNi high entropy alloy as a sintering aid by spark plasma sintering. Powder Technol, 2019, 343: 58 DOI: 10.1016/j.powtec.2018.11.005
|
[5] |
He F, Wang Z J, Cheng P, et al. Designing eutectic high entropy alloys of CoCrFeNiNb x. J Alloys Compd, 2016, 656: 284 DOI: 10.1016/j.jallcom.2015.09.153
|
[6] |
Yu Y, He F, Qiao Z H, et al. Effects of temperature and microstructure on the tribological properties of CoCrFeNiNb x eutectic high entropy alloys. J Alloys Compd, 2019, 775: 1376 DOI: 10.1016/j.jallcom.2018.10.138
|
[7] |
Joseph J, Haghdadi N, Shamlaye K, et al. The sliding wear behaviour of CoCrFeMnNi and Al xCoCrFeNi high entropy alloys at elevated temperatures. Wear, 2019, 428-429: 32 DOI: 10.1016/j.wear.2019.03.002
|
[8] |
Liu W H, He J Y, Huang H L, et al. Effects of Nb additions on the microstructure and mechanical property of CoCrFeNi high-entropy alloys. Intermetallics, 2015, 60: 1 DOI: 10.1016/j.intermet.2015.01.004
|
[9] |
Park S, Nam H, Na Y, et al. Effect of initial grain size on friction stir weldability for rolled and cast CoCrFeMnNi high-entropy alloys. Met Mater Int, 2020, 26: 641 DOI: 10.1007/s12540-019-00466-1
|
[10] |
Otto F, Dlouhý A, Somsen Ch, et al. The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy. Acta Mater, 2013, 61(15): 5743 DOI: 10.1016/j.actamat.2013.06.018
|
[11] |
吴明明, 李来平, 高选乔, 等. 粉末冶金技术制备钼基复合材料研究进展. 粉末冶金技术, 2021, 39(5): 462
Wu M M, Li L P, Gao X Q, et al. Research progress of molybdenum-based composites prepared by powder metallurgy technology. Powder Metall Technol, 2021, 39(5): 462
|
[12] |
李克峰, 施麒, 毛新华, 等. 金属粉末特性对选区激光熔化工艺及其制件性能影响. 粉末冶金技术, 2022, 40(6): 499
Li K F, Shi Q, Mao X H, et al. Effect of metallic powder properties on selective laser melting technology and component performances. Powder Metall Technol, 2022, 40(6): 499
|
[13] |
Cheng H, Xie Y C, Tang Q H, et al. Microstructure and mechanical properties of FeCoCrNiMn high-entropy alloy produced by mechanical alloying and vacuum hot pressing sintering. Trans Nonferrous Met Soc China, 2018, 28(7): 1360 DOI: 10.1016/S1003-6326(18)64774-0
|
[14] |
Chu C L, Chen W P, Chen Z, et al. Microstructure and mechanical behavior of FeNiCoCr and FeNiCoCrMn high-entropy alloys fabricated by powder metallurgy. Acta Metall Sin, 2021, 34: 445 DOI: 10.1007/s40195-020-01150-9
|
[15] |
Xie Y H, Liang J M, Zhang D L, et al. Sustaining strength-ductility synergy of CoCrFeNiMn high entropy alloy by a multilevel heterogeneity associated with nanoparticles. Scr Mater, 2020, 187: 390 DOI: 10.1016/j.scriptamat.2020.06.054
|
[16] |
Jiang F L, Zhao C C, Liang D S, et al. In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off. Mater Sci Eng A, 2020, 771: 138625 DOI: 10.1016/j.msea.2019.138625
|
[17] |
Meyers M, Chawla K. Mechanical Behavior of Materials. 2nd Ed. New York: Cambridge University Press, 2008
|
[18] |
Praveen S, Basu J, Kashyap S, et al. Exceptional resistance to grain growth in nanocrystalline CoCrFeNi high entropy alloy at high homologous temperatures. J Alloys Compd, 2016, 662: 361 DOI: 10.1016/j.jallcom.2015.12.020
|
[19] |
Heczel A, Kawasaki M, Labar J L, et al. Defect structure and hardness in nanocrystalline CoCrFeMnNi high-entropy alloy processed by high-pressure torsion. J Alloys Compd, 2017, 711: 143 DOI: 10.1016/j.jallcom.2017.03.352
|
[20] |
Stoller R E, Zinkle S J. On the relationship between uniaxial yield strength and resolved shear stress in polycrystalline materials. J Nucl Mater, 2000, 283-287(1): 349
|
[21] |
Sun S J, Tian Y Z, Lin H R, et al. Enhanced strength and ductility of bulk CoCrFeMnNi high entropy alloy having fully recrystallized ultrafine-grained structure. Mater Des, 2017, 133: 122 DOI: 10.1016/j.matdes.2017.07.054
|
[22] |
Smallman R E, Westmacott K H. Stacking faults in face-centred cubic metals and alloys. Philos Mag, 1957, 2: 669 DOI: 10.1080/14786435708242709
|
[23] |
Ungár T, Borbély A. The effect of dislocation contrast on X-ray line broadening: A new approach to line profile analysis. Appl Phys Lett, 1996, 69(21): 3173 DOI: 10.1063/1.117951
|
1. |
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