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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of thermal cycling and aging stages on the microstructure and bending strength of a selective laser melted 300-grade maraging steel

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Author(s):
Conde, F. F. [1] ; Escobar, J. D. [2] ; Oliveira, J. P. [3] ; Beres, M. [4] ; Jardini, A. L. [4] ; Bose, W. W. [1] ; Avila, J. A. [5]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Dept Mat Engn, Av Joao Dagnone, 1100 Jd Sta Angelina, BR-13563120 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Met & Mat Engn, SP 10, Av Prof Mello Moraes 2463, BR-05508030 Sao Paulo, SP - Brazil
[3] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Engn Mecan & Ind, UNIDEMI, P-2829516 Caparica - Portugal
[4] Univ Estadual Campinas, Fac Chem Engn, Natl Inst Biofabricat BIOFABRIS, Av Albert Einstein 500, BR-13083852 Campinas, SP - Brazil
[5] Sao Paulo State Univ, UNESP, Campus Sao Joao Boa Vista, BR-13876750 Sao Joao Da Boa Vista, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 758, p. 192-201, JUN 5 2019.
Web of Science Citations: 1
Abstract

Additive manufacturing techniques allow the creation of complex parts in a layer by layer fashion, bringing new opportunities in terms of applications and properties when compared to conventional manufacturing processes. Among other ultra-high-strength steels, the 18 Ni maraging 300 steel offers a good toughness/strength ratio. However, when fabricated by additive manufacturing, this steel presents lower ductility and strain-hardening than its forging counterparts. One way to enhance ductility and toughness is to promote martensite-to-austenite reversion. Therefore, in the present study, 18 Ni maraging steel powder was processed by selective laser melting and different heat treatments were applied to the built parts, aiming for homogenization, microstructural refinement and martensite-to-austenite reversion. Thermodynamic simulations were used to assess a range of temperatures for the reversion heat treatments. Microstructural characterization was performed by scanning electron microscopy, electron backscattered diffraction and x-ray diffraction. (AU)

FAPESP's process: 17/17697-5 - Mechanical and microstructural assessment of additive manufacturing parts made up of 18%Ni Maraging 300 steel towards aeronautic application.
Grantee:Julian Arnaldo Avila Diaz
Support Opportunities: Regular Research Grants