Oxide layer characterization by XRD and Rietveld refinements in maraging steel 300 aged in steam atmosphere

Authors

  • Vanessa Sanches Pereira da Silva AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.
  • José Roberto Ferreira Neto AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.
  • Silvia Lucas Ferreira da Silva AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.
  • Diogo Costa de Oliveira AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.
  • Fábio de Camargo AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.

DOI:

https://doi.org/10.15392/bjrs.v9i1A.1573

Keywords:

Maraging Steel, X-ray Diffraction, Rietveld Method

Abstract

Maraging steels are martensitic steels hardened by precipitation of intermetallic compounds in thermal aging, with good machining properties and high strength, fracture toughness and corrosion resistance, being used in aircraft parts and rocket motor-case, tooling applications and nuclear plants. During thermal aging in steam atmosphere a protective and corrosion resistant oxide layer is formed over the bulk. In this work, conventional Bragg-Brentano geometry was used to identify the phases formed in four specimens of maraging steel grade 300 with different surface finishes that were previously solution annealed twice at (950 ± 5) °C for 1 h, air-cooled, and submitted to oxidation process under positive pressure about 1.5 kPa of steam at (480 ± 5) °C for 6 h, followed by forced air-cooling. Diffraction patterns were measured employing CuKα radiation, ranging 20º < 2θ < 85º and the Rietveld method was used to better characterize the structures identified. Through Rietveld refinements it was possible to conclude that the layer formed during heat treatment process is constituted by a transition metallic phase with a quasi-cubic face centered unit cell, and an oxide layer that includes hematite, magnetite and a spinel structure type MFe2O4, where M could be an alloying element, for all analyzed samples. 

Downloads

Download data is not yet available.

Author Biographies

Vanessa Sanches Pereira da Silva, AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.

Laboratório de Degradação de Materiais (LADEM)

José Roberto Ferreira Neto, AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.

Laboratório de Degradação de Materiais (LADEM)

Silvia Lucas Ferreira da Silva, AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.

Laboratório de Degradação de Materiais (LADEM)

Diogo Costa de Oliveira, AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.

Laboratório de Degradação de Materiais (LADEM)

Fábio de Camargo, AMAZUL – Amazônia Azul Tecnologias de Defesa S.A.

Laboratório de Degradação de Materiais (LADEM)

References

TEWARI R. ; MAZUMDER S. ; BATRA I. ; DEY G. ; BANERJEE S. Precipitation in 18 wt% Ni maraging steel of grade 350. Acta Materialia, v. 48, p. 1187-1200, 2000.

REZEK J. ; KLEIN I. E. ; YAHALOM J. Structure and corrosion resistance of oxides grown on maraging steel in steam at elevated temperatures. Applied Surface Science, v. 108, p. 159 165, 1997.

SHA W. ; GUO Z. Maraging Steels: Modelling of Microstructure, Properties and Applications, 1st ed., New York: Woodhead Publishing Limited, 2009.

MAGNEE A. ; DRAPIER J. M. ; COUTSOURADIS D. ; HABRAKAN L. ; DUMONT J. Cobalt-containing high-strength steels. Centre D'information Du Cobalt, Brussels, 1974.

QUADAKKERS W. J. ; ENNIS P. J. ; ZUREK J. ; MICHALIK M. Steam oxidation of ferritic steels - laboratory test kinetic data. Materials at High Temperatures, v. 22, p. 47-60, 2005.

ENNIS P. J. ; QUADAKKERS W. J. Mechanisms of steam oxidation in high strength martensitic steels. International Journal of Pressure Vessels and Piping, v. 84, p. 75-81, 2007.

SUZUKI S. ; KAKITA K. A Comparative Study of GDOES, SIMS and XPS Depth Profiling of Thin Layers on Metallic Materials. Journal of Surface Analysis, v. 12, p. 174-177, 2005.

RIETVELD H. M. Line profiles of neutron powder-diffraction peaks for structure refinement. Acta Crystallographica, v. 22, p. 151-152, 1967.

RIETVELD H. M. A profile refinement method for nuclear and magnetic structures. Journal of Applied Crystallography, v. 2, p. 65-71, 1969.

CPD - Commission on Powder Diffraction; IUCr - International Union of Crystallography. Rietveld Refinament from Powder Diffractin Data, n. 26, 2001.

WILL G. Powder Diffraction: The Rietveld Method and Two-Stage Method, 1st ed., Berlin: Springer, 2006.

KLEIN, I.E. ; YANIV, A.E. ; SHARON, J. The Oxidation Mechanism of Fe-Ni-Co Alloys. Oxidation of Metals, v. 16, p. 99-106, 1981.

TAGLIENT, M. A. ; PENZA M. ; GUSSO M. ; QUIRINI A. Characterisation of ZnS:Mn thin films by Rietveld refinement of Bragg-Brentano X-ray diffraction patterns. Thin Solid Films, v. 353, p. 129-136, 1999.

NUNES G. C. S.; SARVEZUK P. W. C.; BIONDO V.; BLANCO M. C.; NUNES M. V. S. Structural and magnetic characterization of martensitic Maraging-350. Journal of Alloys and Compounds, v. 646, p. 321-325, 2015.

NUNES G. C. S.; SARVEZUK P. W. C.; ALVES T. J. B.; BIONDO V.; IVASHITA F.; PAESANO JR. A. Maraging-350 steel: Following the aging through diffractometric, magnetic and hyperfine analysis. Journal of Magnetism and Magnetic Materials, v. 421, p. 457-461, 2017.

ALVES T. J. B.; NUNES G. C. S.; TUPAN L. F. S.; SARVEZUK P. W. C.; IVASHITA F. F.; OLIVEIRA C. A. S.; PAESANO JR. A. Aging-Induced Transformations of maraging-400 Alloys. Metallurgical and Materials Transactions A, v. 49, p. 3441–3449, 2018.

TOBY B. H. R factors in Rietveld analysis: How good is good enough? Powder Diffraction, v. 21, p. 67-70, 2006.

Downloads

Published

2021-04-30

How to Cite

Silva, V. S. P. da, Neto, J. R. F., Silva, S. L. F. da, Oliveira, D. C. de, & Camargo, F. de. (2021). Oxide layer characterization by XRD and Rietveld refinements in maraging steel 300 aged in steam atmosphere. Brazilian Journal of Radiation Sciences, 9(1A). https://doi.org/10.15392/bjrs.v9i1A.1573

Issue

Section

The Meeting on Nuclear Applications (ENAN) 2019

Most read articles by the same author(s)