Research on mechanical properties of multi-component iron-based amorphous composite

Abstract

Abstract: Fe-15Mn-5Si-10Cr-xC(x=0.6~1.0) amorphous alloy composites were prepared by vacuum magnetic levitation melting water-cooled copper crucible negative pressure copper mold suction casting method. The thermodynamic parameters of Fe-15Mn-5Si-10Cr-xC(x=0.6~1.0) alloy was adjusted by changing the content of C element. And the microstructure and mechanical properties of the alloys were studied. The results show that adding the C elements, the atom size difference δ increases, the mixing entropy ΔS_mix improves while the mixing enthalpy ΔH_mix reduces. The as cast microstructure of the alloy is composed of amorphous phase and undercooled γ-Fe austenite phase. Martensitic transformation occurs and work hardening is obvious during compressive stress loading. The ΔS_mix and ΔH_mix of the Fe-15Mn-5Si-10Cr-0.9C alloy are 1.13RJ·mol^－1·K^－1and －19.6 kJ·mol^－1, respectively. And the compressive yield strength, fracture strength and the plastic strain are up to 1 300, 2 378 MPa and 17.2%.

Key words: amorphous composite, thermodynamic parameter, microstructure, mechanical properties

CLC Number:

TG139.8

ZHAO Yan-chun, LI Ze-feng, WANG Bo, KOU Sheng-zhong, LI Wen-sheng. Research on mechanical properties of multi-component iron-based amorphous composite[J]. Journal of Lanzhou University of Technology, 2021, 47(6): 1-5.

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