Recent developments in metal additive manufacturing

Additive manufacturing (AM) or 3D printing has revolutionized the modern metal manufacturing industry. AM technology allows for fabrication of highly customized 3D objects where both shape and composition can be tailored. Compared to traditional methods, metal AM technology has advantages in saving time and cost. Recent developments in metal AM systems include upgrades in energy source and part resolution, which leads to better part quality and improved reliability. This brief review article summarizes recent developments in metal AM technologies as well as the current challenges and future trends.