ICME-W Scientific, technological and economic challenges for metal AM

3D printing is now widely used in aerospace, healthcare, energy, automotive and other industries, and metal printing is the fastest growing sector. A commentary article published in Nature Materials, which was led by Prof. T. DebRoy of the Pennsylvania State University and coauthored by Prof. W. Zhang and others, discusses in detail the scientific, technological and economic challenges that must be understood and addressed for further development of metal printing.