Wire arc directed energy deposition (WDED) is a robust alternative for large-scale metal printing. It offers high deposition rates, excellent material and energy efficiency, and reduced waste material compared to conventional manufacturing processes. This article describes a study that employed a combination of standard and advanced characterization techniques to assess the mechanical behavior of WDED titanium samples. This entry won first place in the light microscopy category of the prestigious 2023 International Metallographic Contest.

Titanium boron composite coatings with superior wear performance were selected for use in materials experiments on the International Space Station. The titanium-boron nitride composite coatings were prepared using an atmospheric plasma spray technique from engineered composite powders. The coatings were subjected to extensive characterization and tribological studies. The results show tremendous improvement in the wear performance.

Efforts are underway in every sector of the scientific community to explore and develop possible strategies and solutions to counter sea level rise and climate change. This article discusses long-term approaches including various methodologies to convert CO 2 greenhouse gas released from burning fossil fuels to other forms of fuel and value-added products, thus mitigating climate change and its associated effects, including sea level rise.

Efforts are underway in every sector of the scientic community to explore and develop possible strategies and solutions to counter sea level rise and climate change. Near-term materials science implications include improvements to corrosion-resistant materials and coatings.

Nano-scratch testing can be tailored to quantify the adhesion strength of small-scale surface formations, deposits, and structures on a wide range of materials. This article describes the basic measurement technique and presents examples showing how it has been used to evaluate the bonding characteristics of plasma-sprayed Al 2 O 3 splats on steel, osteoblast cells on hydroxyapatite-based coatings, and carbon nanotubes on copper and silicon substrates.