Abstract
Laser-beam fusion welding processes enable the increase of the size of metallic glass parts, and therefore facilitate the application of this new material in different products. To get exceptional properties of the material after the welding process, characteristics of the weld structure in the heat affected zone and in the fusion zone should be predicted. The main goal of this work is to study the structure and specific characteristics of the Zr55Cu30Ni5Al10 alloy after the casting process and after the laser welding process. Electron microscopy observation confirmed that the amorphous phase was present in the fusion zone and amorphous–crystalline phase was present in the heat-affected zone. Higher nanohardness and reduced Young’s modulus values were demonstrated for laser welds using higher impulse energy (2.78 J) and impulse peak power (1000 W).
Highlights
Current State-of-the-Art Technologies Used in the Joining of Bulk Metallic Glasses
Recent years have seen the intense development of bulk metallic glasses (BMGs)
Tests of nanomechanical properties of selected welds made of Zr-based BMG involved
Summary
Recent years have seen the intense development of bulk metallic glasses (BMGs). Maximum dimensions of manufactured parts reach diameters of tens of millimeters, yet the thickness of homogenous metallic glass is still overly thin for BMGs to find industrial applications. The development of methods enabling the joining of BMGs is the precondition of their industrial application [1,2,3]. Due to a chemical uniformity of their structure BMGs are characterized by a high strength and corrosion resistance. The values of their Young’s modulus are similar to those of their crystalline equivalents, yet they do not show the anisotropy of elastic properties and cannot accommodate a plastic strain. Amorphous materials have a lower electrical conductance than the crystalline alloys with the same chemical composition
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