Preparation and performance of iron-based amorphous strip/AZ31 Mg alloy laminated composites

Abstract

Abstract In this paper, the iron-based amorphous/AZ31 microlaminated composites with multilayer structures were successfully prepared by using the vacuum hot-pressing method. The microstructure and chemical element distribution were analyzed, and the mechanical properties and microhardness were tested. Research findings revealed that a thin iron-aluminum intermetallic compound layer was formed between the iron-based amorphous alloy and AZ31, and the interlayers were tightly bonded. The microhardness of the amorphous after the hot-pressing reaction reached 1590 HV and there was a hardness gradient between the AZ31 layer and the amorphous layer. The bending strength reached 516 MPa after hot-pressing temperature at 520°C and the impact toughness was about 6 J/cm2. The fracture behavior was a combination of brittle fracture and ductile fracture. The microstructure and the properties of the laminated composites can be designed by adjusting the process according to the performance needs, which opens up broad prospects for the wide application of amorphous alloys.