Acta Metall Sin  1990, Vol. 26 Issue (6): 127-131    DOI:

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FATIGUE BEHAVIOUR OF SiC_p/6061Al COMPOSITE

YU Weicheng;YUAN Jincai;WANG Zhongguang Laboratory of Fatigue and Fracture for Materials; Institute of Metal Research; Academia Sinica; Shenyang

YU Weicheng;YUAN Jincai;WANG Zhongguang Laboratory of Fatigue and Fracture for Materials; Institute of Metal Research; Academia Sinica; Shenyang. FATIGUE BEHAVIOUR OF SiC_p/6061Al COMPOSITE. Acta Metall Sin, 1990, 26(6): 127-131.

Abstract References Related Articles Recommended Metrics Download:  PDF(1587KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The fatigue properties of the composite of 6061Al reinforced by 15v.-%SiC particles sized to 10--2.5μm have been examined in comparison with 6061Al.The microprocess of fatigue crack initiation and propagation as well as dislocationstructure have also been studied using SEM and TEM. For the composites reinforcedby SiC particles of two different sizes, the fatigue strength of both at 10~7 cycles is196 MPa, i.e. 25% greater than that of matrix alloy. If cycling life below 10~7, thefatigue strength of composite reinforced by coarse SiC particles is better than thatby fine particles. The voids and microcracks initiated at and near the interface be-tween SiC_p and matrix, where the higher density dislocations are presented, will pro-pagate and link up to form the fatigue crack. It is an important evidence to notethat the dislocation channels where screw dislocation can travel are formed near inter-face and corner region of SiC_p in the composite subjected to fatigue stress, demon-strating the relationship between fatigue crack initiation and dislocation movementin the SiC particles reinforced 6061Al composite. Key words:  Al-base composite      fatigue      SiC particle      Received:  18 June 1990      Service E-mail this article Add to citation manager E-mail Alert RSS Collect articles（） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1990/V26/I6/127 1 Hurd N J. Mater Sci Technol, 1988; 4: 513 2 Yau S S, Mayer G. Mater Sci Eng, 1986; 82: 45 3 Arsenault R J. Mater Sci Eng, 1984; 64: 171 4 Vogelsang M, Arsenault R J, Fisher R M. Metall Trans, 1986; 17A: 379 5 Laird C. Fatigue and Microsturcture, Metals Park, Ohio: ASM, 1978: 149 6 Chevalier J L, Gibbons D F, Leonard L. 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