Metastable phase formation during α2(D019) to γ(L10) transformation in as-atomized γ-TiAl alloy powders

被引：9

作者：

Karadge, M ^{[1
]}

Gouma, PI ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 21期

关键词：

D O I：

10.1063/1.1825065

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

alpha(2)(D0(19)) to gamma(L1(0)) transformation during heating of as-atomized gamma-TiAl powder was investigated by differential scanning calorimetry and x-ray diffraction. The as-atomized coarse powder particles (gamma-TiAl powder: Ti-45Al-2Nb-0.7Mo-0.1W-2Cr-0.27O-0.2Si) with large amounts of retained alpha(2) are a perfect candidate to investigate this transformation. It was observed that alpha(2) to gamma transformation is a two-step process involving the formation of a disordered face-centered-cubic gamma(')TiAl [with a(gamma('))=c(gamma)] as an intermediate phase followed by ordering. (C) 2004 American Institute of Physics.

引用

页码：4914 / 4916

页数：3

共 5 条

[1] How does long-range order affect creep of alloys? [J].

Cahn, RW .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 324 (1-2) :1-4

[2] Lattice parameter dependence on long-range ordered degree during order-disorder transformation [J].

Chen, GL ;

Ni, XD ;

Nsongo, T .

INTERMETALLICS, 2004, 12 (7-9) :733-739

[3] Structure and properties of sputtered TiAl-M (M = Ag, Cr) thin films [J].

Coelho, C ;

Ramos, AS ;

Trindade, B ;

Vieira, MT ;

Fernandes, JV ;

Vieira, M .

SURFACE & COATINGS TECHNOLOGY, 1999, 120 :297-302

[4]

KARADGE M, IN PRESS PHILOS MAG

[5] Investigation of mechanical alloying of Ti-Al compounds using perturbed γγ-angular correlation spectroscopy, x-ray diffraction, and differential scanning calorimetry [J].

Lauer, S ;

Guan, Z ;

Wolf, H ;

Wichert, T .

JOURNAL OF MATERIALS RESEARCH, 2002, 17 (08) :2130-2139

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