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Processing of Ti-13Nb-13Zr powder by selective laser melting under a relatively high oxygen atmosphere

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Author(s):
Sallica-Leva, E. ; Fogagnolo, J. B. ; Falca, R. B. ; Neto, J. B. Ferreira ; Dos Santos, C. T. ; Bayerlein, D. L. ; Landgraf, F. J. G.
Total Authors: 7
Document type: Journal article
Source: JOURNAL OF MANUFACTURING PROCESSES; v. 79, p. 11-pg., 2022-07-01.
Abstract

Ti-13Nb-13Zr (TNZ) parts were produced by selective laser melting under an atmosphere with a relatively high O content using a comprehensive combination of laser powers and laser beam scanning velocities. The influence of processing conditions on the density, microstructure, interstitial element contents (N and O), and hardness of as-printed TNZ parts were studied. The N and O contents in the TNZ parts increased on increasing the energy density (ED). Despite the high O content in the chamber during laser processing, it was possible to obtain TNZ parts with high density and relatively low N and O contents, depending on the ED applied. Two different types of microstructure were observed in the TNZ parts: alpha ' martensite and alpha/alpha ' + beta phases. Depending on its microstructure, the TNZ parts presented interstitial solid solution hardening and second phase hardening. (AU)

FAPESP's process: 17/20877-5 - Effect of laser selective fusion process parameters on Ti-13% Nb-13% Zr and Nb-47% Ti alloys microstructure
Grantee:Edwin Sallica Leva
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/50199-6 - Nb-Ti and Ti-Nb-Zr orthopaedic prosthesis obtained through selective laser melting
Grantee:Fernando Jose Gomes Landgraf
Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE
FAPESP's process: 17/20926-6 - Study of hydride, milling and dehydration of Ti-13%Nb-13%Zr and Nb-47%Ti alloys
Grantee:Railson Bolsoni Falcão
Support Opportunities: Scholarships in Brazil - Post-Doctoral