Predicting Thermal History, Microstructure and Hardness of Wire Arc Additive Manufactured Parts

Wire Arc Additive Manufacturing (WAAM) is a manufacturing technique with the ability to produce large metal parts with relatively complex geometrical shapes. One obstacle limiting full exploitation of WAAM in the industry is uncertainty on the mechanical properties of manufactured parts. Mechanical properties are strongly influenced by the...

The Backbone of the Metropolis: How the development of rapid transit determined the becoming of the New York City Metropolis

The Rapid Transit system in New York City, with its underground and elevated railroads, has clearly been a very important factor in the development of the New York City metropolis as we know it today. Not solely as a means of transportation through the vast amount of land that is covered by the city, but also as a means of development for the...