Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites

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 tempe...

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Main Authors: Rajaravi C., Gobalakrishnan B., Lakshminarayanan P. R.
Format: Article
Language:English
Published: De Gruyter 2019-12-01
Series:Journal of the Mechanical Behavior of Materials
Subjects:
Online Access:https://doi.org/10.1515/jmbm-2019-0018
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spelling doaj-7a566d18e97240b89ce19cfe708d653c2021-10-02T19:26:15ZengDe GruyterJournal of the Mechanical Behavior of Materials2191-02432019-12-0128116216810.1515/jmbm-2019-0018jmbm-2019-0018Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix compositesRajaravi C.0Gobalakrishnan B.1Lakshminarayanan P. R.2Department of Mechanical Engineering, Veltech Multitech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai, Tamilnadu, IndiaDepartment of Manufacturing Engineering, Annamalai University, Chidambaram - 608002, Tamilnadu, IndiaDepartment of Manufacturing Engineering, Annamalai University, Chidambaram - 608002, Tamilnadu, IndiaThe 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.https://doi.org/10.1515/jmbm-2019-0018al/sical/tib2stir castingpouring temperaturesmicrostructuremechanical
collection DOAJ
language English
format Article
sources DOAJ
author Rajaravi C.
Gobalakrishnan B.
Lakshminarayanan P. R.
spellingShingle Rajaravi C.
Gobalakrishnan B.
Lakshminarayanan P. R.
Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites
Journal of the Mechanical Behavior of Materials
al/sic
al/tib2
stir casting
pouring temperatures
microstructure
mechanical
author_facet Rajaravi C.
Gobalakrishnan B.
Lakshminarayanan P. R.
author_sort Rajaravi C.
title Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites
title_short Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites
title_full Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites
title_fullStr Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites
title_full_unstemmed Effect of pouring temperature on cast Al/SiCp and Al/TiB2 metal matrix composites
title_sort effect of pouring temperature on cast al/sicp and al/tib2 metal matrix composites
publisher De Gruyter
series Journal of the Mechanical Behavior of Materials
issn 2191-0243
publishDate 2019-12-01
description 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.
topic al/sic
al/tib2
stir casting
pouring temperatures
microstructure
mechanical
url https://doi.org/10.1515/jmbm-2019-0018
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