Microstructure and mechanical properties of twin-roll strip-cast al-5.5mg-0.02Ti alloy sheet

Boo Hyeon Cheon; Jun Hyun Han; Hyoung Wook Kim; Jae Chul Lee

doi:10.3365/KJMM.2010.48.05.387

Microstructure and mechanical properties of twin-roll strip-cast al-5.5mg-0.02Ti alloy sheet

Boo Hyeon Cheon
, Jun Hyun Han
, Hyoung Wook Kim^*
, Jae Chul Lee

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

High-strength aluminum alloy sheets with high magnesium contents were fabricated by a strip caster equipped with an asymmetric nozzle, which has been proven to be effective for reducing surface defects and internal segregation. 4 mm thick as-cast sheets consisting of fine dendrites and minor Al ₈Mg₅ segregation were hot-rolled successfully to 1 mm sheets and subsequently annealed at various temperatures. The sheet revealed the tensile strength and elongation of 306 MPa and 34%, respectively, when it was rolled at 250°C and subsequently annealed at 475°C, which exhibits the feasibility of the practical application for autobodies. The observed mechanical properties were explained on the basis of the microstructural characteristics of the alloy sheets.

Original language	English
Pages (from-to)	387-393
Number of pages	7
Journal	Journal of Korean Institute of Metals and Materials
Volume	48
Issue number	5
DOIs	https://doi.org/10.3365/KJMM.2010.48.05.387
Publication status	Published - 2010 May

Keywords

Al-Mg alloy
Hot rolling
Optical microscopy
Strength
Twin-roll strip casting

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Modelling and Simulation
Surfaces, Coatings and Films
Metals and Alloys

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10.3365/KJMM.2010.48.05.387

Cite this

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title = "Microstructure and mechanical properties of twin-roll strip-cast al-5.5mg-0.02Ti alloy sheet",

abstract = "High-strength aluminum alloy sheets with high magnesium contents were fabricated by a strip caster equipped with an asymmetric nozzle, which has been proven to be effective for reducing surface defects and internal segregation. 4 mm thick as-cast sheets consisting of fine dendrites and minor Al 8Mg5 segregation were hot-rolled successfully to 1 mm sheets and subsequently annealed at various temperatures. The sheet revealed the tensile strength and elongation of 306 MPa and 34\%, respectively, when it was rolled at 250°C and subsequently annealed at 475°C, which exhibits the feasibility of the practical application for autobodies. The observed mechanical properties were explained on the basis of the microstructural characteristics of the alloy sheets.",

keywords = "Al-Mg alloy, Hot rolling, Optical microscopy, Strength, Twin-roll strip casting",

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AU - Cheon, Boo Hyeon

AU - Han, Jun Hyun

AU - Kim, Hyoung Wook

AU - Lee, Jae Chul

PY - 2010/5

Y1 - 2010/5

N2 - High-strength aluminum alloy sheets with high magnesium contents were fabricated by a strip caster equipped with an asymmetric nozzle, which has been proven to be effective for reducing surface defects and internal segregation. 4 mm thick as-cast sheets consisting of fine dendrites and minor Al 8Mg5 segregation were hot-rolled successfully to 1 mm sheets and subsequently annealed at various temperatures. The sheet revealed the tensile strength and elongation of 306 MPa and 34%, respectively, when it was rolled at 250°C and subsequently annealed at 475°C, which exhibits the feasibility of the practical application for autobodies. The observed mechanical properties were explained on the basis of the microstructural characteristics of the alloy sheets.

AB - High-strength aluminum alloy sheets with high magnesium contents were fabricated by a strip caster equipped with an asymmetric nozzle, which has been proven to be effective for reducing surface defects and internal segregation. 4 mm thick as-cast sheets consisting of fine dendrites and minor Al 8Mg5 segregation were hot-rolled successfully to 1 mm sheets and subsequently annealed at various temperatures. The sheet revealed the tensile strength and elongation of 306 MPa and 34%, respectively, when it was rolled at 250°C and subsequently annealed at 475°C, which exhibits the feasibility of the practical application for autobodies. The observed mechanical properties were explained on the basis of the microstructural characteristics of the alloy sheets.

KW - Al-Mg alloy

KW - Hot rolling

KW - Optical microscopy

KW - Strength

KW - Twin-roll strip casting

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JO - Journal of Korean Institute of Metals and Materials

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Microstructure and mechanical properties of twin-roll strip-cast al-5.5mg-0.02Ti alloy sheet

Abstract

Keywords

ASJC Scopus subject areas

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