Fatigue and fracture toughness of a Nb-Ti-Cr-Al-X single-phase alloy at ambient temperature

被引：20

作者：

Davidson, DL ^{[1
]}

Chan, KS

Loloee, R

Crimp, MA

机构：

[1] SW Res Inst, San Antonio, TX 78238 USA

[2] Michigan State Univ, Dept Mat Sci & Mech, E Lansing, MI 48824 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2000年 / 31卷 / 04期

关键词：

D O I：

10.1007/s11661-000-0103-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue and fracture resistance of a commercially made, single-phase Nb-base alloy with 35 at. pct Ti, 5 at. pct Cr, 6 at. pct Al, and several elements to increase solid solution strengthening have been investigated. The threshold for fatigue crack growth was determined to be approximate to 7 MPa root m and fracture toughness approximate to 35 MPa root m. Crack growth was intermittent and sporadic; the fracture path was tortuous, crystallographic, and appeared to favor the {100} and {112} planes. Fatigue crack closure was measured directly at the crack tip. The fatigue and fracture properties of the commercial alloy are compared against those of Nb-Cr-Ti and Nb-Cr-Ti-Al alloys. The comparison indicated that Ti addition is beneficial for, but Al addition is detrimental to, both fracture toughness and fatigue crack resistance.

引用

页码：1075 / 1084

页数：10

共 50 条

[11] FATIGUE CRACK CLOSURE [J].

DAVIDSON, DL .

ENGINEERING FRACTURE MECHANICS, 1991, 38 (06) :393-402

[12] Fatigue crack growth through alloyed niobium, Nb-Cr2Nb, and Nb-Nb5Si3 in situ composites [J].

Davidson, DL .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1997, 28 (06) :1297-1314

[13] The effects on fracture toughness of ductile-phase composition and morphology in Nb-Cr-Ti and Nb-Si in situ composites [J].

Davidson, DL ;

Chan, KS ;

Anton, DL .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (10) :3007-3018

[14] The fatigue and fracture resistance of a Nb-Cr-Ti-Al alloy [J].

Davidson, DL ;

Chan, KS .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (08) :2007-2018

[15]

DAVIDSON DL, 2000, IN PRESS MAT SCI E A

[16]

DAVIDSON SL, 1999, UNPUB

[17]

Dipasquale J., 1995, High-Temperature Ordered Intermetallic Alloys VI. Symposium, P1347

[18] EFFECTS OF HYDROGEN ON NEAR-THRESHOLD CRACK-PROPAGATION IN NIOBIUM [J].

FARIABI, S ;

COLLINS, ALW ;

SALAMA, K .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1983, 14 (04) :701-707

[19] Atomistic simulations of fracture in the B2 phase of the Nb-Ti-Al system [J].

Farkas, D .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 249 (1-2) :249-258

[20] MEASUREMENT OF MICRODISPLACEMENTS BY MACHINE VISION PHOTOGRAMMETRY (DISMAP) [J].

FRANKE, EA ;

WENZEL, DJ ;

DAVIDSON, DL .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1991, 62 (05) :1270-1279

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