Effects of Particle-matrix Matching on Strengthening Mechanism of Particle Reinforced Al Matrix Composites

doi:10.11901/1005.3093.2014.591

Chinese Journal of Materials Research

2015, Vol. 29

Issue (10): 744-750 DOI: 10.11901/1005.3093.2014.591

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Effects of Particle-matrix Matching on Strengthening Mechanism of Particle Reinforced Al Matrix Composites

Zhaobing XIANG,Junhui NIE,Shaohua WEI,Tao ZUO,Zili MA,Jianzhong FAN(

)

General Research Institute for Nonferrous Metals, Beijing 100088, China

Cite this article:

Zhaobing XIANG,Junhui NIE,Shaohua WEI,Tao ZUO,Zili MA,Jianzhong FAN. Effects of Particle-matrix Matching on Strengthening Mechanism of Particle Reinforced Al Matrix Composites. Chinese Journal of Materials Research, 2015, 29(10): 744-750.

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Abstract

Al-based composites of 25% SiC_p/6061Al and 25% Al₂O₃/6061Al were fabricated by powder metallurgy method, and then suffered from different solution-aging treatments to ensure the composites with desired strength. The effect of particle-matrix compatibility on the tensile property of the composites was investigated by tensile test and SEM observation. Results show that the low strength Al₂O₃ particles were not suitable to strengthening the high strength 6061Al matrix. The effect of particle-matrix compatibility on strengthening mechanism was discussed, and it is believed that the particle-matrix compatibility affects the composite property through the stress transfer mechanism. The relationships between particle-matrix compatibility with the particle fracture and composites yielding were revealed, It is obtained that particle cracking decreased as particle strength increase, and finally an expression to represent the particle-matrix compatibility was summed up.

Key words: composites particle reinforced aluminum matrix composite particle-matrix matching strengthening mechanism tensile property

Received: 16 October 2014

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	Articles by authors
	Zhaobing XIANG
	Junhui NIE
	Shaohua WEI
	Tao ZUO
	Zili MA
	Jianzhong FAN

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https://www.cjmr.org/EN/10.11901/1005.3093.2014.591 OR https://www.cjmr.org/EN/Y2015/V29/I10/744

Table 1 Chemical components of 6061Al (%, mass fraction)

Fig.1 Metallograph of composites 25%Al₂O₃/6061Al (a) and 25%SiC_p/6061Al (b)

Fig.2 Stress-strain curves (a) and stress ratio-strain curve (b) of composites without heat treatment

Fig.3 Stress-strain curves of composites with different heat treatment (a) 25%Al₂O₃/6061Al, (b) 25%SiC_p/6061Al

Fig.4 Tensile fracture morphologies of composites, (a) Al₂O₃/6061Al composite without solution, (b) SiC_p/6061Al composite without solution, (c) Al₂O₃/6061Al composite with 535℃solution, (d) SiC_p/6061Al composite with 535℃solution

Fig.5 Stress-strain curves and stress ratio-strain curves of composites with 535℃ solution treatment, (a, c) stress-strain curves, (b, d) stress ratio-strain curves

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