Atom Probe Tomography I. Early Stages of Precipitation of NbC and NbN in Ferritic Steels

ABSTRACTAtom probe tomography is used to investigate the clustering of Y-Ti-O in a 14%Cr-2%W-0.3%Ti & 0.3% Y2O3 ODS steel. The clusters in the consolidated material are compared to clusters observed in the powder prior to consolidation. A higher density of smaller clusters is observed in the powder, and the clusters are found to contain more O and less Y.

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Quantitative analyses of early stages of phase transformation by atom probe tomography

Microscopy and Microanalysis ◽

10.1017/s1431927608084730 ◽

2008 ◽

Vol 14 (S2) ◽

pp. 88-89

Author(s):

EA Marquis

Keyword(s):

Phase Transformation ◽

New Mexico ◽

Atom Probe Tomography ◽

Atom Probe ◽

Early Stages ◽

Quantitative Analyses

Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008

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Analysis of strengthening in AA6111 during the early stages of aging: Atom probe tomography and yield stress modelling

Acta Materialia ◽

10.1016/j.actamat.2013.08.033 ◽

2013 ◽

Vol 61 (19) ◽

pp. 7285-7303 ◽

Cited By ~ 88

Author(s):

R.K.W. Marceau ◽

A. de Vaucorbeil ◽

G. Sha ◽

S.P. Ringer ◽

W.J. Poole

Keyword(s):

Yield Stress ◽

Atom Probe Tomography ◽

Atom Probe ◽

Early Stages

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The β'-α' Interaction: a Study of early Stages of Phase Separation in a Fe-20%Cr-6%Al-0.5%Ti Alloy

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.172-174.315 ◽

2011 ◽

Vol 172-174 ◽

pp. 315-320

Author(s):

Carlos Capdevila ◽

Michael K. Miller ◽

K.F. Russell ◽

J. Chao ◽

F.A. López

Keyword(s):

Phase Separation ◽

Atom Probe Tomography ◽

Temporal Evolution ◽

Theoretical Calculations ◽

Three Dimensional ◽

Atom Probe ◽

Early Stages ◽

Β Phase ◽

Α Phase ◽

Power Measurements

The temporal evolution of the microstructure resulting from phase separation into Fe-rich (α), Cr-rich (α¢), and Fe(Ti,Al) (β¢) phases of a Fe-20Cr-6Al-0.5Ti alloy has been analyzed by thermoelectric power measurements (TEP). The early stages of decomposition and the evolution of the three-dimensional microstructure have been analyzed by atom probe tomography (APT). The roles of Cr, Al, and Ti during the decomposition process have been investigated in terms of solute partitioning between the phases. Analysis of proximity histograms revealed that significant Al and Ti partitioning occurs, which is consistent with theoretical calculations. The results indicate that as the α-α¢ phase separation proceeds, Al and Ti are rejected into the α phase, which causes the β¢ phase to nucleate on the surface of the α¢ phase.

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Characterization of the Early Stages of Phase Separation by Atom probe Tomography

MRS Proceedings ◽

10.1557/proc-580-35 ◽

1999 ◽

Vol 580 ◽

Cited By ~ 3

Author(s):

M. K. Miller

Keyword(s):

Phase Separation ◽

Atom Probe Tomography ◽

Atom Probe ◽

Alloy 718 ◽

Early Stages ◽

Nickel Based Superalloy ◽

Secondary Precipitates ◽

Isothermal Ageing

AbstractAn atom probe tomography characterization of the early stages of phase separation in the FeCu-Ni system has been performed. The development of the copper-enriched regions into copper precipitates has been investigated during isothermal ageing at 573 K and 673 K for times up to 10,000 h. The formation and growth of the secondary precipitates in the nickel based superalloy, Alloy 718, have been determined during isothermal ageing at 873 K. These secondary precipitates were found to be a mixture of the L12-ordered γ' phase and the DO22-ordered γ” phase.

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