The role of Cr in promoting protective alumina scale formation by gamma-based Ti-Al-Cr alloys .2. Oxidation behavior in air

被引：111

作者：

Brady, MP ^{[1
]}

Smialek, JL ^{[1
]}

Humphrey, DL ^{[1
]}

Smith, J ^{[1
]}

机构：

[1] NASA, LEWIS RES CTR, CLEVELAND, OH 44135 USA

来源：

ACTA MATERIALIA | 1997年 / 45卷 / 06期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/S1359-6454(96)00361-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation behavior of single-phase gamma, single-phase Laves, and two-phase gamma + Laves Ti-Al-Cr alloys was investigated at 1000 degrees C in air. The addition of 4-5 at.% Cr to the gamma phase resulted in protective alumina scale formation in dry air, but titania-based nodule formation in humid room air. Two-phase gamma + Laves alloys exhibited protective alumina scale formation in both dry air and humid room air. The difference in oxidation behavior between gamma and gamma + Laves alloys was interpreted in terms of compositional changes at the alloy/scale interface during oxidation. (C) 1997 Acta Metallurgica Inc.

引用

页码：2371 / 2382

页数：12

共 19 条

[1] MECHANISM OF ISOTHERMAL OXIDATION OF THE INTERMETALLIC TIAL AND OF TIAL ALLOYS [J].

BECKER, S ;

RAHMEL, A ;

SCHORR, M ;

SCHUTZE, M .

OXIDATION OF METALS, 1992, 38 (5-6) :425-464

[2]

Berztiss D. A., 1995, High-Temperature Ordered Intermetallic Alloys VI. Symposium, P1285

[3]

Brady M. P., 1995, High-Temperature Ordered Intermetallic Alloys VI. Symposium, P1309

[4] The oxidation and protection of gamma titanium aluminides [J].

Brady, MP ;

Brindley, WJ ;

Smialek, JL ;

Locci, IE .

JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1996, 48 (11) :46-50

[5] Modification of microstructure for improved oxidation resistance in gamma-based Ti-Al-X alloys [J].

Brady, MP ;

Smialek, JL ;

Verink, ED ;

Hoelzer, DT ;

Stone, R .

MATERIALS AND MANUFACTURING PROCESSES, 1996, 11 (04) :635-653

[6] MICROSTRUCTURE OF ALUMINA-FORMING OXIDATION-RESISTANT AL-TI-CR ALLOYS [J].

BRADY, MP ;

SMIALEK, JL ;

TEREPKA, F .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 32 (10) :1659-1664

[7]

CHOUDHURY NS, 1976, PROPERTIES HIGH TEMP, P668

[8] EFFECT OF HYDROGEN AS A TEMPORARY BETA-STABILIZER ON MICROSTRUCTURE AND BRITTLE-FRACTURE BEHAVIOR IN A TITANIUM ALUMINIDE ALLOY [J].

CHU, WY ;

THOMPSON, AW .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (01) :71-81

[9]

Dettenwanger F., 1995, High-Temperature Ordered Intermetallic Alloys VI. Symposium, P981

[10]

Hayes F.H., 1992, J PHASE EQUILIB, V13, P79, DOI DOI 10.1007/BF02645384

← 1 2 →