High strain rate superplasticity in continuous cast Al–Mg alloys prepared via friction stir processing

García-Bernal, M.A.; Mishra, Rajiv S.; Verma, Ravi; Hernández-Silva, D.

doi:10.1016/j.scriptamat.2009.01.030

Cited by 95 publications

(18 citation statements)

References 8 publications

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“…For example, in this range of temperature, Al-3%Mg-0.2%Sc alloy exhibited superplastic elongation of 640% [17] and commercial AA5083 Al alloy showed a strain rate sensitivity (SRS) of m = 0.4 [20]. Some other investigations have also reported HSRS for ultra-fine and fine grained Al-Mg alloys processed by Equal Channel Angular Extrusion (ECAP) and Friction Stir Processing (FSP) [4][5][6]. Although processing by ECAP improved the HSRS and LTS behaviors of different alloys, most of the samples used for ECAP process were in the form of rectangular or circular bars, which were not suitable for producing sheets for SPF.…”

Section: Introductionmentioning

confidence: 94%

“…Therefore, during recent years, several researches have been conducted in order to achieve high strain rate superplasticity (HSRS) for commercial aluminum alloys [3][4][5][6]. In practice, high strain rate superplasticity refers to a superplastic ductility obtainable at strain rates of 10 -2 s -1 or higher [2].…”

Section: Introductionmentioning

confidence: 99%

“…In practice, high strain rate superplasticity refers to a superplastic ductility obtainable at strain rates of 10 -2 s -1 or higher [2]. It has been shown [4][5][6][7][8][9][10] that by refining the grains to submicrometer sizes, superplasticity can occur at high strain rates and low temperatures. There are three main methods for reducing the grain size of aluminum alloys including complex thermo-mechanical treatments which involve large reductions during cold rolling [11,12], adding small amounts of alloying elements such as Zr or Sc to the base alloy [13,14] and utilizing severe plastic deformation (SPD) processes such as ECAP [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…SPD techniques are capable of producing fine and ultra-fine grain microstructures in aluminum and magnesium alloys, which can result in enhanced superplastic ductilities [19]. Ultra-fine grained aluminum alloys processed by SPD techniques have shown high strain rate superplasticity and/or low temperature superplasticity (LTS) behaviors [4][5][6][7][8][9][10][11]. For Al-Mg alloys processed by ECAP, LTS feature was obtained at temperatures of 0.6-0.65 T m [20].…”

Section: Introductionmentioning

confidence: 99%

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High strain-rate superplasticity of fine- and ultrafine-grained AA5083 aluminum alloy at intermediate temperatures

2015

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High strain-rate superplasticity of fine- and ultrafine-grained AA5083 aluminum alloy at intermediate temperatures

2015

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“…These variations influence mechanical properties of substrate significantly. FSP is a versatile process that can be used for microstructural refinement ( , developing surface composites (Ref [6][7][8][9] and superplastic behavior (Ref [10][11][12], removing casting defects ( Ref 13,14), and so on. In general, FSP can be carried out on surface or throughout the thickness of specimen.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Structural and Mechanical Properties of Al-1100 Alloy via Friction Stir Processing

Mosallaee

Dehghan

2014

J. of Materi Eng and Perform

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In the present study, the relationship between structural and mechanical properties of friction stir processed Al-1100 alloy and process parameters (tool rotation rate: x and traverse speed: m) was studied to get an better understanding and optimizing the friction stir processing (FSP) condition of this alloy. Microstructural studies revealed that increasing of x up to 720 rpm resulted in grain refinement in the stirred zone (SZ), but higher increasing of x caused grain growth in this zone. These variations of SZ grain size illustrated that the prevailing factor that determined the SZ grain size was plastic deformation at first and thereafter, peak temperature in the SZ. Mechanical properties investigations were in accordance with microstructural findings and illustrated that optimized FSP condition for Al-1100 alloy was 720 rpm and 20 mm/min. Optimized FSP condition resulted in a significant improvement of tensile strength and elongation up to 22 and 8% of those of base metal, respectively.

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Anomalous Mitigation in Phase Evolution Impacting Thermal Stability in a Rapidly Solidified AA5182 Al–Mg Alloy via Continuous Thin‐Strip Casting

Pouraliakbar,

Howells,

Gallerneault

et al. 2023

Adv Eng Mater

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This study, for the first time, reports an anomalous phase evolution and its impact on the thermal and oxidation behavior of rapidly solidified AA5182 Al–Mg alloy strip fabricated using a novel thin‐strip (TS) continuous casting technique. The microstructural analysis reveals a through‐thickness gradient microstructure of distinct types, morphology, and fractions of nonequilibrium Al–Mn–Fe intermetallic and Al–Mg eutectic phases. The rapid solidification experienced in TS casting effectively mitigates the formation of phases, particularly with the Al–Mg (β‐Al3Mg2) eutectic, being nearly absent from the near‐surface regions. The total fraction of formed phases is considerably lower than that in the slowly cooled direct‐chill counterpart. The solute macrosegregation also shows an inverse Mg segregation profile toward the strip surface primarily due to a higher degree of matrix supersaturation closer to the strip surface. Modeling of solidification successfully predicts the influence of cooling rate on the fractions of the nonequilibrium eutectic phase, agreeing well with the experimental data obtained from image analysis. Heat treating the samples over a broad temperature range unveiled unexpected improvements in oxidation resistance and excellent thermal stability, attributed to the absence of the eutectic β‐phase in subsurface regions. The research findings have practical implications for improving the properties of sheet Al–Mg alloys.

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High strain rate superplasticity in continuous cast Al–Mg alloys prepared via friction stir processing

Cited by 95 publications

References 8 publications

High strain-rate superplasticity of fine- and ultrafine-grained AA5083 aluminum alloy at intermediate temperatures

High strain-rate superplasticity of fine- and ultrafine-grained AA5083 aluminum alloy at intermediate temperatures

Improvement of Structural and Mechanical Properties of Al-1100 Alloy via Friction Stir Processing

Anomalous Mitigation in Phase Evolution Impacting Thermal Stability in a Rapidly Solidified AA5182 Al–Mg Alloy via Continuous Thin‐Strip Casting

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