| Abstract Scope |
Development of additive manufacturing technology has broadened drastically the potentials for improving the properties of metallic materials. However, application of additive manufacturing in steels is still limited in high alloys such as stainless and maraging steels.
During typical additive manufacturing processing, materials experience various rapid heating and cooling cycles, resulting in complex microstructure changes, similarly to multi-pass welding. It is known that application of sophisticated thermal cycles is very important in microstructure and properties in high strength steels. In this presentation, fundamentals of thermal cycles in grain refining, alloy partitioning during phase transformation and refining precipitation dispersion in low-alloy steels are briefly introduced and importance of thermal history will be emphasized in application of additive manufacturing to low alloy steels. |