Characterization of mechanically alloyed ternary Fe-Ti-Al powders

Su Ming Zhu; Kunihiko Iwasaki

doi:10.1016/S0921-5093(99)00146-X

Characterization of mechanically alloyed ternary Fe-Ti-Al powders

Su Ming Zhu, Kunihiko Iwasaki

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

28 Citations (Scopus)

Abstract

The effects of Ti-substitution for Fe in the Fe₃Al system on the mechanical alloying process were investigated. For this purpose, blended elemental powders with the following nominal compositions (at.%): Fe₇₅Al₂₅, Fe₇₀Ti₅Al₂₅, Fe₆₅Ti₁₀Al₂₅, Fe₆₀Ti₁₅Al₂₅, were mechanically alloyed in a high energy attritor-type ball milling system for up to 100 h. The structural evolution in these powders was characterized by scanning electron microscopy, differential thermal analysis and X-ray diffraction techniques. It was found that elemental powders were progressively transformed into nanocrystalline solid solutions during mechanical alloying. The addition of Ti in the powders shortened the milling time for solid solution formation. With increasing Ti content, the grain size of the solid solutions decreased, but the lattice parameter increased. Upon heating, the milled powders were transformed into ordered (Fe,Ti)₃Al intermetallic compounds in an extended range of temperature (from 350 to 500°C). Ti addition enhanced the occurrence of DO₃ ordering in heated powders.

Original language	English
Pages (from-to)	170-177
Number of pages	8
Journal	Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	270
Issue number	2
DOIs	https://doi.org/10.1016/S0921-5093(99)00146-X
Publication status	Published - 30 Sept 1999
Externally published	Yes

Keywords

Differential thermal analysis
Fe-Ti-Al powder
FeAl intermetallic compound
Mechanical alloying
X-ray diffraction

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10.1016/S0921-5093(99)00146-X

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title = "Characterization of mechanically alloyed ternary Fe-Ti-Al powders",

abstract = "The effects of Ti-substitution for Fe in the Fe3Al system on the mechanical alloying process were investigated. For this purpose, blended elemental powders with the following nominal compositions (at.%): Fe75Al25, Fe70Ti5Al25, Fe65Ti10Al25, Fe60Ti15Al25, were mechanically alloyed in a high energy attritor-type ball milling system for up to 100 h. The structural evolution in these powders was characterized by scanning electron microscopy, differential thermal analysis and X-ray diffraction techniques. It was found that elemental powders were progressively transformed into nanocrystalline solid solutions during mechanical alloying. The addition of Ti in the powders shortened the milling time for solid solution formation. With increasing Ti content, the grain size of the solid solutions decreased, but the lattice parameter increased. Upon heating, the milled powders were transformed into ordered (Fe,Ti)3Al intermetallic compounds in an extended range of temperature (from 350 to 500°C). Ti addition enhanced the occurrence of DO3 ordering in heated powders.",

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author = "Zhu, {Su Ming} and Kunihiko Iwasaki",

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AU - Zhu, Su Ming

AU - Iwasaki, Kunihiko

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Y1 - 1999/9/30

N2 - The effects of Ti-substitution for Fe in the Fe3Al system on the mechanical alloying process were investigated. For this purpose, blended elemental powders with the following nominal compositions (at.%): Fe75Al25, Fe70Ti5Al25, Fe65Ti10Al25, Fe60Ti15Al25, were mechanically alloyed in a high energy attritor-type ball milling system for up to 100 h. The structural evolution in these powders was characterized by scanning electron microscopy, differential thermal analysis and X-ray diffraction techniques. It was found that elemental powders were progressively transformed into nanocrystalline solid solutions during mechanical alloying. The addition of Ti in the powders shortened the milling time for solid solution formation. With increasing Ti content, the grain size of the solid solutions decreased, but the lattice parameter increased. Upon heating, the milled powders were transformed into ordered (Fe,Ti)3Al intermetallic compounds in an extended range of temperature (from 350 to 500°C). Ti addition enhanced the occurrence of DO3 ordering in heated powders.

AB - The effects of Ti-substitution for Fe in the Fe3Al system on the mechanical alloying process were investigated. For this purpose, blended elemental powders with the following nominal compositions (at.%): Fe75Al25, Fe70Ti5Al25, Fe65Ti10Al25, Fe60Ti15Al25, were mechanically alloyed in a high energy attritor-type ball milling system for up to 100 h. The structural evolution in these powders was characterized by scanning electron microscopy, differential thermal analysis and X-ray diffraction techniques. It was found that elemental powders were progressively transformed into nanocrystalline solid solutions during mechanical alloying. The addition of Ti in the powders shortened the milling time for solid solution formation. With increasing Ti content, the grain size of the solid solutions decreased, but the lattice parameter increased. Upon heating, the milled powders were transformed into ordered (Fe,Ti)3Al intermetallic compounds in an extended range of temperature (from 350 to 500°C). Ti addition enhanced the occurrence of DO3 ordering in heated powders.

KW - Differential thermal analysis

KW - Fe-Ti-Al powder

KW - FeAl intermetallic compound

KW - Mechanical alloying

KW - X-ray diffraction

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ER -

Characterization of mechanically alloyed ternary Fe-Ti-Al powders

Abstract

Keywords

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