Effects of reinforcement morphology on the fatigue and fracture behavior of MoSi2/Nb composites

被引：60
|
作者：
Soboyejo, WO [1 ]
Ye, F [1 ]
Chen, LC [1 ]
Bahtishi, N [1 ]
Schwartz, DS [1 ]
Lederich, RJ [1 ]
机构：
[1] MCDONNELL DOUGLAS CORP, ST LOUIS, MO 63166 USA
来源：
ACTA MATERIALIA | 1996年 / 44卷 / 05期
关键词：
D O I：
10.1016/1359-6454(95)00272-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The results of a systematic study of the effects of reinforcement morphology on the fatigue and fracture behavior of MoSi2/Nb composites are discussed. These include experimental and analytical results obtained from studies of crack growth and crack-tip shielding mechanisms in composites reinforced with Nb particles, fibers and laminae. The crack-tip shielding contributions from crack bridging and crack-tip blunting in fiber-reinforced and laminated composites are analyzed using micromechanics models. Similarly, the toughening contributions from deflection by continuous tilting and twisting of cracks around the layered interfaces in particulate-reinforced composites are also assessed using fracture mechanics models. Linear superposition concepts are then used to obtain predictions of the overall toughening due to the different crack-tip shielding mechanisms. The paper highlights the need to control reinforcement morphology in the design of composites with improved fatigue and fracture resistance.
引用
收藏
页码：2027 / 2041
页数：15
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