The synergistic role of Mn and Zr/Ti in producing θ′/L12 co-precipitates in Al-Cu alloys

Poplawsky, Jonathan D.; Milligan, Brian; Allard, Lawrence F.; Shin, Dongwon; Shower, Patrick; Chisholm, Matthew F.; Shyam, Amit

doi:10.1016/j.actamat.2020.05.043

Cited by 99 publications

(17 citation statements)

References 50 publications

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“…There are several cast Al alloy systems whereby coarsening resistance of strengthening precipitates is enhanced by interfacial solute segregation: Zr segregation to the shells of Al 3 Sc L1 2 -nanoprecipitates in Al-Sc-Zr alloys [107,108,252], Mn and Zr segregation to interfaces of metastable θ ′ -Al 2 Cu precipitates in Al-Cu-Mn-Zr alloys [269][270][271][272], and segregation of Zr and V to interfaces of Al 3 Cu 2 Mg 9 Si 7 Q-phase in Al-Cu-Mg-Si alloys [273]. In each of these cases, the solute segregation either introduces a diffusion barrier to precipitate coarsening (lowers D in Equation ( 13)) and/or decreases the energy of the interface (σ in Equation ( 13)).…”

Section: Particle/precipitate Coarseningmentioning

confidence: 99%

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Michi

Plotkowski

Shyam

et al. 2021

International Materials Reviews

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147

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Research on powder-based additive manufacturing of aluminium alloys is rapidly increasing, and recent breakthroughs in printing of defect-free parts promise substantial movement beyond traditional Al-Si-Mg) systems. One potential technological advantage of aluminium additive manufacturing, however, has received little attention: the design of alloys for use at T >~200°C, or~1/2 of the absolute melting temperature of aluminium. Besides offering lightweighting and improved energy efficiency through replacement of ferrous, titanium, and nickel-based alloys at 200-450°C, development of such alloys will reduce economic roadblocks for widespread implementation of aluminium additive manufacturing. We herein review the existing additive manufacturing literature for three categories of potential hightemperature alloys, discuss strategies for optimizing microstructures for elevatedtemperature performance, and highlight gaps in current research. Although extensive microstructural characterisation has been performed on these alloys, we conclude that evaluations of their high-temperature mechanical properties and corrosion responses are severely deficient.

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Section: Particle/precipitate Coarseningmentioning

confidence: 99%

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Michi

Plotkowski

Shyam

et al. 2021

International Materials Reviews

Self Cite

147

View full text Add to dashboard Cite

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“…The stability of hardness values after long exposures was primarily due to Orowan strengthening and stress-free transformation strains (SFTS). Ti addition to Al-Cu-Mn-Zr alloys was reported to stabilise h' precipitates beyond 300 °C [106]. The APT and STEM results revealed that Mn stabilises h' plates and promotes Zr/Ti segregating at the interface, which eventually leads to a h'/ L1 2 -Al 3 (Zr,Ti)-type stoichiometry.…”

Section: Strengthening Due To Elemental Segregation At the Interface ...mentioning

confidence: 97%

Newer Developments in Aluminium Alloys Through Ordered Precipitates and Segregation of Transition Elements

Bansal

Chattopadhyay

2022

Trans Indian Inst Met

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Since its discovery, aluminium alloys have played a significant role in several sectors of industrial developments. The combination of high strength and low density has made these alloys attractive and played a crucial role in the automotive and aerospace industry. However, newer developments have brought exciting possibilities in high temperature and high-temperature alloy developments in the last few years. One of them is the addition of coherent, ordered precipitates of nanometric sizes. These precipitates also promote hierarchical structures and resistance to microstructure coarsening. It is also increasingly realised that controlled segregation at the precipitate/matrix interface can control and improve room and high-temperature properties. This article focuses on these developments that are expected to open up new possibilities and applications in the automotive and energy sectors.

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“…Reducing the interfacial energy can help the nucleation process [151] and when slow diffusing species are present at the precipitate interfaces, strain fields are reduced and/or the interfacial energy is reduced, the coarsening resistance can be enhanced [152]. Many systems exhibit solute segregation at the precipitate-matrix interfaces with resulting combinations of these effects, such as in Al-Cu [153][154][155][156][157][158], Al-Cu-Li [19,159], Al-Cu-Ag [160,161], Al-Zn-Mg [162,163], Al-Mg-Si-Cu [164], Al-Ni-Zr [165], Mg alloys [166,167], precipitates in steels [168,169], or superalloys [170][171][172][173].…”

Section: Interface Segregationmentioning

confidence: 99%

Precipitation kinetics in metallic alloys: Experiments and modeling

2021

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The synergistic role of Mn and Zr/Ti in producing θ′/L12 co-precipitates in Al-Cu alloys

Cited by 99 publications

References 50 publications

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Newer Developments in Aluminium Alloys Through Ordered Precipitates and Segregation of Transition Elements

Precipitation kinetics in metallic alloys: Experiments and modeling

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