A rationalization of factors affecting strength, ductility and toughness of AA6061-type Al–Mg–Si–(Cu) alloys

Dorward, R. C.; Bouvier, Christophe

doi:10.1016/s0921-5093(98)00761-8

Cited by 51 publications

(21 citation statements)

References 10 publications

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“…Originally, the modification of the stoichiometric 6061 alloy composition with extra Si or Mg has been an important issue from a plasticity processing viewpoint [14][15]; these extra elements have been shown to affect various indices such as proof strength, UTS, ductility (formability) [16]. The addition of excess Si has now become an important measure to improve these indices except that it generally reduces toughness and hence formability [14,16,34].…”

Section: Discussionmentioning

confidence: 99%

“…The addition of excess Si has now become an important measure to improve these indices except that it generally reduces toughness and hence formability [14,16,34]. The effect of extra Mg, on the other hand, has not been extensively (and perhaps eagerly) investigated as that of Si owing possibly to its overriding negative impact (i.e.…”

Section: Discussionmentioning

confidence: 99%

“…The base alloy was then immediately water-quenched. The new alloys, on the other hand, had to go through another solution treatment at a higher temperature of 813 K × 3.6 ks (540 °C × 1 h) because the solubility of Mg 2 Si in the new alloys was significantly reduced by the extra Mg when compared with the base alloy [13][14][15]. This inevitably caused extreme grain coarsening (recrystallization) particularly at surface region where severe flow strain was imposed during die extrusion (see Fig.…”

Section: Methodsmentioning

confidence: 99%

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Effect of additional magnesium on mechanical and high-cycle fatigue properties of 6061-T6 alloy

Takahashi¹,

Shikama²,

Nakamichi³

et al. 2015

Materials Science and Engineering: A

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Abstract:The effect of additional solute magnesium (Mg) on mechanical and high-cycle-fatigue properties of 6061-T6 aluminum alloy is investigated in detail. By adding 0.5% and 0.8% Mg to the 6061-T6 alloy with a normal stoichiometric Mg 2 Si composition (base alloy), the alloy exhibits eminent strain-aging characteristics demonstrated by the emergence of serrated flow, the negative 2 strain-rate-sensitivity and relatively weakened temperature dependency of flow stress. The Mg-added new alloy also shows higher work-hardening rate than the base alloy particularly at initial flow regime and at lower strain rate. The S-N curve of the new alloy shows a clear fatigue limit which is absent in the base alloy. The fatigue limit of the new alloy is shown to be controlled by the threshold against small crack growth. Moreover, the new alloy clearly exhibits a coaxing phenomenon (time-dependent strengthening) which is absent in the base alloy. The coaxing effect is attributed to the existence of a small quasi-non-propagating crack whose growth resistance gradually increases during stress amplitude step-ups.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Effect of additional magnesium on mechanical and high-cycle fatigue properties of 6061-T6 alloy

Takahashi¹,

Shikama²,

Nakamichi³

et al. 2015

Materials Science and Engineering: A

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“…6061-T6 is frequently used for varied applications in the aerospace, construction, transportation, and industrial fields and is produced as sheets, plates, foils, pipes, structural forms, forgings, and extrusions (Dorward 1998). The chemical composition of 6061 is given in Table 9.…”

Section: Aluminum Alloymentioning

confidence: 99%

“…Historically, the alloy was thought to become more brittle due to excess Si particles at the grain boundary contributing to coarse slip behavior and dislocation pile-ups at grain boundaries. However, excess Si has since been shown to have a beneficial effect of dispersing slip in the grain interior and raising the strain hardening rate (n value) (Dorward 1998). To balance this, in contemporary AA 6061, the ratio of weight percentage, Mg:Si, is 1.73 (Dorward 1998).…”

Section: Aluminum Alloymentioning

confidence: 99%

Analysis of Lightweight Materials for the AM2 System

Allison¹,

Rushing²,

Garcia³

2014

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An analysis was performed on potential materials that could replace the 6061-T6 aluminum alloy currently used in the AM2 airfield matting for the purpose of light-weighting the design. An in-depth analysis was performed on metal and polymer matrix composites. However, neither groups of materials produced a suitable material based on operating conditions of the AM2. Newly developed extruded magnesium alloys were identified that could potentially provide weight savings of 30 to 40% while maintaining the current performance of the AM2. In addition, traditional high-strength aluminum alloys were identified that could provide substantial weight savings. However, manufacturing issues existed due to the high strength of these aluminum alloys. Finally, analysis was performed to determine the cost of manufacturing the AM2 using these alternate materials.

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Effect of Alloy Elements on Microstructures and Mechanical Properties in Al‐Mg‐Si Alloy

Kato¹,

Hisayuki²,

Sakaguchi³

et al. 2012

ICAA13: 13th International Conference on Aluminum Alloys

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An investigation has been done to study the effect of deformation ratio and two-step ageing treatment on the microstructure and the mechanical properties in an Al-Mg-Si aluminum alloy. Transmission electron microscopy is used in order to follow the distribution and the morphology of the hardening precipitates. The hardness of the alloy increases with the increasing deformation ratio. The maximum of hardness increases and is shifted to low time with an increase of the deformation ratio. The density of precipitates is more increased and the precipitates become more inhomogeneously distributed when the deformation combines with two-step ageing treatments.

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A rationalization of factors affecting strength, ductility and toughness of AA6061-type Al–Mg–Si–(Cu) alloys

Cited by 51 publications

References 10 publications

Effect of additional magnesium on mechanical and high-cycle fatigue properties of 6061-T6 alloy

Effect of additional magnesium on mechanical and high-cycle fatigue properties of 6061-T6 alloy

Analysis of Lightweight Materials for the AM2 System

Effect of Alloy Elements on Microstructures and Mechanical Properties in Al‐Mg‐Si Alloy

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