Guillermo Requena

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Cast nickel aluminum bronze (NAB) alloy is widely used for large engineering components in marine applications due to its excellent mechanical properties and corrosion resistance. Casting porosity, as well as coarse microstructure, however, are accompanied by a decrease in mechanical properties of cast NAB components. Although heat treatment, friction stir(More)
Advanced manufacturing encompasses the wide range of processes that consist of " 3D printing " of metallic materials. One such method is Electron Beam Melting (EBM), a modern build technology that offers significant potential for lean manufacture and a capability to produce fully dense near-net shaped components. However, the manufacture of intricate(More)
To increase building rate and save cost, the selective laser melting (SLM) of Ti6Al4V with a high layer thickness (200 µm) and low cost coarse powders (53 µm–106 µm) at a laser power of 400 W is investigated in this preliminary study. A relatively large laser beam with a diameter of 200 µm is utilized to produce a stable melt pool at high layer thickness,(More)
Wire arc additive manufacturing (WAAM) offers a potential approach to fabricate large-scale magnesium alloy components with low cost and high efficiency, although this topic is yet to be reported in literature. In this study, WAAM is preliminarily applied to fabricate AZ31 magnesium. Fully dense AZ31 magnesium alloy components are successfully obtained.(More)
Copper alloys, combined with selective laser melting (SLM) technology, have attracted increasing attention in aerospace engineering, automobile, and medical fields. However, there are some difficulties in SLM forming owing to low laser absorption and excellent thermal conductivity. It is, therefore, necessary to explore a copper alloy in SLM. In this(More)