Strengthening mechanisms in solid solution aluminum alloys

Ryen, Øyvind; Nijs, O.; Sjölander, Emma; Holmedal, Bjørn; Ekström, Hans-Erik; Nes, E.

doi:10.1007/s11661-006-0142-7

Cited by 431 publications

(115 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, higher EC at 600°C after 4h (35.5 %IACS) indicated a lower Mn concentration in solid solution than at 300°C for 48h; hence, the lower YS at 600°C after 4h was likely caused by a decrease in Mn concentration from the decomposition of the supersaturated solid solution [33]. Conversely, the level of solute concentration of Mn is similar for 375°C after 48h and 600°C after 4h due to similar ECs, then the much higher YS at 375°C after 48h could be primarily contributing to the precipitation of fine dispersoids with a considerable volume fraction (Fig.…”

Section: Fig 7 Distribution Of Dispersoids At Different Conditionsmentioning

confidence: 99%

Development of Al–Mn–Mg 3004 alloy for applications at elevated temperature via dispersoid strengthening

2015

View full text Add to dashboard Cite

In this study, the potential applications of Al-Mn-Mg 3004 alloy at elevated temperature have been evaluated through the systematic study of the precipitation behavior of α-Al(MnFe)Si dispersoids and their effect on material properties during precipitation treatment and long-term thermal holding. The results demonstrate a significant dispersion strengthening effect caused by the precipitation of fine uniformly distributed dispersoids during precipitation treatment. The peak compression yield strength (YS) at 300°C of the experimental 3004 alloy can reach as high as 78 MPa due to a large volume fraction (~2.95 vol. %) of α-Al(MnFe)Si dispersoids. The dispersoids are found to be thermally stable at 300°C for up to 1000 h of holding, leading to consistently high mechanical performance and creep resistance. The superior and stable YS and creep resistance at 300°C enables the 3004 alloy to be applied to weight-sensitive applications at elevated temperatures.

show abstract

Section: Fig 7 Distribution Of Dispersoids At Different Conditionsmentioning

confidence: 99%

Development of Al–Mn–Mg 3004 alloy for applications at elevated temperature via dispersoid strengthening

2015

View full text Add to dashboard Cite

show abstract

“…23In the model,  d is measured in the TEM figures [22] as 3, K A is calculated to be 300 MPa [33], and  0 is taken as the yield strength in the annealed condition (19.3 MPa, see [77]). The remaining parameters are taken as the same values as Al-1050, see Table 4 for details.…”

Section: Cold Rolled Al-1200mentioning

confidence: 99%

A model of grain refinement and strengthening of Al alloys due to cold severe plastic deformation

Qiao

Gao

Starink

2012

Philosophical Magazine

View full text Add to dashboard Cite

This paper presents a model which quantitatively predicts grain refinement and strength/hardness of Al alloys after very high levels of cold deformation through processes including cold rolling, equal channel angular pressing (ECAP), multiple forging (MF), accumulative rolling bonding (ARB) and embossing. The model deals with materials in which plastic deformation is exclusively due to dislocation movement, which is in good approximation the case for aluminium alloys. In the early stages of deformation, the generated dislocations are stored in grains and contribute to overall strength. With increase in strain, excess dislocations form and/or move to new cell walls/grain boundaries and grains are refined. We examine this model using both our own data as well as the data in the literature. It is shown that grain size and strength/hardness are predicted to a good accuracy.

show abstract

“…The effect of single elements on solute strengthening in aluminium alloys was experimentally studied in several works (e.g. [10][11][12][13][14]). However, contribution on solid solution strengthening during the cooling process has not been subject to investigations so far.…”

mentioning

confidence: 99%

“…Therefore, reliable experimental data of well-defined material states is needed to investigate active 90 strengthening mechanisms, which have to be modelled. While strength of commercial alloys originates from a combined effect of several factors such as solid solution, grain size, aging precipitates, dispersoids or primary particles, binary alloys of high purity allow the isolation of several strength contributions [10]. Thus, binary alloys of the Al-Si system are analysed in a first step here.…”

mentioning

confidence: 99%

Quench-induced precipitates in Al–Si alloys: Calorimetric determination of solute content and characterisation of microstructure

et al. 2015

View full text Add to dashboard Cite

The present study introduces an experimental approach to investigate mechanical properties of well-defined nonequilibrium states of Al-Si alloys during cooling from solution annealing. The precipitation behaviour of binary Al-Si alloys during the cooling process has been investigated in a wide cooling rate range (2 K/s-0.0001 K/s) with differential scanning calorimetry (DSC). To access the low cooling rate range close to equilibrium an indirect DSC measurement method is introduced. Based on the enthalpy change measured by DSC a physically-based model for the calculation of remaining solute Si amount as function of temperature and cooling rate is presented.Microstructural analyses via light optical microscopy, scanning electron microscopy, atom probe tomography 50 and X-ray diffraction have been performed to evaluate the introduced model and for information on cooling rate dependent precipitate formation. It was found that quench-induced particles of different morphology are formed during cooling. Thermomechanical analyses on clearly distinct undercooled Al-Si states show that flow stress during cooling is dependent on temperature as well as cooling rate. The mechanical behaviour is therefore influenced by solute Si content and quench-induced precipitates.

show abstract

Strengthening mechanisms in solid solution aluminum alloys

Cited by 431 publications

References 13 publications

Development of Al–Mn–Mg 3004 alloy for applications at elevated temperature via dispersoid strengthening

Development of Al–Mn–Mg 3004 alloy for applications at elevated temperature via dispersoid strengthening

A model of grain refinement and strengthening of Al alloys due to cold severe plastic deformation

Quench-induced precipitates in Al–Si alloys: Calorimetric determination of solute content and characterisation of microstructure

Contact Info

Product

Resources

About