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
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