碳对无Co高熵合金Fe40Mn30Ni10Cr10Al10组织以及力学性能的影响

doi:10.11896/cldb.20050196

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Abstract Fe₄₀Mn₃₀Ni₁₀Cr₁₀Al₁₀ high-entropy alloy was successfully prepared by vacuum arc melting, and 5at% carbon was added. The effect of carbon on phase constituents, microstructure and mechanical properties of the Fe₄₀Mn₃₀Ni₁₀Cr₁₀Al₁₀ high-entropy alloy was studied systematically. It was found that Fe₄₀Mn₃₀Ni₁₀Cr₁₀Al₁₀ high-entropy alloy was composed of FCC phase, BCC phase and B2 nano-particles, and B2 nano-particles embedded in BCC phase. Addition 5at% carbon to Fe₄₀Mn₃₀Ni₁₀Cr₁₀Al₁₀ high-entropy alloy, BCC phase and B2 nano-particles transformed into FCC phase, and a large amount of M₇C₃ carbide appeared along grain boundaries. Due to the addition of carbon, the elongation of the alloys increased from 18% to 26%, while the tensile strength of the alloy changed little, which was kept at about 730 MPa.

Key words： high-entropy alloy carbon atom phase constituents microstructures mechanical properties

Published: 02 September 2020

CLC number:

TG113

Fund:National Natural Science Foundation Youth Fund of China (51901167), Basic Research Plan of the Department of Science and Technology of Shaanxi Province (2019JQ-421)

About author:: Bai Li received her M.E. degree in material processing engineering from College of Materials Science and Engineering, Chongqing University in 2010. She is currently pursuing her Ph.D. degree at the Xi'an Technological University under the supervision of Prof. Jian Chen and Yukun Lyu. Her research has focused on composition design and strengthening and toughening of high-entropy alloys.
Yukun Lyu received his Ph.D. degree in polymer chemistry and physics from College of Materials Science and Engineering, Chongqing University in 2013. He is currently an associate professor in Xi'an Technological University. His research interests are high-entropy alloy, earthquake-resistant steel and fatigue properties and new aluminum-magnesium alloy.

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	BAI Li
	WANG Yuzhe
	LYU Yukun
	YAN Yi
	FU Meiwen

Cite this article:

BAI Li,WANG Yuzhe,LYU Yukun, et al. Effect of Carbon on Microstructures and Mechanical Properties of Co-free Fe₄₀Mn₃₀Ni₁₀Cr₁₀Al₁₀ High-entropy Alloy[J]. Materials Reports, 2020, 34(17): 17072-17076.

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http://www.mater-rep.com/EN/10.11896/cldb.20050196 OR http://www.mater-rep.com/EN/Y2020/V34/I17/17072

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