Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites
| Autor: | C. Rajaravi, P.R. Lakshminarayanan, B. Gobalakrishnan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Materials Science (miscellaneous) al/tib2 microstructure 0211 other engineering and technologies 02 engineering and technology Microstructure stir casting Metal Matrix (mathematics) 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials al/sic visual_art 021105 building & construction visual_art.visual_art_medium Stir casting TJ1-1570 mechanical Mechanical engineering and machinery Composite material pouring temperatures |
| Zdroj: | Journal of the Mechanical Behavior of Materials, Vol 28, Iss 1, Pp 162-168 (2019) |
| ISSN: | 2191-0243 |
| Popis: | The effect of pouring temperatures of an ex situ (Al/SiCp) and in situ (Al/TiB2) metal matrix composites (MMCs) synthesized using stir casting method were studied. The Al/SiCp composite were fabricated by mixing of 6wt.% of SiCp into cast A356 aluminium alloy melt and poured at diverse pouring temperatures (730∘C, 750∘C and 770∘C). The Al/TiB2 MMCs were obtained by melting A356 aluminium alloy and mixing of KBF4 and K2TiF6 precursor salts whose stoichiometric ratio composition corresponds to 6wt.% of TiB2 reinforcement and other parameters were constant (stirring speed 300 RPM and holding time 30 minutes). The composite melt was poured into the permanent mould with varied pouring temperatures (800∘C, 820∘C and 840∘C). Coarser and homogenous SiC particles were presented in the Al/SiCp MMCs, whereas, finer and uniformly distributed TiB2 particles were appeared at the MMCs of Al/TiB2. The mechanical properties viz. tensile strength, fracture toughness and hardness of Al/SiCp and Al/TiB2 MMCs were experimentally determined as per the ASTM standards and compared. Higher tensile and fracture strength were occurred at the MMCs of Al/TiB2 as compared to Al/SiCp MMCs and base alloy of aluminium as well. Maximum hardness was attained at the pouring temperatures of 820∘C and 750∘C in the MMCs of Al/ TiB2 and Al/SiCp, respectively. |
| Databáze: | OpenAIRE |
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