A team of researchers at the National Institute for Materials Science and Osaka University Graduate School of Engineering in Japan, has successfully demonstrated the fabrication of single crystal nickel with additive manufacturing, and they are hoping it finds applications in aerospace. Single crystal metals are highly prized for applications undergoing high stresses and strains and in high temperature environments such as inside a jet engine. They also crack less during manufacturing. Typically they are manufactured with casting. Traditional turbine blades used to be polycrystalline in nature, meaning that the alloy material consists of random crystals formed as the cast blade cools. The interfaces between these random grains are called the grain boundary, and these are a point of weakness in the microstructure of the material. A solution to this problem was found by carefully guiding the crystal seed growth through geometric features inside the mold to guide the solidifying blade… read more