| TiB2和Al3Ti对近共晶Al?12.6Si合金组织、力学性能和断裂行为的影响 |
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| 作者姓名： | Surajit Basak Prosanta Biswas Surajit Patra Himadri Roy Manas Kumar Mondal |
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| 作者单位： | 1)Department of Metallurgical and Materials Engineering, National Institute of Technology, Durgapur, Durgapur- 713209, West Bengal, India |
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| 摘 要： | A near eutectic Al?12.6Si alloy was developed with 0.0wt%, 2.0wt%, 4.0wt%, and 6.0wt% Al?5Ti?1B master alloy. The microstructural morphology, hardness, tensile strength, elongation, and fracture behaviour of the alloys were studied. The unmodified Al?12.6Si alloy has an irregular needle and plate-like eutectic silicon (ESi) and coarse polygonal primary silicon (PSi) particles in the matrix-like α-Al phase. The PSi, ESi, and α-Al morphology and volume fraction were changed due to the addition of the Al?5Ti?1B master alloy. The hardness, UTS, and elongation improved due to the microstructural modification. Nano-sized in-situ Al3Ti particles and ex-situ TiB2 particles caused the microstructural modification. The fracture images of the developed alloys exhibit a ductile and brittle mode of fracture at the same time. The Al?5Ti?1B modified alloys have a more ductile mode of fracture and more dimples compared to the unmodified alloy.
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| 关 键 词： | ,,,,,,, |
Effect of TiB2 and Al3Ti on the microstructure,mechanical properties and fracture behaviour of near eutectic Al-12.6Si alloy |
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| Surajit Basak,Prosanta Biswas,Surajit Patra,Himadri Roy,Manas Kumar Mondal.Effect of TiB2 and Al3Ti on the microstructure,mechanical properties and fracture behaviour of near eutectic Al-12.6Si alloy[J].International Journal of Minerals,Metallurgy and Materials,2021,28(7):1174-1185. |
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| Authors: | Surajit Basak Prosanta Biswas Surajit Patra Himadri Roy Manas Kumar Mondal |
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| Abstract: | A near eutectic Al-12.6Si alloy was developed with 0.0wt％, 2.0wt％, 4.0wt％, and 6.0wt％ Al-5Ti-1B master alloy. The micro-structural morphology, hardness, tensile strength, elongation, and fracture behaviour of the alloys were studied. The unmodified Al-12.6Si al-loy has an irregular needle and plate-like eutectic silicon (ESi) and coarse polygonal primary silicon (PSi) particles in the matrix-like α-Al phase. The PSi, ESi, and α-Al morphology and volume fraction were changed due to the addition of the Al-5Ti-1B master alloy. The hardness, UTS, and elongation improved due to the microstructural modification. Nano-sized in-situ Al3Ti particles and ex-situ TiB2 particles caused the mi-crostructural modification. The fracture images of the developed alloys exhibit a ductile and brittle mode of fracture at the same time. The Al-5Ti-1B modified alloys have a more ductile mode of fracture and more dimples compared to the unmodified alloy. |
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| Keywords: | Al-Si alloy Al-5Ti-1B modification modification mechanism mechanical properties fracture analysis |
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