Microstructural evaluation and corrosion resistance of semisolid cast a356 alloy processed by equal channel angular pressing

Research output: Contribution to journalArticle

Abstract

As-cast and semisolid casting using a cooling slope A356 alloy were processed by equal channel angular pressing (ECAP) for Si and grain refinement. The ECAP was conducted at room temperature in a mold, with a channel angle of 120°, and this resulted in a significant size reduction of grain and Si particles from 170.5 and 4.22 to 23.12 and 0.71 µm, respectively, after six passes of heat-treated cooling slope casting, using the ECAP process. The hardness increased with ECAP processing, from 61 HV, for the as-cast alloy, to 134 Hv, after six passes of heat-treated cooling slope casting. The corrosion resistance of the alloy improved, from 0.042 to 0.0012 mmy −1 , after the ECAP process. In this work both the strength and corrosion resistance of the ECAPed A356 alloys were improved with the application of the cooling slope process than without (i.e., from the as-cast condition).

Original languageEnglish
Article number303
JournalMetals
Volume9
Issue number3
DOIs
Publication statusPublished - 1 Mar 2019

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Equal channel angular pressing
Corrosion resistance
Cooling
Casting
Grain refinement
Hardness
Processing

Keywords

  • A356 alloy
  • Cooling slope
  • ECAP
  • Hardness
  • Pitting corrosion

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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title = "Microstructural evaluation and corrosion resistance of semisolid cast a356 alloy processed by equal channel angular pressing",
abstract = "As-cast and semisolid casting using a cooling slope A356 alloy were processed by equal channel angular pressing (ECAP) for Si and grain refinement. The ECAP was conducted at room temperature in a mold, with a channel angle of 120°, and this resulted in a significant size reduction of grain and Si particles from 170.5 and 4.22 to 23.12 and 0.71 µm, respectively, after six passes of heat-treated cooling slope casting, using the ECAP process. The hardness increased with ECAP processing, from 61 HV, for the as-cast alloy, to 134 Hv, after six passes of heat-treated cooling slope casting. The corrosion resistance of the alloy improved, from 0.042 to 0.0012 mmy −1 , after the ECAP process. In this work both the strength and corrosion resistance of the ECAPed A356 alloys were improved with the application of the cooling slope process than without (i.e., from the as-cast condition).",
keywords = "A356 alloy, Cooling slope, ECAP, Hardness, Pitting corrosion",
author = "Gebril, {Mohamed Abdelgawad} and Omar, {Mohd. Zaidi} and {Intan Fadhlina}, Mohamed and Othman, {Norinsan Kamil}",
year = "2019",
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language = "English",
volume = "9",
journal = "Metals",
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publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
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T1 - Microstructural evaluation and corrosion resistance of semisolid cast a356 alloy processed by equal channel angular pressing

AU - Gebril, Mohamed Abdelgawad

AU - Omar, Mohd. Zaidi

AU - Intan Fadhlina, Mohamed

AU - Othman, Norinsan Kamil

PY - 2019/3/1

Y1 - 2019/3/1

N2 - As-cast and semisolid casting using a cooling slope A356 alloy were processed by equal channel angular pressing (ECAP) for Si and grain refinement. The ECAP was conducted at room temperature in a mold, with a channel angle of 120°, and this resulted in a significant size reduction of grain and Si particles from 170.5 and 4.22 to 23.12 and 0.71 µm, respectively, after six passes of heat-treated cooling slope casting, using the ECAP process. The hardness increased with ECAP processing, from 61 HV, for the as-cast alloy, to 134 Hv, after six passes of heat-treated cooling slope casting. The corrosion resistance of the alloy improved, from 0.042 to 0.0012 mmy −1 , after the ECAP process. In this work both the strength and corrosion resistance of the ECAPed A356 alloys were improved with the application of the cooling slope process than without (i.e., from the as-cast condition).

AB - As-cast and semisolid casting using a cooling slope A356 alloy were processed by equal channel angular pressing (ECAP) for Si and grain refinement. The ECAP was conducted at room temperature in a mold, with a channel angle of 120°, and this resulted in a significant size reduction of grain and Si particles from 170.5 and 4.22 to 23.12 and 0.71 µm, respectively, after six passes of heat-treated cooling slope casting, using the ECAP process. The hardness increased with ECAP processing, from 61 HV, for the as-cast alloy, to 134 Hv, after six passes of heat-treated cooling slope casting. The corrosion resistance of the alloy improved, from 0.042 to 0.0012 mmy −1 , after the ECAP process. In this work both the strength and corrosion resistance of the ECAPed A356 alloys were improved with the application of the cooling slope process than without (i.e., from the as-cast condition).

KW - A356 alloy

KW - Cooling slope

KW - ECAP

KW - Hardness

KW - Pitting corrosion

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