Precipitation Kinetics of AA6082: An Experimental and Numerical Investigation

The development of simulation tools for bridging different scales are essential for understanding complex joining processes. For precipitation hardening, the Kampmann-Wagner numerical model (KWN) is an important method to account for non-isothermal second phase precipitation. This model allows to describe nucleation, growth and coarsening of precipitation hardened aluminum alloys based on a size distribution for every phase which produces precipitations. In particular, this work investigates the performance of a KWN model by [1-3] for Al-Mg-Si-alloys. The model is compared against experimental data from isothermal heat treatments taken partially from [2]. Additionally, the model is used for investigation of the precipitation kinetics for a laser beam welding process, illustrating the time-dependent development of the different parameters related to the precipitation kinetics and the resulting yield strength.

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Influence of Cd and In on the Formation Kinetics of the δ' Metastable Phase in Al-Li-In(Cd) Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.519-521.479 ◽

2006 ◽

Vol 519-521 ◽

pp. 479-482 ◽

Cited By ~ 2

Author(s):

A. Raho ◽

Kadi-Hanifi Mouhyddine

Keyword(s):

Solid Solutions ◽

Metastable Phase ◽

Precipitation Kinetics ◽

Phase Precipitation ◽

Formation Kinetics ◽

Kinetics Of

The influence of the cadmium and the indium on the kinetics of the δ’ metastable phase precipitation has been studied in Al-8.5at.%Li and Al-8.5%at.%Li- 0.2at.%In(0.3%at.%Cd) solid solutions. From the hardness isotherms the volumic fraction of the formed δ’ metastable phase is determined for different times of ageing at 150, 180 and 200°C. The incubation times of δ’ deduced from the precipitation kinetics show that In and Cd atoms retard the δ’ precipitation.

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A Study on Precipitation Kinetics of an Al-Cu-Li Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.736.3 ◽

2015 ◽

Vol 736 ◽

pp. 3-6

Author(s):

Hyun Ho Jung ◽

Ye Rim Lee ◽

Kyung Ju Min ◽

Ho Sung Lee

Keyword(s):

Activation Energy ◽

Second Phase ◽

Precipitation Kinetics ◽

Scanning Calorimetry ◽

Specific Strength ◽

Second Phase Particles ◽

Space Launch ◽

Vehicle Structure ◽

Lithium Alloys ◽

Kinetics Of

Aluminum-Copper-Lithium alloys are of strategic important [1] in lightweight aerospace structures due to their high specific modulus and specific strength and are under consideration for one of the potential choices for Korea Space Launch Vehicle structure. However, this is one of the most complicated alloys due to the precipitation of a large number of second phase particles. In this study, the precipitation kinetics of an Al-4.3%Cu-1.2%Li alloy was studied by differential scanning calorimetry (DSC) technique since precipitation plays an important role for hardening of this alloy. Several models including Kissinger’s, Starink’s and Chaturvedi’s were used to obtain the activation energy and precipitation kinetics.

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Measurement and Modeling of Second Phase Precipitation Kinetics in Zirconium Niobium Alloys

Journal of ASTM International ◽

10.1520/jai103011 ◽

2010 ◽

Vol 7 (7) ◽

pp. 103011 ◽

Cited By ~ 6

Author(s):

Maria Ivermark ◽

Joseph Robson ◽

Michael Preuss ◽

S. W. Dean

Keyword(s):

Second Phase ◽

Precipitation Kinetics ◽

Phase Precipitation ◽

Niobium Alloys

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Measurement and Modeling of Second Phase Precipitation Kinetics in Zirconium Niobium Alloys

Zirconium in the Nuclear Industry: 16th International Symposium ◽

10.1520/stp49259t ◽

2010 ◽

pp. 150-175

Author(s):

Maria Ivermark ◽

Joseph Robson ◽

Michael Preuss

Keyword(s):

Second Phase ◽

Precipitation Kinetics ◽

Phase Precipitation ◽

Niobium Alloys

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Measurement and Modeling of Second Phase Precipitation Kinetics in Zirconium Niobium Alloys

Zirconium in the Nuclear Industry: 16th International Symposium ◽

10.1520/stp152920120007 ◽

2010 ◽

pp. 150-175

Author(s):

Maria Ivermark ◽

Joseph Robson ◽

Michael Preuss

Keyword(s):

Second Phase ◽

Precipitation Kinetics ◽

Phase Precipitation ◽

Niobium Alloys

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Measurement and Modeling of Second Phase Precipitation Kinetics in Zirconium Niobium Alloys

Zirconium in the Nuclear Industry: 16th International Symposium ◽

10.1520/stp49357s ◽

2010 ◽

pp. 150-175

Author(s):

Maria Ivermark ◽

Joseph Robson ◽

Michael Preuss

Keyword(s):

Second Phase ◽

Precipitation Kinetics ◽

Phase Precipitation ◽

Niobium Alloys

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Microstructural Kinetics in Alloys Undergoing Transmutations: Application to Aic Neutron Absorbers

MRS Proceedings ◽

10.1557/proc-439-401 ◽

1996 ◽

Vol 439 ◽

Cited By ~ 1

Author(s):

C. Desgranges ◽

G. Martin ◽

F. Defoort

Keyword(s):

Grain Size ◽

Mean Field ◽

Field Approximation ◽

Mean Field Approximation ◽

Second Phase ◽

Phase Precipitation ◽

Water Reactors ◽

Two Phases ◽

Control Rods ◽

Kinetics Of

AbstractWhenever an alloy changes composition because of metal to metal transmutations, as is the case in Ag-In-Cd alloys undergoing (n, −) actions in the control rods of Pressurised Water Reactors, unique features may develop.A simple model shows that in a two components alloy more than two phases can coexist under appropriate irradiation conditions i.e. temperature, which scales diffusivities and solubilities, and flux, which scales the transmutations rate; because second phase precipitation occurs at the grain boundaries, the grain size in the underlying matrix is found to be one important parameter of the process.The above ideas are illustrated on a multicomponent alloy, the thermodynamics and the kinetics of which are treated at the same level of sophistication in a mean field approximation.

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