A study of the hot-working behavior of SiC-Al alloy

Pickens, J. R.; Langan, Timothy; England, R. O.; Liebson, Morris

doi:10.1007/bf02646164

Cited by 12 publications

(21 citation statements)

References 9 publications

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“…These phenomena, although barely considered in the literature [17], are highly vital to understand in depth the creep of age-hardenable aluminum alloys. In fact, and as it will be shown later, little agreement is found in the literature on the mechanisms that governs the creep of 6061Al alloy [4,[17][18][19][20][21][22][23][24][25], and similar difficulties are found for other age-hardenable aluminum alloys used as matrices of MMCs. Since understanding the creep of MMCs should be supported on a deep knowledge of the creep of the unreinforced alloys, it is not surprising the present weak capacity to predict the creep of aluminum alloy MMCs.…”

Section: Introductionmentioning

confidence: 90%

“…The investigations on the creep of 6061Al are mostly centered on studies of the creep of 6061Al matrix composites in which, for comparison, the unreinforced alloy has been also investigated [4,[17][18][19][20][21][22][23][24][25]. Table 1 summarizes these studies and their most relevant results and Fig.…”

Section: Data On the Creep Of 6061al Alloymentioning

confidence: 99%

“…As mentioned above, 6061Al alloy has been selected because it is extensively used in the preparation of discontinuously reinforced MMCs and, hence, in the studies of the creep behavior of MMCs. Thus, a significant number of investigations on the creep of this alloy is available in literature [4,[17][18][19][20][21][22][23][24][25]. For this reason, a review of the published studies will be conducted as a first step in this research.…”

Section: Introductionmentioning

confidence: 99%

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Creep behavior of ingot and powder metallurgy 6061Al

Fernández

González-Doncel

2007

Journal of Alloys and Compounds

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The creep behavior of 6061Al alloy obtained by ingot metallurgy and powder metallurgy, IM and PM, respectively, has been investigated in the context of published studies on this alloy. The behavior of the IM alloy in a given range of temperatures where the ␤, Mg 2 Si, precipitates are formed, is dominated by dislocation climb-controlled creep and aluminum self-diffusion as rate controlling process. A dependence of the ␤ inter-particle distance, λ, with the applied stress, σ, of the form λ ≈ 1/ √ σ is found when the creep data are analyzed in the context of the sub-structure invariant model. The superior creep resistance of the PM material can be explained if a threshold stress, σ 0 , is brought into the creep equation. This term is the difference between the applied stresses needed to reach a given strain rate in the PM and the IM alloys, and correlates well with a particle-dislocation interaction mechanism according to the Artz-Wilkinson model.

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Section: Introductionmentioning

confidence: 90%

Section: Data On the Creep Of 6061al Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Creep behavior of ingot and powder metallurgy 6061Al

Fernández

González-Doncel

2007

Journal of Alloys and Compounds

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“…The creep behavior and deformation mechanisms of these Al alloys have been extensively studied over a wide range of temperatures at moderate and low strain rates [7,8]. However, the deformation behavior at high temperature and high strain rate has received very limited attention [9,10]. Particularly, in the PM processing, few studies have been concerned with the influence of initial powder particle size on the gradient of microstructure and the properties of processed material by hot tor-sion deformation [11].…”

Section: Introductionmentioning

confidence: 99%

Microstructure gradient after hot torsion deformation of powder metallurgical 6061 Al alloy

Eddahbi

Borrego

Monge

et al. 2012

Materials Science and Engineering: A

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Abstract:The microstructure and the texture of extruded 6061 Al alloy processed by powder metallurgy (PM), using three different initial powder particle sizes, have been studied after torsion deformation at 300 • C at strain rate of 6 s −1 . The initial extruded microstructure of the three alloys consisted of elongated grains confining substructure with a typical 1 1 1 + 1 0 0 fiber texture. After torsion deformation, the torque ( ) as a function of the equivalent strain (ε eq ) showed softening and the microstructure exhibited a gradient across the section so that the inner and outer zones contained sheared-elongated and small-equiaxed subgrains, respectively. It was observed that the equivalent strain to failure for the material processed using powder particles size of less than 45 m was of about ε eq ∼ 12, compared to ε eq ∼ 1 for material processed using powder particles size of less than 25 m. The microstructural changes during hot torsion deformation of PM 6061 Al alloy should involve continuous dynamic processes.

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“…Subsequently a practical component used in the aeronautic industry was produced in isothermal conditions obtaining a defect free product. In the present study the hot formability of AA2618 + 20% Al 2 O 3 in isothermal conditions in order to correlate the forming parameters to the microstructural evolution in terms of damage mechanisms, dynamic recovery and recrystallisation (DRX) is presented [7][8][9][10][11][12]. …”

Section: Introductionmentioning

confidence: 99%