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Study on dissolutio...
Study on dissolution of Al2Cu in al-4.3cu and a205 cast alloys
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- Zamani, Mohammadreza, 1985- (författare)
- Jönköping University,JTH, Material och tillverkning
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- Belov, Ilja (författare)
- Jönköping University,JTH, Material och tillverkning
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- Sjölander, Emma (författare)
- Scania CV AB, Södertälje, 15187, Sweden
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- Bjurenstedt, Anton, 1979- (författare)
- RISE,Tillverkningsprocesser,RISE SWECAST, Jönköping, 550 02, Sweden
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- Ghassemali, Ehsan, 1983- (författare)
- Jönköping University,JTH, Material och tillverkning
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- Seifeddine, Salem, 1978- (författare)
- Jönköping University,JTH, Material och tillverkning
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(creator_code:org_t)
- 2020-07-06
- 2020
- Engelska.
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Ingår i: Metals. - : MDPI AG. - 2075-4701. ; 10:7
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Evolution of microstructure in a binary Al-Cu system (Al-4.3Cu) and a commercially alloyed Al-Cu system (A205) during solution heat treatment was investigated using optical microscopy (OM), scanning electron microscopy (SEM), wavelength-dispersive X-ray spectroscopy (WDS), and differential scanning calorimetry (DSC). The diversified coarseness of the microstructure was initiated by controlling the solidification rate. Different solution treatment temperatures were applied to identify a proper solutioning temperature. The larger microstructural scale required an increased solutioning temperature and prolonged holding time to obtain homogenized solutes in the α-Al matrix. The diffusion of Cu primarily controlled the solution heat treatment process. A diffusion-based model was applied and calibrated to determine the dissolution rate of an Al2Cu particle in the matrix. The model operates on a similar time scale with the experimental results for the Al-4.3Cu and A205 alloys with various microstructural scales, different chemical compositions, and at different solution treatment temperatures. Three-dimensional (3D) reconstructed images from SEM images and energy dispersive spectroscopy (EDS) map of elements showed that TiB2 particles shield the Cu-rich phases in the boundaries of α-Al grains, presumably acting as a physical barrier to the diffusion of Cu solutes toward α-Al grains. The model also suggests that the effective diffusion coefficient of Cu in Al, in the presence of TiB2 particles, reduced by a factor of 2.0–2.5 in the A205 alloy compared with the binary Al-Cu alloy. © 2020 by the authors.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- A205
- Al-Cu alloy
- Diffusion-based model
- Solution heat treatment
- TiB2 particles
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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