Formation of nanometer embedded phases during high-energy Ti-implanted andannealed steel

Citation
Th. Zhang et al., Formation of nanometer embedded phases during high-energy Ti-implanted andannealed steel, NUCL INST B, 169, 2000, pp. 118-123
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
ISSN journal
0168-583X → ACNP
Volume
169
Year of publication
2000
Pages
118 - 123
Database
ISI
SICI code
0168-583X(200006)169:<118:FONEPD>2.0.ZU;2-E
Abstract
Observation by transmission electron microscope (TEM) indicated the formati on of FeTi2 phase of 3.5-20 nm in diameter embedded in a high-energy Ti-imp lanted layer. The nanometer phases were embedded among dislocations and gra in boundaries in Ti-implanted steel at 400 degrees C. It has good wear resi stance. The embedded structure changes after annealing. The structure chang ed slightly after annealing at temperature ranging from 350 degrees C to 50 0 degrees C, while the hardness of the implanted layer increased greatly. T he maximum of hardness is obtained when the sample was annealed at 500 degr ees C for 20 min and the Ti phases had an average diameter of 8 nm. Disloca tions disappeared and the diameter of nanometer phases increased to 10 and 16 nm after annealing at temperature of 750 degrees C and 1000 degrees C, r espectively. The average densities of the nanometer phases are 8.8 x 10(10) and 6.5 x 10(10) cm(-2), respectively for both annealing temperatures. (C) 2000 Elsevier Science B.V. All rights reserved.