Fracture behaviour of an Al–Mg–Si industrial alloy

Urreta, S.E.; Louchet, F.; Ghilarducci, A.A.

doi:10.1016/s0921-5093(00)01706-8

Cited by 36 publications

(22 citation statements)

References 10 publications

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“…In the peak-age condition, they report that precipitates are not shearable. However, Vivas et al [21] report shearable precipitates in a peak-aged Mg-rich alloy of similar composition with that of Urreta et al, [20] but with slightly more Cu.…”

Section: Precipitation In Al-mg-si Alloysmentioning

confidence: 77%

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Aluminum Alloys with Identical Plastic Flow and Different Strain Rate Sensitivity

Picu

Öztürk

Esener

et al. 2010

Metall Mater Trans A

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Mg-rich and Si-rich aluminum alloys from the AA6XXX class are considered to demonstrate that standard heat treatments can be used to produce materials with identical plastic flow (yield stress and strain hardening) and different strain rate sensitivity. The Mg-rich alloy exhibits lower strain rate sensitivity and a different variation of this parameter with the stress (Haasen plot) relative to the Si-rich alloy. This is due to the instantaneous component of the strain rate sensitivity being smaller in the Mg-rich alloy. Hence, the underlying mechanism is not related to the presence of free, fast diffusing Mg atoms, but rather to the different nature of precipitates forming in the two alloys. A simple model is used to demonstrate that it is possible to tailor the strain rate sensitivity while preserving the flow stress by controlling the nature of precipitates and that of the dislocation-precipitate interaction.

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Section: Precipitation In Al-mg-si Alloysmentioning

confidence: 77%

“…Urreta et al [20] observed particle shearing in the underaged state of a Mg-rich alloy (Mg/Si = 1.33). In the peak-age condition, they report that precipitates are not shearable.…”

Section: Precipitation In Al-mg-si Alloysmentioning

confidence: 99%

Aluminum Alloys with Identical Plastic Flow and Different Strain Rate Sensitivity

Picu

Öztürk

Esener

et al. 2010

Metall Mater Trans A

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“…Considered that in most precipitation hardening alloys incoherent precipitates form by heterogeneous nucleation at grain boundaries, it can be expected that their local volume fraction f i will lower the fracture strain ε f i that is confined to the grain boundary region according to [3,4]:…”

Section: Fracture Strain In Relation To Grainmentioning

confidence: 99%

Untitled

Haas

Hosson

2002

Journal of Materials Science

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This paper concentrates on the influences of thermomechanical processing on fracture behaviour of Al-Mg-Si-Cu (AA6061) alloys. Important factors are grain boundary structure and extent of matrix-and grain boundary precipitation. Large grain boundary phases in the as-air-cooled alloy, explains its much smaller fracture strain with respect to the water-quenched alloy. With increasing artificial ageing time, the bulk fracture strain of the air-cooled alloy exhibits a minimum. This is due to grain boundary precipitate growth and coarsening affecting the fraction of strain confined to the grain boundary region. For the recrystallized microstructure aged to peak strength, the fraction of intergranular fracture is much larger for the air-cooled alloy. This can be understood on the basis of a much wider precipitate free zone and a smaller grain boundary precipitate volume fraction for the air-cooled alloy, increasing the fraction of strain confined to the grain boundary region by about one order of magnitude with respect to the water-quenched alloy. A much coarser distribution of intermetallic phases in the extruded microstructure is responsible for a larger degree of slip localization. This enhances the tendency for shear-and intergranular fracture, reducing the ductility and thus the fracture strain with respect to that of the recrystallized microstructure. C 2002 Kluwer Academic Publishers

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“…[40,41,42] A new equation was proposed by Komori [41] to relate the ductility to the volume fraction of voids, f c , as [17] However, the predicted results from Eq. [17] are essentially consistent with the present modeled results (Figure 7).…”

Section: Volume Fraction Of Constituentsmentioning

confidence: 99%

“…This means that the total tensile ductility, , is the sum of f in Eq. [9] and v : [18] About v , many expressions have been derived on the basis of energy balance for interfacial decohesion between particles and matrix, [38,[42][43][44] and it is more advisable that v is associated not only with the size of constituents but also with the characteristics of constituents, for example, as [42] 1( d (b) Fig. 9-The modeled dependence of tensile ductility on volume fraction and size of dispersoids.…”

Section: Size and Characteristics Of Constituentsmentioning

confidence: 99%

The influences of multiscale-sized second-phase particles on ductility of aged aluminum alloys

Liu

Zhang

Ding

et al. 2004

Metall Mater Trans A

109

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Commercially aged aluminum alloys commonly contain second-phase particles of three class sizes, and all contribute appreciably to the mechanical properties observed at the macroscopic scale. In this article, a multiscale model was constructed to describe the individual and coupling influences of the three types of second-phase particles on tensile ductility. The nonlinear relationships between the parameters of particles, including volume fraction, size, aspect ratio, shape, and ductility, were then quantitatively established and experimentally validated by the measured results from disc-shaped precipitate containing Al-Cu-Mg alloys and needle-shaped precipitate containing Al-Mg-Si alloys, as well as by using other researchers' previously published results. In addition, we discuss extending this model to predict the fracture toughness of aluminum alloys.

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Fracture behaviour of an Al–Mg–Si industrial alloy

Cited by 36 publications

References 10 publications

Aluminum Alloys with Identical Plastic Flow and Different Strain Rate Sensitivity

Aluminum Alloys with Identical Plastic Flow and Different Strain Rate Sensitivity

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The influences of multiscale-sized second-phase particles on ductility of aged aluminum alloys

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