Modification effect of Sr on the microstructures and mechanical properties of Al-10.5Si-2.0Cu recycled alloy for die casting

Sang Soo Shin; Eok Soo Kim; Gil Yong Yeom; Jae Chul Lee

doi:10.1016/j.msea.2011.10.076

Modification effect of Sr on the microstructures and mechanical properties of Al-10.5Si-2.0Cu recycled alloy for die casting

Sang Soo Shin, Eok Soo Kim, Gil Yong Yeom, Jae Chul Lee

GREEN SCHOOL (Graduate School of Energy and Environment)

Research output: Contribution to journal › Article

59 Citations (Scopus)

Abstract

The effect of Sr addition on the microstructure and mechanical properties of Al-10.5Si-2.0Cu (in wt%) recycled die-casting alloy was studied. With increasing Sr content, the morphology of the eutectic Si evolved from coarse acicular → lamellar → fine fibrous shapes. Sr addition significantly improved the mechanical properties, with the tensile strength being increased from 209 to 237. MPa and the elongation from 2.0 to 4.1%. This improvement was associated with the morphological evolution of the eutectic Si and was qualitatively evaluated by using a quality index.

Original language	English
Pages (from-to)	151-157
Number of pages	7
Journal	Materials Science and Engineering A
Volume	532
DOIs	https://doi.org/10.1016/j.msea.2011.10.076
Publication status	Published - 2012 Jan 15

Keywords

Die-casting alloys
Eutectic si
Fine fibrous
Holding time
Modification
Strontium

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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abstract = "The effect of Sr addition on the microstructure and mechanical properties of Al-10.5Si-2.0Cu (in wt%) recycled die-casting alloy was studied. With increasing Sr content, the morphology of the eutectic Si evolved from coarse acicular → lamellar → fine fibrous shapes. Sr addition significantly improved the mechanical properties, with the tensile strength being increased from 209 to 237. MPa and the elongation from 2.0 to 4.1%. This improvement was associated with the morphological evolution of the eutectic Si and was qualitatively evaluated by using a quality index.",

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AU - Lee, Jae Chul

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AB - The effect of Sr addition on the microstructure and mechanical properties of Al-10.5Si-2.0Cu (in wt%) recycled die-casting alloy was studied. With increasing Sr content, the morphology of the eutectic Si evolved from coarse acicular → lamellar → fine fibrous shapes. Sr addition significantly improved the mechanical properties, with the tensile strength being increased from 209 to 237. MPa and the elongation from 2.0 to 4.1%. This improvement was associated with the morphological evolution of the eutectic Si and was qualitatively evaluated by using a quality index.

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