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
收藏
页码：1075 / 1084
页数：10
相关论文
共 50 条
[21]  
Jackson M.R., 1990, REFRACTORY METALS EX, P311
[22]  
Jackson MR, 1996, JOM-J MIN MET MAT S, V48, P39
[23]  
JONES KD, 1990, THESIS RENSSELAER PO
[24]   DEFORMATION AND FRACTURE-BEHAVIOR OF NB IN NB5SI3/NB LAMINATES AND ITS EFFECT ON LAMINATE TOUGHNESS [J].
KAJUCH, J ;
SHORT, J ;
LEWANDOWSKI, JJ .
ACTA METALLURGICA ET MATERIALIA, 1995, 43 (05) :1955-1967
[25]  
KAUFMAN MF, 1999, COMMUNICATION
[26]   OBSERVATION OF A METASTABLE-B2 PHASE IN RAPIDLY SOLIDIFIED RIBBONS OF NB-AL ALLOYS [J].
KOHMOTO, H ;
SHYUE, J ;
AINDOW, M ;
FRASER, HL .
SCRIPTA METALLURGICA ET MATERIALIA, 1993, 29 (10) :1271-1274
[27]  
Li YG, 1998, MATER SCI TECH SER, V14, P732, DOI 10.1179/026708398790300927
[28]   Fatigue crack growth behavior in niobium-hydrogen alloys [J].
Lin, MCC ;
Salama, K .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1997, 28 (10) :2059-2065
[29]  
Loria EA, 1998, MAT SCI ENG A-STRUCT, V254, P63, DOI 10.1016/S0921-5093(98)00749-7
[30]  
LORIA EA, 1993, STRUCTURAL INTERMETALLICS, P699
12345