Strengthening mechanisms in Al Ni Sc alloys containing Al3Ni microfibers and Al3Sc nanoprecipitates

Suwanpreecha, Chanun; Toinin, Jacques Perrin; Michi, Richard A.; Pandee, Phromphong; Dunand, David C.; Limmaneevichitr, Chaowalit

doi:10.1016/j.actamat.2018.10.059

Cited by 90 publications

(12 citation statements)

References 59 publications

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“…The Sc addition in an Al-Si eutectic alloy led to a significant increase in room temperature yield strength [29]. Suwanpreecha et al observed that the precipitation of Al 3 Sc nano precipitates in the soft α-Al matrix in α-Al-Al 3 Ni eutectic resulted in a significant increase in yield strength at 573 K as well as a two-fold increase in the threshold stress during creep at the same temperature [68,69]. Pandey et al reported that the addition of 0.15 at.% of Zr in Al-3.1 Ni alloy led to improved yield strength at room temperature and 523 K. Zr addition also provided microstructural stability during aging at 673 K due to segregation at the Al/Al 3 Ni interface.…”

Section: Comparison Of Mechanical Properties Of Different Al Alloysmentioning

confidence: 99%

Five decades of research on the development of eutectic as engineering materials

Tiwary

Pandey

Sarkar

et al. 2022

Progress in Materials Science

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Section: Comparison Of Mechanical Properties Of Different Al Alloysmentioning

confidence: 99%

Five decades of research on the development of eutectic as engineering materials

Tiwary

Pandey

Sarkar

et al. 2022

Progress in Materials Science

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“…Nickel has an extremely low solubility in aluminum at conventional solidification conditions [ 68 ], and the dissolution of Ni in the Sc and Zr bearing precipitates was not observed by atomic probe tomography [ 69 , 70 ], therefore, Ni cannot significantly influence the precipitation kinetics and parameters of dispersoids. It has been suggested that the precipitation behavior of the alloys with different Ni content was similar.…”

Section: Discussionmentioning

confidence: 99%

A High-Strain-Rate Superplasticity of the Al-Mg-Si-Zr-Sc Alloy with Ni Addition

et al. 2021

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The current study analyzed the effect of Ni content on the microstructure and superplastic deformation behavior of the Al-Mg-Si-Cu-based alloy doped with small additions of Sc and Zr. The superplasticity was observed in the studied alloys due to a bimodal particle size distribution. The coarse particles of eutectic origin Al3Ni and Mg2Si phases with a total volume fraction of 4.0–8.0% and a mean size of 1.4–1.6 µm provided the particles with a stimulated nucleation effect. The L12– structured nanoscale dispersoids of Sc- and Zr-bearing phase inhibited recrystallization and grain growth due to a strong Zener pinning effect. The positive effect of Ni on the superplasticity was revealed and confirmed by a high-temperature tensile test in a wide strain rate and temperature limits. In the alloy with 4 wt.% Ni, the elongation-to-failure of 350–520% was observed at 460 °C, in a strain rate range of 2 × 10−3–5 × 10−2 s−1.

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“…In an effort to improve strength, Sc was used in [115,116] [117]. The presence of Si widened the crystallization range, increasing the tendency of the alloy to form hot cracks during casting but having high thermal stability.…”

Section: Eutectic Based On Al−ni Systemmentioning

confidence: 99%

“…In an effort to improve strength, Sc was used in [ 115 , 116 ]. The eutectic in the Al−6wt.%Ni alloy with Al 3 Ni microfiber morphology maintained its hardness at 300 °C for up to 672 h. Additions of 0.4 wt.% Sc did not change the morphology of the Al 3 Ni microfibers and did not change the alloy thermal stability; the major effect of Sc was expressed through increased the alloy strength.…”

Section: Efforts To Increase the Upper Service Limit Of High-tempementioning

confidence: 99%

Thermal Stability of Aluminum Alloys

Czerwiński

2020

Materials

115

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Thermal stability, determining the material ability of retaining its properties at required temperatures over extended service time, is becoming the next frontier for aluminum alloys. Its improvement would substantially expand their range of structural applications, especially in automotive and aerospace industries. This report explains the fundamentals of thermal stability; definitions, the properties involved; and the deterioration indicators during thermal/thermomechanical exposures, including an impact of accidental fire, and testing techniques. For individual classes of alloys, efforts aimed at identifying factors stabilizing their microstructure at service temperatures are described. Particular attention is paid to attempts of increasing the current upper service limit of high-temperature grades. In addition to alloying aluminum with a variety of elements to create the thermally stable microstructure, in particular, transition and rare-earth metals, parallel efforts are explored through applying novel routes of alloy processing, such as rapid solidification, powder metallurgy and additive manufacturing, engineering alloys in a liquid state prior to casting, and post-casting treatments. The goal is to overcome the present barriers and to develop novel aluminum alloys with superior properties that are stable across the temperature and time space, required by modern designs.

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Strengthening mechanisms in Al Ni Sc alloys containing Al3Ni microfibers and Al3Sc nanoprecipitates

Cited by 90 publications

References 59 publications

Five decades of research on the development of eutectic as engineering materials

Five decades of research on the development of eutectic as engineering materials

A High-Strain-Rate Superplasticity of the Al-Mg-Si-Zr-Sc Alloy with Ni Addition

Thermal Stability of Aluminum Alloys

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