A fracture mechanics approach to interior fatigue crack growth in the very high cycle regime

被引：52
|
作者：
Ogawa, Takeshi [1 ]
Stanzl-Tschegg, Stefanie E. [2 ]
Schoenbauer, Bernd M. [2 ]
机构：
[1] Aoyama Gakuin Univ, Dept Mech Engn, Chuo Ku, Sagamihara, Kanagawa 2525258, Japan
[2] Univ Nat Resources & Life Sci BOKU, A-1190 Vienna, Austria
来源：
ENGINEERING FRACTURE MECHANICS | 2014年 / 115卷
关键词：
Ultrasonic fatigue; Cumulative damage; Repeated two-step tests; Fish-eye fracture; Fatigue crack growth; N-GREATER-THAN-10(7) CYCLES; HIGH NUMBERS; PROPAGATION; INITIATION; STEEL; ALLOY; FAILURE; LIMIT;
D O I：
10.1016/j.engfracmech.2013.11.007
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Growth rates of optically dark areas (ODA) and fish-eyes (FE) were quantified in kHzultrasonic fatigue tests on SUJ2 and 17-4PH steels at constant and repeated two-step amplitudes. Sizes of ODAs and FEs depended on the stress intensity factor (SIF) range, and interior fatigue crack growth rates (FCGR) were slower than those of "long" cracks in air, suggesting vacuum as ODA growth environment. Repeated two-step tests on SUJ2 steel served to form beach marks so that, a quantification of ODA sizes, interior FCGRs and SIFs became possible. Additional FCGR measurements of long cracks in vacuum and comparable fracture morphologies allowed estimating the growth rates of ODAs and FEs in 17-4PH steel. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：241 / 254
页数：14
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