Identification of dispersoids in Al-Mg alloys containing Mn

Sheng Long Lee; Shinn Tyan Wu

doi:10.1007/BF02646649

Identification of dispersoids in Al-Mg alloys containing Mn

Sheng Long Lee, Shinn Tyan Wu

Graduate Institute of Materials Science and Engineering

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

29 Scopus citations

Abstract

The submicron dispersoids in the ingot of AA 5083 have been identified. They precipitate during the soaking treatment before hot working. Strong evidence suggests that most of them have the composition of MnAl ₄. A smaller number belong to E phase (Mg ₃Cr ₂Al ₁₈) and CrAl ₇. The presence of the dispersoids of MnAl ₄ is in contradiction with the ternary phase diagram of Al-Mg-Mn. The particle possess the shape of a rod with a hexagonal cross section. The aspect ratio ranges from one to several tens. These dispersoids may be important to the hot ductility of AA 5000 series alloys.

Original language	English
Pages (from-to)	1353-1357
Number of pages	5
Journal	Metallurgical transactions. A, Physical metallurgy and materials science
Volume	18
Issue number	8
DOIs	https://doi.org/10.1007/BF02646649
State	Published - Aug 1987

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abstract = "The submicron dispersoids in the ingot of AA 5083 have been identified. They precipitate during the soaking treatment before hot working. Strong evidence suggests that most of them have the composition of MnAl 4. A smaller number belong to E phase (Mg 3Cr 2Al 18) and CrAl 7. The presence of the dispersoids of MnAl 4 is in contradiction with the ternary phase diagram of Al-Mg-Mn. The particle possess the shape of a rod with a hexagonal cross section. The aspect ratio ranges from one to several tens. These dispersoids may be important to the hot ductility of AA 5000 series alloys.",

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AB - The submicron dispersoids in the ingot of AA 5083 have been identified. They precipitate during the soaking treatment before hot working. Strong evidence suggests that most of them have the composition of MnAl 4. A smaller number belong to E phase (Mg 3Cr 2Al 18) and CrAl 7. The presence of the dispersoids of MnAl 4 is in contradiction with the ternary phase diagram of Al-Mg-Mn. The particle possess the shape of a rod with a hexagonal cross section. The aspect ratio ranges from one to several tens. These dispersoids may be important to the hot ductility of AA 5000 series alloys.

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Identification of dispersoids in Al-Mg alloys containing Mn

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