Phase equilibria and microstructure evolution of Al-Mo-Ti ternary alloys

Rikiya Nino; Juri Fujinaka; Hiroyuki Shimamura; Seiji Miura; Tetsuo Mohri

doi:10.1016/S0966-9795(03)00049-9

Phase equilibria and microstructure evolution of Al-Mo-Ti ternary alloys

Rikiya Nino, Juri Fujinaka, Hiroyuki Shimamura, Seiji Miura, Tetsuo Mohri

Institute for Materials Research (IMR)

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

10 Citations (Scopus)

Abstract

Phase equilibria in Ti-lean part of the Al-Mo-Ti ternary system is investigated to understand the microstructure evolution of near-equi-atomic MoAl alloys containing Ti up to 17 at.%. A partial reaction scheme is proposed based on experimental study. A high temperature ternary A2(bcc)-β phase with Ti concentrations ranging from 13 to 17 at.% decomposes into A15 Mo₃Al-D0₂₂ Al₃Ti two-phase lamellar structure in a manner similar with a eutectoid reaction through a continuous cooling. The decomposition kinetics of the high temperature A2 phase is suppressed by adding Ti. Fine equi-axed two-phase structure is also obtained by an isothermal aging of a retained high temperature A2 phase.

Original language	English
Pages (from-to)	611-623
Number of pages	13
Journal	Intermetallics
Volume	11
Issue number	6
DOIs	https://doi.org/10.1016/S0966-9795(03)00049-9
Publication status	Published - 2003 Jun

Keywords

A. Aluminides, miscellaneous
B. Phase diagram
D. Microstructure

ASJC Scopus subject areas

Chemistry(all)
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0966-9795(03)00049-9

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title = "Phase equilibria and microstructure evolution of Al-Mo-Ti ternary alloys",

abstract = "Phase equilibria in Ti-lean part of the Al-Mo-Ti ternary system is investigated to understand the microstructure evolution of near-equi-atomic MoAl alloys containing Ti up to 17 at.%. A partial reaction scheme is proposed based on experimental study. A high temperature ternary A2(bcc)-β phase with Ti concentrations ranging from 13 to 17 at.% decomposes into A15 Mo3Al-D022 Al3Ti two-phase lamellar structure in a manner similar with a eutectoid reaction through a continuous cooling. The decomposition kinetics of the high temperature A2 phase is suppressed by adding Ti. Fine equi-axed two-phase structure is also obtained by an isothermal aging of a retained high temperature A2 phase.",

keywords = "A. Aluminides, miscellaneous, B. Phase diagram, D. Microstructure",

author = "Rikiya Nino and Juri Fujinaka and Hiroyuki Shimamura and Seiji Miura and Tetsuo Mohri",

note = "Funding Information: The authors thank Mr. K. Ohkubo for his technical assistance. This research is partially supported by NEDO (New Energy and Industrial Technology Development Organization) under contract 98Ec07-004-02 with Hokkaido University. ",

year = "2003",

month = jun,

doi = "10.1016/S0966-9795(03)00049-9",

language = "English",

volume = "11",

pages = "611--623",

journal = "Intermetallics",

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TY - JOUR

T1 - Phase equilibria and microstructure evolution of Al-Mo-Ti ternary alloys

AU - Nino, Rikiya

AU - Fujinaka, Juri

AU - Shimamura, Hiroyuki

AU - Miura, Seiji

AU - Mohri, Tetsuo

N1 - Funding Information: The authors thank Mr. K. Ohkubo for his technical assistance. This research is partially supported by NEDO (New Energy and Industrial Technology Development Organization) under contract 98Ec07-004-02 with Hokkaido University.

PY - 2003/6

Y1 - 2003/6

N2 - Phase equilibria in Ti-lean part of the Al-Mo-Ti ternary system is investigated to understand the microstructure evolution of near-equi-atomic MoAl alloys containing Ti up to 17 at.%. A partial reaction scheme is proposed based on experimental study. A high temperature ternary A2(bcc)-β phase with Ti concentrations ranging from 13 to 17 at.% decomposes into A15 Mo3Al-D022 Al3Ti two-phase lamellar structure in a manner similar with a eutectoid reaction through a continuous cooling. The decomposition kinetics of the high temperature A2 phase is suppressed by adding Ti. Fine equi-axed two-phase structure is also obtained by an isothermal aging of a retained high temperature A2 phase.

AB - Phase equilibria in Ti-lean part of the Al-Mo-Ti ternary system is investigated to understand the microstructure evolution of near-equi-atomic MoAl alloys containing Ti up to 17 at.%. A partial reaction scheme is proposed based on experimental study. A high temperature ternary A2(bcc)-β phase with Ti concentrations ranging from 13 to 17 at.% decomposes into A15 Mo3Al-D022 Al3Ti two-phase lamellar structure in a manner similar with a eutectoid reaction through a continuous cooling. The decomposition kinetics of the high temperature A2 phase is suppressed by adding Ti. Fine equi-axed two-phase structure is also obtained by an isothermal aging of a retained high temperature A2 phase.

KW - A. Aluminides, miscellaneous

KW - B. Phase diagram

KW - D. Microstructure

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U2 - 10.1016/S0966-9795(03)00049-9

DO - 10.1016/S0966-9795(03)00049-9

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SN - 0966-9795

VL - 11

SP - 611

EP - 623

JO - Intermetallics

JF - Intermetallics

IS - 6

ER -

Phase equilibria and microstructure evolution of Al-Mo-Ti ternary alloys

Abstract

Keywords

ASJC Scopus subject areas

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