Gas turbine engine advancements have been enabled by innovation in materials and manufacturing technologies. The evolution of additive manufacturing (AM) has changed the face of direct digital technologies for the rapid production of models, prototypes, and functional parts including repair and maintenance for turbine engines. Metal 3D printing is poised to be an enabler for the next industrial revolution in enabling advancements in turbine engine performance. While there has been tremendous efforts on research and development in utilizing this versatile technology, the number of qualified metallic parts that are running in the engine has not been commensurate with the applied research and development efforts and the benefits that the AM technology offers. This review addresses some of the key technical issues that are currently limiting the prolific usage of AM as a successful vehicle for accelerated progress in gas turbine engines.

材料和制造技术的创新推动了燃气涡轮发动机的发展。增材制造（AM）的发展改变了直接数字技术的面貌，以快速生产模型，原型和功能部件，包括涡轮发动机的维修和保养。金属3D打印有望推动下一次工业革命，从而推动涡轮发动机性能的提高。尽管在利用这种通用技术方面进行了大量的研究和开发工作，但发动机中运行的合格金属零件的数量与应用的研究开发工作以及AM技术所带来的好处并不相称。