English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The details of phase separation of a Ni-6.5Al-9.9Mo aged at 978 K for agingtimes ranging from 0.125 to 1024 h are investigated by atom-probe tomographyand lattice-kinetic Monte Carlo (LKMC) simulations. On the basis of thetemporal evolution of the nanostructure, three experimental regimes areidentified: (1) concomitant precipitate nucleation and growth (t less than 0.25h); (2) concurrent coagulation and coalescence (t 0.25 to 16 h); and (3)quasi-stationary coarsening of gamma prime(L12)- precipitates (t 16 to 1024 h).The temporal dependencies of the mean precipitate radius and precipitate numberdensity, Nv(t), are determined experimentally, 0.344 (0.012) and -0.95(0.02),respectively, following the predictions of quasi-stationary coarsening models.In this alloy aged at 978 K, Al partitions strongly to the gammaprime(L12)-phase with a partitioning coefficient 4.06(0.04), whereas Mo and Nipartition to the gamma(f.c.c.)-matrix with values of 0.61(0.01) and 0.90(0.01),respectively. In the quasi-stationary regime(t larger than 16h), the temporalexponents of the Al, Mo, and Ni supersaturations in both thegamma(f.c.c.)-matrix and gamma prime(L12)-precipitates are in reasonableagreement with a multi-component coarsening model's prediction of -0.33.Quantitative analyses of the edge-to-edge inter-precipitate distancesdemonstrate that coagulation and coalescence are consequences of the overlap ofthe diffusion fields surrounding the gamma prime(L12)-precipitates. Both 3-DAPT and LKMC results demonstrate that the interfacial compositional widthdecrease with increasing values. And the interfacial compositional width atinfinite ageing time are estimated to be 1.89(0.22) nm, 2.09(0.12) nm and2.64(0.03) nm for Ni, Al and Mo, respectively.

Morphological, nanostructural, and compositional evolution during phase  separation of a model Ni-Al-Mo superalloy: Atom-probe tomographic experiments  and lattice-kinetic Monte Carlo simulations