Effect of liquid phase on superplastic behavior of a modified 6061 aluminum alloy

Kaibyshev, Rustam; Musin, Fanil; Gromov, D. A.; Nieh, T.G.; Lesuer, D.R.

doi:10.1016/s1359-6462(02)00169-0

Cited by 16 publications

(23 citation statements)

References 6 publications

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“…An analysis of dispersoids in thin foils was reported early. 9,10) It was shown that Zr additions resulted in the formation of Al 3 Zr dispersoids with an average size of about 30 nm in the 6061M Al ( Fig. 2(b)).…”

Section: Initial Microstructurementioning

confidence: 96%

“…• C for 10 h. A two-step TMP procedure was used for grain refinement 4,9,10) in both alloys. Both alloys were rolled to a 70% reduction in the temperature interval 400-250…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…The mechanical characterization methods have been reported previously. 9,10) The heat of fusion of these alloys was determined by using differential thermal analysis (DTA) which was performed with a 15.2 mg specimen of the 6061 Al and a 10.6 mg specimen of the 6061M Al. Samples were heated to 670…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…2(b)). 9,10) Their volume fraction is about 0.6 pct ( Table 3). Al 3 Zr particles were enriched by silicon.…”

Section: Initial Microstructurementioning

confidence: 99%

“…The superplastic behavior of a 0.15%Zr + 0.7%Cu-modified 6061 aluminum alloy is considered in comparison with the superplastic characteristics of the commercial grade 6061 Al alloy. The present work is a continuation of studies on the 6061 Al alloy, 4,9,10) with the intent of evaluating its potential for exhibiting superplasticity and enhancement of superplastic characteristics of the 6061 Al alloy by modification of its chemical composition.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cu and Zr Additions on the Superplastic Behavior of 6061 Aluminum Alloy

et al. 2002

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Experiments were conducted to evaluate the influence of zirconium and copper additions on superplastic behavior of a 6061 aluminum alloy. Fine grains were produced in a commercial grade of 6061 Al and a 0.15%Zr + 0.7%Cu-modified 6061 alloy by two-step thermomechanical processing. The superplastic properties and microstructure evolution of both alloys were examined in tension at temperatures ranging from 475 to 620 • C and strain rates ranging from 7 × 10 −6 to 2.8 × 10 −2 s −1 . It was shown using differential thermal analysis that both alloys exhibit the highest superplastic characteristics in a partially melted state. The 0.15%Zr + 0.7%Cu-modified 6061 aluminum alloy exhibits a maximum elongation-to-failure of 1300% at 590 • C and an initial strain rate of 2.8 × 10 −4 s −1 . In contrast, the highest total elongation of 350% (m ∼ 0.6) was achieved in the commercial grade 6061 alloy at 600 • C and a strain rate of 1.4 × 10 −4 s −1 . The results suggest the addition of Zr provides high stability of the fine-grained structure under superplastic deformation at high temperatures by precipitation of Al 3 Zr dispersoids. Apparently, the increased amount of liquid phase caused by the copper addition can enhance the superplastic properties of the 6061 alloy.

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Section: Initial Microstructurementioning

confidence: 96%

“…• C for 10 h. A two-step TMP procedure was used for grain refinement 4,9,10) in both alloys. Both alloys were rolled to a 70% reduction in the temperature interval 400-250…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…2(b)). 9,10) Their volume fraction is about 0.6 pct ( Table 3). Al 3 Zr particles were enriched by silicon.…”

Section: Initial Microstructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Cu and Zr Additions on the Superplastic Behavior of 6061 Aluminum Alloy

et al. 2002

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Effect of friction stir processing on the kinetics of superplastic deformation in an Al-Mg-Zr alloy

Mishra

Mahoney

et al. 2005

Metall Mater Trans A

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The effect of friction stir processing on the superplastic behavior of extruded Al-4Mg-1Zr was examined at 350°C to 600°C and at initial strain rates of 1 ϫ 10 Ϫ3 to 1 s Ϫ1 . A combination of a fine grain size of 1.5 m and high-angle grain boundaries in the friction stir-processed (FSP) alloy led to considerably enhanced superplastic ductility, much-reduced flow stress, and a shift to a higher optimum strain rate and lower optimum temperature. The as-extruded alloy exhibited the highest superplastic ductility of 1015 pct at 580°C and an initial strain rate of 1 ϫ 10 Ϫ2 s Ϫ1 , whereas a maximum elongation of 1280 pct was obtained at 525°C and an initial strain rate of 1 ϫ 10 Ϫ1 s Ϫ1 for the FSP alloy. The FSP alloy exhibited enhanced superplastic deformation kinetics compared to that predicted by the constitutive relationship for superplasticity in fine-grained aluminum alloys. A possible origin for enhanced superplastic deformation kinetics in the FSP condition is proposed.

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Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime

Choi

Jhang

2015

J Mech Sci Technol

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Effect of liquid phase on superplastic behavior of a modified 6061 aluminum alloy

Cited by 16 publications

References 6 publications

Effect of Cu and Zr Additions on the Superplastic Behavior of 6061 Aluminum Alloy

Effect of Cu and Zr Additions on the Superplastic Behavior of 6061 Aluminum Alloy

Effect of friction stir processing on the kinetics of superplastic deformation in an Al-Mg-Zr alloy

Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime

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