Enhancement of High Temperature Strength of 2219 Alloys Through Small Additions of Nb and Zr and a Novel Heat Treatment

Mondol, Sukla; Makineni, Surendra Kumar; Kumar, Shakti; Chattopadhyay, K.

doi:10.1007/s11661-018-4614-3

Cited by 31 publications

(8 citation statements)

References 40 publications

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“…Fig. 11b shows the variation of yield strength at room temperature as a function of eutectic spacing for alloys with the unimodal distribution as well as the bimodal distribution of eutectic with varying length scales of various Al alloy composites [19,22,27,29,36,[48][49][50]52,54,[56][57][58][59][60][61][62][63][64][65][66]. The length scale heterogeneity with the complex distribution of phases placed the bimodal eutectic in a better strength-ductility trade-off than the unimodal eutectic, and other precipitation hardened Al alloys.…”

Section: Comparison Of Mechanical Properties Of Different Al Alloysmentioning

confidence: 99%

“…In contrast, the unimodal binary eutectics such as Al-Al 2 Cu, Al-Al 3 Ni, and Al-Si and ternary eutectics Al-Ni-Fe, Al-Cu-Si showed either high strength or better compressive plasticity and hence, did not possess a superior strength-ductility trade-off [1,22,27,36,51]. The addition of transition elements such as V, Ti, Sc, Zr was attempted in recent times to improve the mechanical properties of Al eutectic alloys [55][56][57]60,64,67,68]. The effects were more pronounced at higher temperatures (<473 K).…”

Section: Comparison Of Mechanical Properties Of Different Al Alloysmentioning

confidence: 99%

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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%

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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“…These ordered precipitates are stable at the temperature of our interest (200-300 °C). However, the main strengthening phases in most of these alloys coarsen rapidly above 200 °C [28,46,[98][99][100][101]. In Al-Cu alloys, coarsening of strengthening h' plates occurs at elevated temperatures ([ 200 °C) during later stages of precipitation.…”

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

confidence: 99%

“…The effect of transition elements (Sc, Ti, Zr, etc.) on the precipitation behaviour and coarsening kinetics of h' plates in Al-Cu-based alloys have been extensively studied in the past two decades [27,28,31,32,38,43,100,102,103]. The Sc addition to Al alloys results in stable L1 2 -ordered Al 3 Sc precipitates in the a-Al matrix [26][27][28][29][30][31] and this results in the segregation at the plate-matrix interface.…”

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

confidence: 99%

“…on the precipitation behaviour and coarsening kinetics of h' plates in Al-Cu-based alloys have been extensively studied in the past two decades [27,28,31,32,38,43,100,102,103]. The Sc addition to Al alloys results in stable L1 2 -ordered Al 3 Sc precipitates in the a-Al matrix [26][27][28][29][30][31] and this results in the segregation at the plate-matrix interface. The segregation of Sc atoms at the h' plate/matrix interfaces improves resistance against coarsening and concomitantly improves the mechanical properties of the alloys [38,104,105].…”

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

confidence: 99%

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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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Directed Energy Deposition‐Arc Repair Al6.5Cu2Ni0.3Ti0.5Zr0.25V Alloy: Microstructure Evolution and Strengthening Mechanism

Dai,

Song,

Chen

et al. 2024

Adv Eng Mater

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Casting Al6.5Cu2Ni0.3Ti0.5Zr0.25V alloy is applied to aircraft engine components, but the casting defects are difficult to avoid. In this research, the local defects of casting heat‐resistant Al6.5Cu2Ni0.3Ti0.5Zr0.25V alloy parts are repaired by the arc‐directed energy deposition method. To examine the mechanism of the microstructure in the repaired zone of the heat treatment condition on the high‐temperature characteristics, the microstructure evolution of the repaired zone before and after heat treatment is analyzed. The results indicate that stratification exists in the sedimentary layer, however, the overall grain distribution is relatively uniform. After heat treatment, the microstructure of the repaired zone is changed, Cu element distribution becomes uniform and dendrite segregation disappears; simultaneously, the grain in the repaired zone mainly exists as high angle grain boundaries, which improves the fracture resistance ability of the material. At 350 °C, the average tensile strength, yield strength and elongation are 120.0 MPa, 98.6 MPa and 12.9%, respectively, the tensile strength reaches 94.1% of the matrix. Dimples abound on the fracture's exterior, and the fracture form of the repaired zone is microporous aggregate fracture. δ‐Al3CuNi and γ‐Al7Cu4Ni enhance the grain boundary strength, and θ′‐Al2Cu diffuses from the α‐Al matrix during aging, which is the main reason for the excellent high‐temperature performance of the repaired zone.

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Enhancement of High Temperature Strength of 2219 Alloys Through Small Additions of Nb and Zr and a Novel Heat Treatment

Cited by 31 publications

References 40 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

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

Directed Energy Deposition‐Arc Repair Al6.5Cu2Ni0.3Ti0.5Zr0.25V Alloy: Microstructure Evolution and Strengthening Mechanism

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