Microstructure and Properties of FeCoCrNiMn/6061 Al-alloy Matrix Composites

doi:10.11901/1005.3093.2024.330

Chinese Journal of Materials Research

2025, Vol. 39

Issue (5): 353-361 DOI: 10.11901/1005.3093.2024.330

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Microstructure and Properties of FeCoCrNiMn/6061 Al-alloy Matrix Composites

HU Yong(

), LU Shifeng, YANG Tao, PAN Chunwang, LIU Lincheng, ZHAO Longzhi, TANG Yanchuan, LIU Dejia, JIAO Haitao

School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China

Cite this article:

HU Yong, LU Shifeng, YANG Tao, PAN Chunwang, LIU Lincheng, ZHAO Longzhi, TANG Yanchuan, LIU Dejia, JIAO Haitao. Microstructure and Properties of FeCoCrNiMn/6061 Al-alloy Matrix Composites. Chinese Journal of Materials Research, 2025, 39(5): 353-361.

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Abstract

Novel composites of FeCoCrNiMn particle reinforced 6061 Al-alloy matrix (FeCoCrNiMn/6061 Al-alloy)were prepared by vacuum hot-pressing sintering technique. The microstructure of the composites was studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The mechanical properties of the composites were measured by universal testing machine. The results indicate that the interface between FeCoCrNiMn particles and the 6061 Al-alloy matrix is well bonded, with a diffusion layer of approximately 0.5 μm at the interface. With the increase of the volume fraction of FeCoCrNiMn particles, the Brinell hardness, yield strength and tensile strength of the composites increase gradually, while the elongation at break decreases gradually. When the volume fraction of FeCoCrNiMn particles is 20%, the yield strength and tensile strength reach 137.53 MPa and 186.00 MPa, respectively, which are 71.12% and 24.41% higher than 6061 Al-alloy. The strengthening mechanisms of FeCoCrNiMn/6061 Al-alloy matrix composites may mainly be thermal mismatch strengthening, fine-grain strengthening and load transfer strengthening, among which the thermal mismatch strengthening contributes the most.

Key words: composite FeCoCrNiMn particles aluminum matrix composites hot press sintering microstructure mechanical property

Received: 27 July 2024

ZTFLH:

TB331

Fund: National Natural Science Foundation of China(51865011);Natural Science Foundation of Jiangxi Province(20224BAB214048)

Corresponding Authors: HU Yong, Tel: 13576012078, E-mail: huyong@ecjtu.edu.cn

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	Articles by authors
	HU Yong
	LU Shifeng
	YANG Tao
	PAN Chunwang
	LIU Lincheng
	ZHAO Longzhi
	TANG Yanchuan
	LIU Dejia
	JIAO Haitao

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https://www.cjmr.org/EN/10.11901/1005.3093.2024.330 OR https://www.cjmr.org/EN/Y2025/V39/I5/353

Fig.1 Powder morphology of 6061 (a), FeCoCrNiMn (b) and FeCoCrNiMn + 6061 (c)

Volume fraction of FeCoCrNiMn particles	0%	4%	8%	12%	16%	20%
$ρ t$ / g·cm^-3	2.72	2.935	3.15	3.366	3.581	3.796
$ρ a$ / g·cm^-3	2.677	2.881	3.076	3.284	3.471	3.669

Table 1 Actual and theoretical densities of FeCoCrNiMn/6061 aluminum matrix composites

Fig.2 Relative density of FeCoCrNiMn /6061 aluminum matrix composites

Fig.3 Microstructures of FeCoCrNiMn /6061 aluminum matrix composites
(a) 0%, (b) 4%, (c) 8%, (d) 12%, (e) 16%, (f) 20%

Fig.4 Grain size distribution of FeCoCrNiMn/6061 aluminum matrix composites
(a) 0%, (b) 4%, (c) 8%, (d) 12%, (e) 16%, (f) 20%

Fig.5 XRD patterns of 6061 aluminum alloy and FeCoCrNiMn/6061 aluminum matrix composites with 12% 6061 aluminum alloy

Fig.6 EDS element analysis of FeCoCrNiMn/6061 Al matrix composites

Fig.7 EDS line scanning analysis of the interface layer of FeCoCrNiMn/6061 Al matrix composites

Fig.8 Brinell hardness of FeCoCrNiMn/6061 aluminum matrix composites

Fig.9 Tensile stress-strain curves of FeCoCrNiMn/6061 aluminum matrix composites

Fig.10 Tensile fracture morphologies of FeCoCrNiMn/6061 aluminum matrix composites
(a) 0%, (b) 4%, (c) 8%, (d) 12%, (e) 16% and (f) 20%

Fig.11 Contribution of various strengthening mechanisms to the yield strength of FeCoCrNiMn/6061 aluminum matrix composites

Fig.12 Prediction curve and experimental value of yield strength of FeCoCrNiMn/6061 aluminum matrix composites

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