|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Mechanical, Corrosion Properties and Industrial Application of CoCrFeNiTi-based Multiprincipal Element Alloys Achieved by a Combination of Additive Manufacturing and Heat Treatment
||Tadashi Fujieda, Hiroki Sugawara, Toshimi Miyagi, Yuzo Daigo, Kousuke Kuwabara, Hiroshi Shiratori
|On-Site Speaker (Planned)
CoCrFeNiTi-based multiprincipal element alloys (MPEAs) are proposed to meet the demands of high mechanical strength and corrosion resistance in additively manufactured products. First, the effectiveness of applying L-PBF to this MPEA was compared with that of using EB-PBF. The higher solidification rate during L-PBF promoted a fine uniform microstructure with no coarse precipitates, which led to superior tensile properties and a higher pitting potential in comparison to the EB-PBF specimens. In addition, the ultimate tensile strength of the L-PBF specimens increased over 1500 MPa and the corrosion rates in boiling 10% H2SO4 decreased to less than 1mm year by the microstructure control in the solution and aging heat treatments. Furthermore, the higher cobalt and chromium content of the proposed CoCrFeNiTi-based MPEA demonstrated their effectiveness in retarding acid corrosion. We will also report the applicability of the die steel coated this MPEA by L-DED to the hot forging mold.
||Planned: Metallurgical and Materials Transactions