日本金属学会誌

J. Japan Inst. Metals, Vol. 57, No. 11 (1993),
pp. 1268-1274

Fatigue and Fretting Fatigue Behaviors of A2024-T6 Composite MaterialsReinforced with 20 vol%SiC Particles

Norio Maruyama, Masae Sumita and Kouzou Nakazawa

National Research Institute for Metals, Tsukuba

Abstract:

A study has been made of the role of silicon carbide (SiC) particles in the fatigue strength and fretting fatigue strength at high cycles using powder metallurgy 2024-T6 Al metal matrix composites reinforced with 20 vol%. SiC particles with the mean sizes of 2 and 16 μm. The 107 cycles plain fatigue strengths of the composites were within the values estimated on the basis of the change of the elastic modulus and the ultimate tensile strength due to the reinforcement. The 107 cycles fretting fatigue strengths in the composites were about 30% higher than those estimated. This suggested that the increase in fretting fatigue strength in the composites was probably due to low stress concentration at the fretted area and crack growth resistance caused by avoiding the SiC particles at low stress intensities.


(Received May 31, 1993)

Keywords:

metal matrix composite, SiC particle, fatigue, fretting fatigue, role of reinforcement phase


PDF(Free)PDF (Free)     Table of ContentsTable of Contents

Please do not copy without permission.