학술논문
Strong and ductile reduced activation ferritic/martensitic steel additively manufactured by selective laser melting
Document Type
article
Author
Source
Materials Research Letters, Vol 7, Iss 10, Pp 426-432 (2019)
Subject
Language
English
ISSN
2166-3831
21663831
21663831
Abstract
Selective laser melting (SLM) was successfully applied to fabricate strong and ductile reduced activation ferritic/martensitic (RAFM) steel by introducing heterogeneous multi-/bimodal microstructure. The SLM-built RAFM steel exhibited an excellent combination of strength and ductility (i.e. yield strength of 1053 ± 4.7 MPa and elongation of 16.9 ± 0.4%), well surpassing the previously reported counterparts. The superior strength was expected from the refined grains and lath martensites, and the high ductility was associated with the improved dislocation-controlled strain hardening capability. This work provides a basis for developing high-performance RAFM steel by microstructural design via SLM.