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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 Combined Tempering and Aging in the Austenite Reversion, Precipitation, and Tensile Properties of an Additively Manufactured Maraging 300 Steel

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Conde, Fabio Faria [1] ; Escobar, Julian David [2] ; Rodriguez, Johnnatan [3] ; Afonso, Conrado Ramos Moreira [4] ; Oliveira, Marcelo Falcao [1] ; Avila, Julian Arnaldo [5, 6]
Total Authors: 6
[1] Univ Sao Paulo, Dept Mat Engn, Av Joao Dagnone, 1100 Jd Sta Angelina, BR-13563120 Sao Carlos - Brazil
[2] Univ Sao Paulo, Met & Mat Engn Dept, 10 Av Prof Mello Moraes 2463, BR-05508030 Sao Paulo, SP - Brazil
[3] EIA Univ, Km 2 200 Via Aeropuerto Jose Maria Cordova, Envigado 055428, Antioquia - Colombia
[4] Fed Univ Sao Carlos UFSCar, Grad Program Mat Sci & Engn, PPG CEM, BR-13565905 Sao Carlos, SP - Brazil
[5] Sao Paulo State Univ UNESP, Campus Sao Joao Boa Vista, Av Prof Isette Correa F, BR-13876750 Sao Joao Da Boa Vista, SP - Brazil
[6] Univ Autonoma Occidente, 2, Calle 25, Via Cali Puerto Tejada 115-8 Km 2, Cali, Valle Del Cauca - Colombia
Total Affiliations: 6
Document type: Journal article
Source: Journal of Materials Engineering and Performance; v. 30, n. 7, SI, p. 4925-4936, JUL 2021.
Web of Science Citations: 0

Maraging 300 is an ultrahigh strength steel with significant alloy addition, resulting in a martensitic matrix hardened by precipitation through aging treatment. In these steels, intercritical tempering can provide reverted austenite and precipitation of intermetallic products, increasing the ductility of additively manufactured parts due to austenite presence. Studies deal with postprocessing of additive manufactured parts of maraging steel; however, few focused on phases evolution during the heat treatments and their mechanical response. In the present work, a maraging 300 steel processed by laser-based powder-bed fusion was studied with a focus on microstructural and mechanical properties after applying several postprocessing heat treatments. Tensile tests assessed the mechanical properties, and the microstructure was analyzed by scanning and transmission electron microscopy. A synchrotron beamline with x-ray diffraction was used to conduct in situ measurements of martensite and austenite evolution. The in situ phase evolution revealed that isothermal heat treatments were efficient in promoting martensite-to-austenite reversion. Likewise, the presence of austenite significantly enhanced the ductility, however, at some mechanical strength expense. (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 type: Regular Research Grants
FAPESP's process: 19/00691-0 - Microstructural assessment of additive manufacturing parts towards aeronautic application
Grantee:Julian Arnaldo Avila Diaz
Support type: Regular Research Grants