Dynamic fracture toughness of a near alpha titanium alloy Timetal 834

被引：17
|
作者：
Prasad, Kartik [1 ]
Kamat, S. V. [1 ]
机构：
[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 491卷 / 1-2期
关键词：
Dynamic fracture toughness; Timetal 834 titanium alloy; Notch root radius; NOTCH ROOT RADIUS; STRAIN-RATE; COMPOSITE; ALUMINUM; STRESS; STEEL;
D O I：
10.1016/j.jallcom.2009.09.061
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The dynamic fracture toughness of Timetal 834 alloy under impact loading was evaluated using fatigue pre-cracked specimens and compared with the fracture toughness under static loading condition evaluated in an earlier study. It was found that the dynamic fracture toughness under impact loading was higher than the fracture toughness value under static loading conditions. This behaviour was attributed to the effect of strain rate on strain hardening exponent and yield strength. The effect of notch root radius on dynamic fracture toughness of this alloy was also studied. It was found that there exists a critical notch radius (rho(0)) of similar to 150 mu m below which the dynamic fracture toughness was independent of notch root radius. Above rho(0), the dynamic fracture toughness increased linearly with square root of notch root radius. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：237 / 241
页数：5
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