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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 758, p. 192-201, JUN 5 2019.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 17/17697-5 - Avaliação mecânica e microestrutural de peças fabricadas por manufatura aditiva no aço 18%Ni Maraging 300 com aplicação aeronáutica.
• Beneficiário: Julian Arnaldo Avila Diaz
• Modalidade de apoio: Auxílio à Pesquisa - Regular