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Fatigue Crack Growth Resistance of SiC_p Reinforced Al Alloys: Effects of Particle Size, Particle Volume Fraction, and Matrix Strength

机译:SiC_p增强铝合金的疲劳裂纹扩展阻力:粒径,颗粒体积分数和基体强度的影响

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摘要

The main aim of this work was to study the effects of particle size, particle volume fraction, and matrix strength on the long fatigue crack growth resistance of two different grades of AI alloys (A12124-T1 and A16061-T1) reinforced with SiC particles. Basically, it was found that an increase in particle volume fraction and particle size increases the fatigue crack growth resistance at near threshold and Paris regimen, with matrix strength having a smaller effect. Near final failure, the stronger and more brittle composites are affected more by static modes of failure as the applied maximum stress intensity factor (K_(max) ) approaches mode I plane strain fracture toughness (K_(IC)).
机译:这项工作的主要目的是研究粒径,颗粒体积分数和基体强度对两种不同等级的SiC颗粒增强的AI合金(A12124-T1和A16061-T1)的长期疲劳裂纹扩展阻力的影响。基本上发现,颗粒体积分数和颗粒尺寸的增加在接近阈值和巴黎方案的情况下增加了抗疲劳裂纹扩展的能力,而基体强度的影响较小。接近最终破坏时,随着施加的最大应力强度因子(K_(max))接近模式I平面应变断裂韧性(K_(IC)),静态破坏模式对强度更高,更脆的复合材料的影响更大。

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