摘要
積層製造(additive manufacturing, AM)技術近年來備受矚目，可以用來快速滿足具足夠強度的功能性產品成型需求，然而，可用來成型金屬產品的選擇性熔融技術(selective laser melting, SLM)，若要達成緻密度的需求，通常僅能侷限於某些最佳參數。雖然能夠達成高強度且均勻的材料特性，但不易針對特定部位任意調控材料的顯微結構及其對應的機械性質。工研院所開發的光引擎技術，可動態調控積層製造製程中凝固溫度歷程，進而改變材料內部的顯微結構及機械性質。光引擎的原理是利用複合光束的概念，透過調整延伸光形的能量分布，動態改變凝固過程的溫度變化，來達到選擇性調控材料特性的目的及最佳的產品需求。雷射積層製造搭配光引擎技術，能讓產品設計不僅符合複雜外型及尺寸精度，更能滿足各部位結構所需最佳的硬度、韌性等機械性質，進而創造更好的使用效能與產品壽命，藉此大幅提升醫療、航太及汽車產業的產品差異化及價值。
並列摘要
Additive manufacturing (AM) has drawn much attention in recent years. It can rapidly produce functional product for design evaluation. However, the cooling rate of a selective laser melting (SLM) production is restricted by a present optimized parameter for a good dense product. The head room for locally manipulating material property in a process is marginal. In this study, we invent an Optical Engine for locally controlling material microstructure in a SLM process. It develops an innovative method to control and adjust thermal history of the solidification process to gain desired material micro-structure and consequently improving the mechanical quality. By using thermal dynamic principles of solidification process, process parameters can be applied locally for specific materials requirement according to designed characteristics. It utilizes a technique of complex laser beam shape of adaptive irradiation profile to permit local control of material characteristics as desired. This technology could be useful for industrial application of medical implant, aerospace and automobile industries.