| Autor: |
V.V. Ramalingam, K.V. Shankar, B. Shankar, R. Abhinandan, A. Dineshkumar, P.A. Adhithyan, K. Velusamy, A. Kapilan, N. Sudheer |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Archives of Foundry Engineering, Vol vol. 24, Iss No 2, Pp 137-142 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2299-2944 |
| DOI: |
10.24425/afe.2024.149281 |
| Popis: |
This research investigates the microstructural evolution and mechanical properties of LM25 (Al-Si-Mg) alloy and Cr-modified LM25-Cr (Al-Si-Mg-Cr) alloy. Microstructural analysis reveals distinctive ε-Si phase morphologies, with Cr addition refining dendritic structures and reducing secondary dendrite arm spacing in the as-cast condition. Cr modification results in smaller-sized grains and a modified ε-Si phase, enhancing nucleation sites and reducing ε-Si size. Microhardness studies demonstrate significant increases in hardness for both alloys after solutionising and aging treatments. Cr-enriched alloy exhibits superior hardness due to solid solution strengthening, and prolonged aging further influences ε-Si particle size and distribution. The concurrent rise in microhardness, attributed to refined dendritic structures and unique ε-Si morphology, underscores the crucial role of Cr modification in tailoring the mechanical properties of aluminium alloys for specific applications. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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