콘텐츠 본문
논문 국내 국제전문학술지(SCI급) Additive manufacturing of a shift block via laser powder bed fusion the simultaneous utilisation of optimised topology and a lattice structure
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-09
- 저자명 Sang Hoon KimORCID Icon,Si-Mo Yeon,Jae Hyang Lee,Young Won Kim,Hyub Lee,Jiyong Park,Nak-Kyu Lee,Joon Phil Choi,Clodualdo Aranas Jr.,Yong Jin Lee,Seouk An,Kyunsuk Choi &Yong Son*
- 발행처명 VIRTUAL AND PHYSICAL PROTOTYPING
- 발행국가 국내
- 논문언어 외국어
논문 초록 (Abstract)
The precise shape of a shift block support for the turbine blade of a hovercraft was additively manufactured using 17–4 precipitation-hardened stainless steel (STS 630) powder through laser powder bed fusion (LPBF). Subsequently, heat treatment under the H900 condition increased the yield strength and fracture strain of the shift block to 1313 MPa and 11.5%, respectively, and enhanced its corrosion resistance to seawater. This improvement in mechanical and physical properties is primarily because Cu precipitates were uniformly distributed at the interfacial boundaries along with the simultaneous suppression of the formation of Cr23C6 precipitates with weak corrosion resistance. Furthermore, this was attributed to the phase transformation from the as-built STS 630 comprising a mixture of austenite, ferrite, and martensite to a dual mixture of ferrite and martensite after the heat treatment. Thereafter, we topologically optimised the shift block and adopted a lattice structure to apply the design for additive manufacturing (DfAM).
