Abstract The laser welding experiment of Nb521 niobium-tungsten alloy with 1.0mm thickness was carried out, and the effects different edge preparation states, including fast wire cutting + milling slow no milling, on weld formation were analyzed. results show that weldability is very good. parameters are in a wide range, good can be obtained easily. effect states small, all welded joints broken...

Tungsten-heavy alloys (WHA) are a pseudo-alloy in which tungsten is the primary phase and remains filled with additives such as Ni–Fe Ni–Cu. These widely used to make their applications’ structural, electrical, electronic components. According this study, addition processing factors, prime factors affecting performance of WHAs microstructural features matrix composition, powders shapes sizes, d...

Abstract Self-passivating, so-called smart alloys are under development for a future fusion power plant. These containing tungsten, chromium and yttrium must possess an acceptable plasma performance during regular operation of plant demonstrate the suppression non-desirable oxidation tungsten in case accident. The up-scaling bulk to reactor-relevant sizes has begun first samples with diameter 5...

Ni–Ti shape memory alloys (Nitinol) are suitable for biomedical applications such as orthodontic, orthopedic, and cardiovascular implants. However, to avoid local inflammatory processes, efforts being made functionalize the surface of alloy with bioactive materials. Chitosan-based composite coatings can be applied improve properties due their excellent properties, low toxicity, biocompatibility...

The metallurgical and mechanical properties of Ti6Al4V/(WC-Co) friction welds have ben investigated. The microstructure close to the bondline comprised a mixture of acicular and equiaxed α plus β phases. The diffusion of elements in the welded specimens has been detected. The fracture strengths of Ti6Al4V/(WC-Co) friction welds markedly improved when the cobalt content in the (WC-Co) carbide su...

The metallurgical and mechanical properties of Ti6Al4V/(WC-Co) friction welds have ben investigated. The microstructure close to the bondline comprised a mixture of acicular and equiaxed α plus β phases. The diffusion of elements in the welded specimens has been detected. The fracture strengths of Ti6Al4V/(WC-Co) friction welds markedly improved when the cobalt content in the (WC-Co) carbide su...

Considerable research has been carried out to study the laser welding of magnesium alloys. However, studies are mainly devoted butt welding, and there limited information in published literature concerning bead-on-plate AZ91D, even though is required for repair cast AZ91D parts with surface defects. In present investigation, cracking weld metal was observed when an alloy welded using method. Th...

• First demonstration of a Tungsten-based bcc-superalloy concept comprising bcc b e t -W matrix reinforced by ’ TiFe intermetallic phase. W-Ti-Fe ternary phase equilibria experimentally evaluated and taken in new CALPHAD thermodynamic model to instruct onward computational design future bcc-superalloys. Nano-scale ∼ 50nm precipitation occurs during heat treatment at 1250 ∘ C, which share (001) ...