Boron solubility and boride compositions in alpha(2)+gamma titanium aluminides

被引：71

作者：

Larson, DJ

Liu, CT

Miller, MK

机构：

[1] Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6376

来源：

INTERMETALLICS | 1997年 / 5卷 / 06期

关键词：

titanium aluminides; based on TiAl; precipitates; atom micro probe;

D O I：

10.1016/S0966-9795(97)00016-2

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：

Atom-probe field ion microscopy investigations of (alpha(2) + gamma) Ti-47%Al-2%Cr-2%Nb (at%) doped with 0.15% B and 0.2% W, indicate that the boron is mainly concentrated in boride precipitates. Several borides including TiB2, TiB and a Cr-enriched M2B phase were detected. Initial results give no appreciable evidence of boron segregation to gamma/gamma or alpha(2)/gamma interfaces. The solubility of boron in the gamma and alpha(2) matrix phases was found to be 0.011 +/- 0.006 at% B and <0.003 at% B, respectively. Published by Elsevier Science Limited.

引用

页码：411 / 414

页数：4

共 27 条

[1] ATOM-PROBE INVESTIGATION OF THE PARTITIONING OF INTERSTITIAL ELEMENTS IN 2-PHASE GAMMA+ALPHA-2 TIAL-BASED ALLOYS [J].

DENQUIN, A ;

NAKA, S ;

HUGUET, A ;

MENAND, A .

SCRIPTA METALLURGICA ET MATERIALIA, 1993, 28 (09) :1131-1136

[2]

DIMIDUK DM, 1995, GAMMA TITANIUM ALUMI, P21

[3] The nature of complex precipitates associated with the addition of boron to a gamma-based titanium aluminide [J].

Godfrey, AB ;

Loretto, MH .

INTERMETALLICS, 1996, 4 (01) :47-53

[4]

HALL EL, 1991, P ELECT MICROSCOPY S, P576

[5]

HUANG SC, 1993, STRUCTURAL INTERMETALLICS, P299

[6]

HUGET A, 1994, APPL SURF SCI, V76, P191

[7] EVOLUTION OF BORIDE MORPHOLOGIES IN TIAL-B ALLOYS [J].

HYMAN, ME ;

MCCULLOUGH, C ;

LEVI, CG ;

MEHRABIAN, R .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (07) :1647-1662

[8] MICROSTRUCTURE EVOLUTION IN TIAL ALLOYS WITH B-ADDITIONS - CONVENTIONAL SOLIDIFICATION [J].

HYMAN, ME ;

MCCULLOUGH, C ;

VALENCIA, JJ ;

LEVI, CG ;

MEHRABIAN, R .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1989, 20 (09) :1847-1859

[9] MICROSTRUCTURE OF A GAMMA ALPHA-2 BETA TI-AL ALLOY CONTAINING IRON AND VANADIUM [J].

INKSON, BJ ;

BOOTHROYD, CB ;

HUMPHREYS, CJ .

ACTA METALLURGICA ET MATERIALIA, 1993, 41 (10) :2867-2876

[10]

INKXON BJ, 1993, J PHYS CC, V7, P397

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