Precipitation in a novel maraging steel F1E: A study of austenitization and aging using small angle neutron scattering

V. Gray*, D. Galvin, L. Sun, E. P. Gilbert, T. Martin, P. Hill, M. Rawson, K. Perkins

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

8 Citations (Scopus)
296 Downloads (Pure)

Abstract

The effect of austenitization temperature, aging temperature, and, aging time on the development of precipitates in a novel maraging steel known as F1E was investigated. The investigation primarily employed small angle neutron scattering (SANS) coupled with thermal calculations, atom probe tomography (APT) and electron microscopy (SEM, STEM, TEM). This large scale study investigated austenitization temperatures of 825, 870 and 960 °C with aging of 0, 1, 2.5, 5, 7.5, 10 and 24 h conducted at 540 °C. For austenitization at 960 °C, aging at 520 °C and 560 °C was also conducted for the same aging times. This yielded 32 conditions where the size, shape and volume fraction of three different precipitates were determined, namely a pre-existing laves phase, a developing laves phase, and a developing β phase. Also observed in this study was a significant change in microstructure of the pre-existing laves precipitate as a result of aging time.

Original languageEnglish
Pages (from-to)270-281
Number of pages12
JournalMaterials Characterization
Volume129
Early online date5 May 2017
DOIs
Publication statusPublished - 1 Jul 2017

Keywords

  • Aging
  • Maraging
  • Precipitation
  • SANS
  • Steel

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