ATOM-PROBE DETERMINATION OF INTERSTITIAL ELEMENT CONCENTRATION IN 2-PHASE AND SINGLE-PHASE TIAL-BASED ALLOYS

被引：42

作者：

HUGUET, A ^{[1
]}

MENAND, A ^{[1
]}

机构：

[1] UNIV ROUEN,FAC SCI,MICROSCOPIE ION LAB,CNRS,UA 808,F-76821 MONT ST AIGNAN,FRANCE

来源：

APPLIED SURFACE SCIENCE | 1994年 / 76卷 / 1-4期

关键词：

D O I：

10.1016/0169-4332(94)90342-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Interstitial elements (O,C,N) seem to have a key role with respect to mechanical properties of TiAl-based alloys. This paper presents an atom-probe study of the distribution of interstitial elements in the alpha2 and gamma phases of two-phase TiAl alloys. These elements are found to preferentially segregate in the alpha2 phase. This effect is particularly important for oxygen. Measurements of oxygen concentration in the gamma phase of two-phase and of single-phase alloys were performed. This allows the maximum solubility of oxygen in the gamma phase to be determined. The result shows that the poor low-temperature ductility of single-phase TiAl alloys cannot be simply due to the presence of oxygen in the gamma phase.

引用

页码：191 / 197

页数：7

共 16 条

[1] AN ATOM-PROBE FOR 3-DIMENSIONAL TOMOGRAPHY [J].

BLAVETTE, D ;

BOSTEL, A ;

SARRAU, JM ;

DECONIHOUT, B ;

MENAND, A .

NATURE, 1993, 363 (6428) :432-435

[2] PERFORMANCE OF AN ENERGY COMPENSATED TIME-OF-FLIGHT MASS-SPECTROMETER [J].

DECONIHOUT, B ;

MENAND, A ;

BOUET, M ;

SARRAU, JM .

SURFACE SCIENCE, 1992, 266 (1-3) :523-528

[3]

DENQUIN A, 1993, IN PRESS SCR METALL, V28

[4]

HADJADJ L, 1993, MICROSC MICROANAL MI, V3, P471

[5]

HUANG SC, 1989, MATER RES SOC SYMP P, V133, P373

[6]

HUG G, 1993, IN PRESS 27TH P M MI

[7]

HUG G, ONERA RT28728M RAPP

[8] AN ANALYTICAL ELECTRON-MICROSCOPY STUDY OF THE RECENTLY REPORTED TI2AL PHASE IN GAMMA-TIAL ALLOYS [J].

KAUFMAN, MJ ;

KONITZER, DG ;

SHULL, RD ;

FRASER, HL .

SCRIPTA METALLURGICA, 1986, 20 (01) :103-108

[9]

KAWABATA T, 1989, MATER RES SOC SYMP P, V133, P329

[10] EFFECT OF OXYGEN ADDITION ON MECHANICAL-PROPERTIES OF TIAL AT 293-1273-K [J].

KAWABATA, T ;

ABUMIYA, T ;

IZUMI, O .

ACTA METALLURGICA ET MATERIALIA, 1992, 40 (10) :2557-2567

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