FATIGUE-CRACK PROPAGATION IN SPHEROIDAL-GRAPHITE CAST IRONS WITH DIFFERENT MICROSTRUCTURES

被引：31
|
作者：
TOKAJI, K [1 ]
OGAWA, T [1 ]
SHAMOTO, K [1 ]
机构：
[1] KAWASAKI HEAVY IND CO LTD,CHUOH KU,KOBE,JAPAN
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 1994年 / 16卷 / 05期
关键词：
CRACK PROPAGATION; CRACK CLOSURE; CRACK PROPAGATION RESISTANCE; THRESHOLD; SPHEROIDAL GRAPHITE CAST IRON; MICROSTRUCTURE;
D O I：
10.1016/0142-1123(94)90273-9
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Fatigue crack propagation (FCP) and crack closure have been investigated in four spheroidal-graphite cast irons (SGIs) with different microstructures: ferrite, pearlite, bull's eye and aus-ferrite (bainite). The FCP rates plotted against the stress intensity factor range showed a microstructure dependence due to differing contributions of crack closure. Therefore, the effect of microstructure disappeared as crack closure was taken into account, indicating that the intrinsic FCP resistance was the same for all the microstructures studied. Published FCP data on SGIs with a wide variety of microstructures are reviewed, and an overall discussion is developed on the effect of microstructure on FCP behaviour.
引用
收藏
页码：344 / 350
页数：7
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