Manufacturing And Forming Of Amorphous Alloys

Amorphous alloy,also called metallic glass,is a new type of metallic material.At present,many amorphous alloy systems have excellent properties and great application potential.However,due to size limitations and brittleness,practical applications are greatly restricted.If we can enpanded the size of metallic glass to be the same as traditional metal,it will be an ideal metallic material.Aiming at the problem that the brittleness of the amorphous alloy itself makes processing difficult,this paper proposes a method of shear punching of amorphous alloys under high frequency vibrations,which can make amorphous alloy ribbons directly formed by punching.Under the high frequency vibration of the punch,the polymer powder is melted due to frictional heat generation,forming a flexible punch with the steel punch,and flows to the amorphous alloy thin ribbons under the extrusion of the punch,so that the amorphous alloy thin ribbons softening molding.By comparing the XRD(X-ray diffraction)and DSC(differential scanning calorimetry)spectra of the samples before and after the experiment,the amorphous alloy ribbons remained amorphous after the experiment,and the formed shapes were observed under a SEM(scanning electron microscope).The shape of the amorphous alloy ribbons is relatively higher than that of the mold,compared with the mold,the similarity of the shape is more than95%.This method is efficient and low cost,which provides a basis for the wide application of amorphous alloys.In addition,in order to solve the problem of the size limitation of the amorphous alloy itself,in the past few decades,various methods have been tried,including the development of thermodynamic-based alloys,3D printing,and the latest artificial intelligence-led alloy design,which still can not break through the limitation of the decimeter size of amorphous alloy.This paper develops a simple and flexible method for manufacturing GMG(giant metallic glass)by thermoforming.By fully activating the atomic bonds between metallic glass plates at an appropriate temperature,we have obtained La₆₄Al₁₄Cu₂₄ giant metallic glass with a diameter greater than 100 mm,which is 20 times larger than the maximum diameter size(5 mm)of La₆₄Al₁₄Cu₂₄ currently found.Based on this method,complex 3D parts can be manufactured and formed at the same time.By comparing the XRD and DSC patterns,stress-strain curves and microhardness of the samples before and after the experiment,the amorphous state of the samples remains unchanged after the experiment,and the properties of the samples are basically the same as the original samples.Through the FE(finite element)simulation of the bonding mechanism between the interfaces,the simulation results achieved the oxide layer fracture at the interface and the direct bonding of the interface,and the same results were observed under the projection TEM(transmission electron microscope)as the simulation.This method overcomes the size limitation faced by the traditional method,and forming a larger amorphous alloy is of great significance to promote the industrial application of the amorphous alloy.