THE INITIATION AND GROWTH OF FATIGUE CRACKS IN A TITANIUM ALUMINIDE ALLOY

被引：23

作者：

DAVIDSON, DL

CAMPBELL, JB

PAGE, RA

机构：

[1] Southwest Research Institute, San Antonio, 78228-0510, TX

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1991年 / 22卷 / 02期

关键词：

D O I：

10.1007/BF02656806

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The micromechanics of small, naturally initiated fatigue cracks and large through-thickness fatigue cracks have been studied in the titanium aluminide alloy Super Alpha 2. The microstructure investigated had equal volume fractions of alpha-2 and beta-phases. Crack growth rates were higher than through alpha-beta-titanium alloys. Initiation of small cracks was found always to occur in the alpha-2 phase, and small cracks grew below DELTA-K(th), the minimum cyclic stress intensity required for growth of large fatigue cracks. A method previously proposed for reconciling the growth rates of large and small cracks is applied to these results.

引用

页码：377 / 391

页数：15

共 20 条

[1] A COMPARISON OF CRACK-TIP FIELD PARAMETERS FOR LARGE AND SMALL FATIGUE CRACKS [J].

CHAN, KS ;

LANKFORD, J ;

DAVIDSON, DL .

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 1986, 108 (03) :206-213

[2] A MODEL FOR FATIGUE CRACK ADVANCE BASED ON CRACK TIP METALLURGICAL AND MECHANICS PARAMETERS [J].

DAVIDSON, DL .

ACTA METALLURGICA, 1984, 32 (05) :707-714

[3] FATIGUE CRACK-GROWTH MECHANICS FOR TI-6AL-4V (RA) IN VACUUM AND HUMID AIR [J].

DAVIDSON, DL ;

LANKFORD, J .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (10) :1931-1940

[4]

DAVIDSON DL, 1984, FATIGUE ENG MATER, V7, P29

[5] LOW-FREQUENCY CYCLIC-LOADING STAGE FOR SEM [J].

DAVIDSON, DL ;

NAGY, A .

JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1978, 11 (03) :207-210

[6] THE DISTRIBUTION OF STRAIN WITHIN CRACK TIP PLASTIC ZONES [J].

DAVIDSON, DL .

ENGINEERING FRACTURE MECHANICS, 1986, 25 (01) :123-132

[7] SMALL AND LARGE FATIGUE CRACKS IN ALUMINUM-ALLOYS [J].

DAVIDSON, DL .

ACTA METALLURGICA, 1988, 36 (08) :2275-2282

[8]

DAVIDSON DL, 1988, FATIGUE CRACK GROWTH, P1

[9]

DAVIDSON DL, 1987, MICROSTRUCTURE FRACT, P19

[10]

HEANY JE, 1987, AVIATION WEEK SP OCT, P100

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