Wire and arc additive manufacturing of a CoCrFeMoNiV complex concentrated alloy using metal-cored wire: process, properties, and Wear Resistance

The field of complex concentrated alloys offers a very large number of variations in alloy composition. The achievable range of properties varies greatly within these variants. The experimental determination of the properties is in many cases laborious. In this work, the possibility of using metal-cored wires to produce sufficient large samples for the determination of the properties using arc-based additive manufacturing or in detail wire and arc additive manufacturing (WAAM) is to be demonstrated by giving an example. In the example, a cored wire is used for the production of a CoCrFeNiMo alloy. In addition to the process parameters used for the additive manufacturing, the mechanical properties of the alloy produced in this way are presented and related to the properties of a cast sample with a similar chemical composition. The Characterization of the resulting microstructure and wear resistance will complete this work. It will be shown that it is possible to create additively manufactured structures for a microstructure and a property determination by using metal-cored filler wires in arc-based additive manufacturing. In this case, the additively manufactured structure shows an FCC two-phased microstructure, a yield strength of 534 MPa, and a decent wear resistance

High temperature particle jet erosion of nickel- and cobalt-based alloys

Higher operating temperatures can increase the effectiveness of different technical processes, e.g. turbines, combustion furnaces and cyclone separators. The combination of the increasedtemperatures with the stresses and strains necessitate new hardwearing materials. Theresearch of the influence of high temperatures and oxidation on the wear resistance hasmainly been conducted on single-phase materials. In the current research, the influences of temperature, impact angle and kinetic energy of theparticles are examined. Therefore, high temperature particle jet erosion tests of a nickel-basedand a cobalt-based alloy were conducted. Hastealloy® C22 and Ultimet® Alloy were chosen,due to the high resistances against both corrosion and abrasion. The specimens are PTA-welded layers on steel plates, partially reinforced with different carbides, including fusedtungsten carbides and titanium carbides. Initially, only carbides of the same grain size wereused. Further tests were conducted on alloys with a mixture of carbides, varying in type andsize. These tests were conducted in a specially designed testing machine with a variety ofparameters. This includes temperatures of 750 °C, different particle velocities and impactangles. Oxidation tests were used to isolate the influence of the corrosion on the wearresistance at high temperatures. The results of this research provide a better understanding of the properties and capabilities ofthe alloys and carbides

Wire and Arc Additive Manufacturing of a CoCrFeMoNiV Complex Concentrated Alloy Using Metal-Cored Wire—Process, Properties, and Wear Resistance

The field of complex concentrated alloys offers a very large number of variations in alloy composition. The achievable range of properties varies greatly within these variants. The experimental determination of the properties is in many cases laborious. In this work, the possibility of using metal-cored wires to produce sufficient large samples for the determination of the properties using arc-based additive manufacturing or in detail wire and arc additive manufacturing (WAAM) is to be demonstrated by giving an example. In the example, a cored wire is used for the production of a CoCrFeNiMo alloy. In addition to the process parameters used for the additive manufacturing, the mechanical properties of the alloy produced in this way are presented and related to the properties of a cast sample with a similar chemical composition. The characterization of the resulting microstructure and wear resistance will complete this work. It will be shown that it is possible to create additively manufactured structures for a microstructure and a property determination by using metal-cored filler wires in arc-based additive manufacturing. In this case, the additively manufactured structure shows an FCC two-phased microstructure, a yield strength of 534 MPa, and a decent wear resistance