Evolution of precipitates in Mg−7Gd−3Y−1Nd−1Zn−0.5Zr alloy with fine plate-like 14H-LPSO structures aged at 240 °C

A quantitative life prediction method has been proposed to evaluate fatigue life during morphological evolution of precipitates in Ni-based superalloys. The method is essentially based on Eshelby’s equivalent inclusion theory and Mori-Tanaka’s mean field method. The shape stability and life prediction are discussed when the external stress and matrix plastic strain are applied. The calculated results show that the fatigue life is closely related with microstructures evolution of precipitates. The magnitude and sign of the external stress and matrix plastic strain have an important effect on fatigue life of Ni-based superalloys during the morphological evolution of precipitates.

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Formation and evolution of precipitates in high Cr ferritic heat-resistant steels

Materials Research Innovations ◽

10.1179/1432891715z.0000000001543 ◽

2015 ◽

Vol 19 (sup4) ◽

pp. S193-S198 ◽

Cited By ~ 5

Author(s):

X. S. Zhou ◽

Y. C. Liu ◽

C. X. Liu ◽

L. M. Yu ◽

H. J. Li

Keyword(s):

Heat Resistant ◽

Formation And Evolution ◽

Heat Resistant Steels ◽

Evolution Of Precipitates

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Diffusional evolution of precipitates in elastic media using the extended finite element and the level set methods

Journal of Computational Physics ◽

10.1016/j.jcp.2010.11.002 ◽

2011 ◽

Vol 230 (4) ◽

pp. 1249-1264 ◽

Cited By ~ 26

Author(s):

Ravindra Duddu ◽

David L. Chopp ◽

Peter Voorhees ◽

Brian Moran

Keyword(s):

Finite Element ◽

Level Set ◽

Level Set Methods ◽

Elastic Media ◽

Extended Finite Element ◽

Evolution Of Precipitates

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The Growth Kinetics and Shape Evolution of Precipitates Growing by the Ledge Mechanism

MRS Proceedings ◽

10.1557/proc-237-119 ◽

1991 ◽

Vol 237 ◽

Author(s):

Masato Enomoto ◽

George Spanos ◽

Robert A. Masumura

Keyword(s):

Growth Kinetics ◽

Diffusion Field ◽

Shape Evolution ◽

Field Interaction ◽

Relative Growth ◽

Nucleation Sites ◽

Simulation Results ◽

Kinetics Of ◽

Ledge Mechanism ◽

Evolution Of Precipitates

ABSTRACTThe characteristics of ledge growth of precipitates are investigated by a previously developed finite-difference computer model. The plate lengthening simulation results which incorporate measured ledge heights and spacings are in reasonable agreement with the observed lengthening behavior of plates in Fe-C alloys. The simulation which takes into account the diffusion field interaction among multiple precipitates shows that a variety of precipitate morphologies actually observed can possibly be formed solely by the change in the extent of diffusion field overlap among ledges and/or neighboring precipitates. This overlap is in turn caused by changes in the solute supersaturation, distribution of ledge nucleation sites and ledge nucleation rates. A brief discussion is made of the relative growth kinetics of ledged and disordered interfaces.

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The evolution of precipitates of 22Cr–25Ni–Mo–Nb–N heat-resistant austenitic steel in long-term creep

Materials Science and Engineering A ◽

10.1016/j.msea.2010.03.089 ◽

2010 ◽

Vol 527 (16-17) ◽

pp. 4424-4430 ◽

Cited By ~ 21

Author(s):

Bicao Peng ◽

Hongxiang Zhang ◽

Jie Hong ◽

Jiaqiang Gao ◽

Hanqian Zhang ◽

...

Keyword(s):

Austenitic Steel ◽

Heat Resistant ◽

Term Creep ◽

Evolution Of Precipitates

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Nucleation, Growth and Ostwald Ripening of Cosi2 Precipitates During Co Ion Implantation In Si

MRS Proceedings ◽

10.1557/proc-354-183 ◽

1994 ◽

Vol 354 ◽

Cited By ~ 5

Author(s):

S. Reiss ◽

M. O. Ruault ◽

J. Clayton ◽

O. Kaitasov ◽

K.-H. Heinig ◽

...

Keyword(s):

Nucleation Rate ◽

Ostwald Ripening ◽

Ion Beam ◽

Nucleation And Growth ◽

Experimental Investigations ◽

Experimental Conditions ◽

High Fluences ◽

Level Of Understanding ◽

And Diffusion ◽

Evolution Of Precipitates

AbstractThe experimental conditions during the implantation step of Ion Beam Synthesis influence crucially the formation of a buried structure in subsequent annealing steps. Due to of the complexity of the in-beam nucleation and evolution of precipitates of new phases there is still a low level of understanding. In this paper we present results of direct experimental investigations as well as results of computer simulations of in-beam nucleation and growth. The evolution of an ensemble of C0SÌ2 precipitates is mainly controlled by nucleation and diffusion. The observed decrease of the nucleation rate at high fluences can be explained by the decrease of the supersaturation of implanted atoms due to diffusion towards earlier nucleated precipitates.

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Direct observation of the dynamic evolution of precipitates in aluminium alloy 7021 at high strain rates via high energy synchrotron X-rays

Acta Materialia ◽

10.1016/j.actamat.2020.116532 ◽

2021 ◽

Vol 205 ◽

pp. 116532

Author(s):

W.U. Mirihanage ◽

J.D. Robson ◽

S. Mishra ◽

P. Hidalgo-Manrique ◽

J. Quinta da Fonseca ◽

...

Keyword(s):

Aluminium Alloy ◽

Direct Observation ◽

High Strain ◽

High Energy ◽

Dynamic Evolution ◽

Strain Rates ◽

X Rays ◽

High Strain Rates ◽

Evolution Of Precipitates

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Evolution Of Precipitate Morphology During Extrusion In Mg ZK60A Alloy

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0145 ◽

2015 ◽

Vol 60 (2) ◽

pp. 1423-1426 ◽

Cited By ~ 1

Author(s):

J. Park ◽

K.H. Jung ◽

G.A. Lee ◽

M. Kawasaki ◽

B. Ahn

Keyword(s):

Electron Backscatter Diffraction ◽

Microstructural Analysis ◽

Extrusion Process ◽

Formation Mechanisms ◽

Precipitate Morphology ◽

X Ray ◽

Transmission Electron ◽

Electron Backscatter ◽

Backscatter Diffraction ◽

Evolution Of Precipitates

Abstract In this study, a continuously casted ZK60A magnesium alloy (Mg-Zn-Zr) was extruded in two different extrusion ratios, 6:1 and 10:1. The evolution of precipitates was investigated on the two extruded materials and compared with that of as-casted material. The microstructural analysis was performed by electron backscatter diffraction and transmission electron microscopy, and the compositional information was obtained using energy-dispersive X-ray spectroscopy. Several distinct morphologies of precipitates were observed, such as dot, rod, and disk shaped. The formation mechanisms of those precipitates were discussed with respect to the heat and strain during the extrusion process.

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