Influence of high-temperature solution treatments on mechanical properties of an Al-Si-Cu aluminum alloy

Hiroyuki Toda, Takanori Nishimura, Kentaro Uesugi, Yoshio Suzuki, Masakazu Kobayashi

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

It has been demonstrated that the strength of an Al-Si-Cu alloy is maximized by high-temperature solution treatment at 807 K, which is approximately 16 K higher than the ternary eutectic temperature. The dual-energy K-edge subtraction imaging technique has been employed to obtain the spatial distribution of copper and its change during its solution treatment in three dimensions quantitatively, providing interpretations of the improved mechanical properties in terms of age-hardenability and its spatial variation. It has been also confirmed that the occurrence of incipient local melting and the accompanying growth of micro pores adjacent to the melt regions lead to fractures caused by these defects. However, it can be inferred that the positive effects can outweigh the negative effects even above the eutectic temperature, thereby realizing the maximum strength at such relative high temperature levels.

Original languageEnglish
Pages (from-to)2014-2025
Number of pages12
JournalActa Materialia
Volume58
Issue number6
DOIs
Publication statusPublished - Apr 1 2010

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Aluminum alloys
Mechanical properties
Eutectics
Temperature
Spatial distribution
Copper
Melting
Imaging techniques
Defects

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Influence of high-temperature solution treatments on mechanical properties of an Al-Si-Cu aluminum alloy. / Toda, Hiroyuki; Nishimura, Takanori; Uesugi, Kentaro; Suzuki, Yoshio; Kobayashi, Masakazu.

In: Acta Materialia, Vol. 58, No. 6, 01.04.2010, p. 2014-2025.

Research output: Contribution to journalArticle

Toda, Hiroyuki ; Nishimura, Takanori ; Uesugi, Kentaro ; Suzuki, Yoshio ; Kobayashi, Masakazu. / Influence of high-temperature solution treatments on mechanical properties of an Al-Si-Cu aluminum alloy. In: Acta Materialia. 2010 ; Vol. 58, No. 6. pp. 2014-2025.
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