Numerical Study of Microstructural Evolution During Homogenization of Al-Si-Mg-Fe-Mn Alloys

Priya, Pikee; Johnson, David R.; Krane, Matthew John M.

doi:10.1007/s11661-016-3610-8

Cited by 16 publications

(5 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This work is concerned with the precipitation of dispersoids with sizes of 20 to 100 nm which occurs over several hours during heating and the hold at the homogenization temperature. The radius and volume fraction of dispersoids plays an important role on the high temperature flow stress [5], the inhibition of recrystallization during and after extrusion (via Zener drag) [6] and the quench sensitivity of the alloys [7][8][9].…”

mentioning

confidence: 99%

“…Later, Cai et al developed a model to predict the solute distribution after solidification using a multicomponent Scheil model and then rationalized the spatial distribution of dispersoid precipitation based on the local chemical driving force [2]. Recently, Priya et al developed a 2D finite volume-celluar automaton model to simulate microstructure changes as the secondary dendrite arm spacing (SDAS) length scale and 1D finite difference model for the precipitation of Mg2Si during cooling [9]. In addition, Du et al developed a CALPHAD based homogenization model to predict dispersoid evolution for quaternary Al-Mn-Fe-Si alloys [17].…”

mentioning

confidence: 99%

See 1 more Smart Citation

The interaction between Mn and Fe on the precipitation of Mn/Fe dispersoids in Al-Mg-Si-Mn-Fe alloys

Liu

Parson

et al. 2018

Scripta Materialia

View full text Add to dashboard Cite

mentioning

confidence: 99%

mentioning

confidence: 99%

The interaction between Mn and Fe on the precipitation of Mn/Fe dispersoids in Al-Mg-Si-Mn-Fe alloys

Liu

Parson

et al. 2018

Scripta Materialia

View full text Add to dashboard Cite

“…compositional changes of the constituents as well as the formation of dispersoids, was aided by simulations with a statistical precipitation model termed ClaNG, which relies on the Kampmann–Wagner methodology for computing nucleation, growth and dissolution of second-phase particles using multi-component thermodynamics (Ref. [40], see also [24,26,27,49]). In order to determine the microchemistry evolution along a given process chain with the ClaNG model, the underlying time/temperature profile—here the time/temperature history of the homogenisation cycles—is input into the model.…”

Section: Discussionmentioning

confidence: 99%

Formation of intermetallic particles during solidification and homogenisation of two Al–Mg–Si alloys

Engler¹,

Schröter²,

Krause³

2023

Materials Science and Technology

View full text Add to dashboard Cite

Several key properties of aluminium semi-finished products, including formability, softening behaviour, strength and ductility, are influenced by the constitution of alloying elements in solid solution or in precipitated form, i.e. by the materials microchemistry. In the present paper, we study microchemistry reactions in two Al–Mg–Si automotive sheet alloys, AA 6005C and AA 6016, with different Mg:Si ratios. The formation of constituent phases and dispersoids during solidification and subsequent homogenisation is analysed by scanning electron microscopy and measurements of the specific electrical resistivity. Type, composition and volume fraction of the constituent phases in the as-cast state are assessed with the Alstruc solidification model. The changes in solute level and precipitation during homogenisation are traced with a statistical microchemistry simulation tool termed ClaNG.

show abstract

“…They found that a multimodal Mg 2 Si particle size distribution develops during homogenization cooling. A diffusion model was also developed by Priya et al [15], to study dissolution during homogenization holding as well as precipitation during homogenization cooling. Finally, Sarafoglou et al [5] developed a CALPHAD-based dual-grain model to consider the inhomogeneous grain size on homogenization holding and homogenization cooling.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution in a 6060 Extrudable Al-Alloy: Integrated Modeling and Experimental Validation

Aristeidakis,

Haidemenopoulos,

Bjørge

et al. 2024

Materials

View full text Add to dashboard Cite

Desirable properties including strength, ductility and extrudability of 6060 Al-alloys are highly dependent on processing to control the development of microstructural features. In this study, the process chain of an extrudable 6060 Al-alloy was modeled in an Integrated Computational Materials Engineering framework and validated experimentally via quantitative SEM-EDX and TEM. All critical processing stages were considered including casting, homogenization heating and holding, extrusion cooling and two-stage aging. Segregation and intermetallics formation were accurately predicted and experimentally verified in the as-cast condition. Diffusion simulations predicted the dissolution of intermetallics and completion of β-AlFeSi to α-AlFeSi transformation during homogenization, in excellent agreement with quantitative SEM-EDX characterization. Precipitation simulations predicted the development of a β″ strengthening dispersion during extrusion cooling and aging. Needle-shaped β″ precipitates were observed and analyzed with quantitative high-resolution TEM, validating predictions. Ensuing precipitation strengthening was modeled in terms of aging time, presenting good agreement with yield strength measurements. Precipitate-Free Zones and coarse, metastable β-type particles on dispersoids and grain boundaries were investigated. The proposed integrated modeling and characterization approach considers all critical processing stages and could be used to optimize processing of extrudable 6xxx Al-alloys, providing insight to mechanisms controlling microstructural evolution and resulting properties.

show abstract

Numerical Study of Microstructural Evolution During Homogenization of Al-Si-Mg-Fe-Mn Alloys

Cited by 16 publications

References 27 publications

The interaction between Mn and Fe on the precipitation of Mn/Fe dispersoids in Al-Mg-Si-Mn-Fe alloys

The interaction between Mn and Fe on the precipitation of Mn/Fe dispersoids in Al-Mg-Si-Mn-Fe alloys

Formation of intermetallic particles during solidification and homogenisation of two Al–Mg–Si alloys

Microstructural Evolution in a 6060 Extrudable Al-Alloy: Integrated Modeling and Experimental Validation

Contact Info

Product

Resources

About