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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.)

Thermomechanical controlled processing to achieve very fine grains in the ISO 5832-9 austenitic stainless steel biomaterial

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Author(s):
dos Reis Silva, Mariana Beatriz ; Maria Cabrera, Jose ; Balancin, Oscar ; Jorge, Jr., Alberto Moreira
Total Authors: 4
Document type: Journal article
Source: MATERIALS CHARACTERIZATION; v. 127, p. 153-160, MAY 2017.
Web of Science Citations: 2
Abstract

Simulations of thermomechanical processing of a high niobium- and nitrogen-bearing austenitic stainless steel for orthopedic implants (ISO 5832-9) were conducted using hot torsion test with multiple deformations under continuous cooling conditions. Samples were reheated to 1250 degrees C and subjected to deformation schedules with pass strain of 0.3, strain rate of 1 s(-1) and interpass times of 5, 20 and 50 s. Optical microscopy, TEM, EDS and EBSD were used to characterize the samples. Characterization of precipitates indicated that only TiNbN was undissolved after soaking, while Z-phase and NbN precipitated during on cooling deformation schedules. The evolution of grain and precipitate sizes with deformation conditions were studied and related to both grain refinement, and mechanical behavior observed. The critical grain size limited by precipitates was calculated using the values obtained for size and volume fraction of precipitates. Differences observed between calculated and measured values were discussed. (C) 2017 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 09/10919-6 - Microstructural evolution during hot forging of the ISO 5832-9 stainless steel used in Orthopedical Implants - A technological approach.
Grantee:Alberto Moreira Jorge Junior
Support Opportunities: Regular Research Grants