Enhancement of high temperature strength of Al-Cu alloys by minor alloying and hot working process

Mondol, Sukla; Bansal, Ujjval; Dhanalakshmi, P.; Makineni, Surendra Kumar; Mandal, A.; Chattopadhyay, K.

doi:10.1016/j.jallcom.2022.166136

Cited by 6 publications

(3 citation statements)

References 53 publications

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“…For Al–Cu alloy and Al–Cu–Zr–Sc alloy, the strength is contributed by the grain‐boundary strengthening and the precipitation strengthening. [ 20–22 ] The grain‐boundary strengthening can be calculated using the Hall–Petch relation: [ 23 ]

\left(\sigma\right)_{\text{gb}} = \left(\sigma\right)_{0} &amp;#x00026;amp;amp;plus; k d^{\left(- 1\right)/2}

where

\left(\sigma\right)_{0}

is the friction stress and k is the Hall–Petch slope. [ 15 ] For Al–Cu alloy, the values of

\left(\sigma\right)_{0}

and k are reported to be 17 MPa and 0.08 MPa·m 1/2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

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Simultaneously Improving Strength and Plasticity of Al–Cu Alloy by Introducing Spherical Precipitates

Wang,

Hou,

Gong

et al. 2023

Adv Eng Mater

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The trade‐off relation between strength and plasticity is the bottleneck that limits the development of high‐strength and high‐plasticity Al–Cu alloys. Inspired from the influence of precipitate shape on the work‐hardening behavior of Al–Cu alloys, an Al–Cu–Zr–Sc alloy containing a mixed microstructure of spherical‐shaped Al3(Zr, Sc) phases and disk‐shaped θ′ phases is successfully designed and fabricated. Surprisingly, it is found that the strength and plasticity of the Al–Cu–Zr–Sc alloy are synchronously improved compared to the Al–Cu alloy with only disk‐shaped θ′ phases. The introduction of spherical‐shaped Al3(Zr, Sc) phases can increase the yield strength without sacrificing the work‐hardening ability of the Al–Cu–Zr–Sc alloy, which is mainly attributed to the extremely small strain‐hardening exponent of the Al alloy with spherical‐shaped precipitates. Besides, the predicted strength–elongation relation of the Al–Cu alloy is established based on the exponential strain‐hardening model.

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\left(\sigma\right)_{\text{gb}} = \left(\sigma\right)_{0} &amp;#x00026;amp;amp;plus; k d^{\left(- 1\right)/2}

where

\left(\sigma\right)_{0}

is the friction stress and k is the Hall–Petch slope. [ 15 ] For Al–Cu alloy, the values of

\left(\sigma\right)_{0}

and k are reported to be 17 MPa and 0.08 MPa·m 1/2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…For Al-Cu alloy and Al-Cu-Zr-Sc alloy, the strength is contributed by the grain-boundary strengthening and the precipitation strengthening. [20][21][22] The grain-boundary strengthening can be calculated using the Hall-Petch relation: [23]…”

Section: Strengthening Mechanismsmentioning

confidence: 99%

Simultaneously Improving Strength and Plasticity of Al–Cu Alloy by Introducing Spherical Precipitates

Wang,

Hou,

Gong

et al. 2023

Adv Eng Mater

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show abstract

“…Compared to Sc, Zr is also a good candidate for enhancing high-temperature strength, as the Zr element can form the L1 2 -Al 3 Zr structure and is capable of good resistance to roughening at high temperatures of up to 400 • C, with good thermal stability, thus effectively improving the strength and heat resistance of the alloy [35]. For instance, Mondol et al [36] have shown that the YS of the Al-4.5 wt.%Cu-0.48 wt.%Zr alloy can reach 198 MPa at 250 • C. Kumar Makineni et al [37] have measured the quaternary Al-2 at.%Cu-0.1 at.%Nb-0.15 at.%Zr with a YS of 250 MPa at 250 • C.…”

Section: Introductionmentioning

confidence: 99%

Influence of Zr Microalloying on the Microstructure and Room-/High-Temperature Mechanical Properties of an Al–Cu–Mn–Fe Alloy

Liu,

Hu,

et al. 2024

Materials

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Here, 0.3 wt.%Zr was introduced in an Al-4 wt.%Cu-0.5 wt.%Mn-0.1 wt.%Fe alloy to investigate its influence on the microstructure and mechanical properties of the alloy. The microstructures of both as-cast and T6-treated Al–Cu–Mn–Fe (ACMF) and Al–Cu–Mn–Fe–Zr (ACMFZ) alloys were analyzed. The intermetallic compounds formed through the casting procedure include Al2Cu and Al7Cu2Fe, and the Al2Cu phase dissolves into the matrix and re-precipitates as θ′ phase during the T6 process. The introduction of Zr results in the precipitation of L12-Al3Zr nanometric precipitates after T6, while the θ′ precipitates in ACMFZ alloy are much finer than those in ACMF alloy. The L12-Al3Zr precipitates were found coherently located with θ′, which was assumed beneficial for stabilizing the θ′ precipitates during the high-temperature tensile process. The tensile properties of ACMF and ACMFZ alloys at room temperature and elevated temperatures (200, 300, and 400 °C) were tested. Especially, the yield strength of ACMFZ alloys can reach 128 MPa and 65 MPa at 300 °C and 400 °C, respectively, which are 31% and 33% higher than those of ACMF alloys. The strengthening mechanisms of grain size, L12-Al3Zr, and θ′ precipitates on the tensile properties were discussed. This work may be referred to for designing Al–Cu alloys for application in high-temperature fields.

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A Review of High-Strength Aluminum-Copper Alloys Fabricated by Wire Arc Additive Manufacturing: Microstructure, Properties, Defects, and Post-processing

Fan

Guo

et al. 2023

J. of Materi Eng and Perform

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Enhancement of high temperature strength of Al-Cu alloys by minor alloying and hot working process

Cited by 6 publications

References 53 publications

Simultaneously Improving Strength and Plasticity of Al–Cu Alloy by Introducing Spherical Precipitates

Simultaneously Improving Strength and Plasticity of Al–Cu Alloy by Introducing Spherical Precipitates

Influence of Zr Microalloying on the Microstructure and Room-/High-Temperature Mechanical Properties of an Al–Cu–Mn–Fe Alloy

A Review of High-Strength Aluminum-Copper Alloys Fabricated by Wire Arc Additive Manufacturing: Microstructure, Properties, Defects, and Post-processing

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