Study on Thixo-Die-Forging of 37vol.%Al/Al₂O₃ Composite in Pseudo-Semi-Solid State

Abstract:

A new procedure, thixo-die-forging of ceramics/metal composite in the pseudo-semi-solid state, has been proposed based on powder metallurgy combining with the semi-solid processing of metal. The cup-shaped parts of Al/Al2O3 composite are processed with thixo-die-forging. By metallographic analysis and performance tests, the results show that microstructures are compact, grains are fine and mechanical properties are excellent. The bend strength and fracture toughness of 37vol.%Al/Al2O3 are about 430-690MPa and 8.5-16.8 MPa•m1/2 respectively. Comparing with those of the reaction in situ and high temperature oxidation procedures, the bend strength increases by 50% and 80%, and fracture toughness increases by 29% and 55%, respectively. The results also show that the processing parameters, such as temperature and pressure have great influences on the properties. Thixo-die-forging in the pseudo-semi-solid state can prepare Al/Al2O3 composite with high performance.

• Periodical: Advanced Materials Research (Volumes 79-82)
• Pages: 11-14
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.79-82.11
• Online since: August 2009
• Authors: Yuan Sheng Cheng
• Keywords: Bend Strength, Ceramic-Metal Composite, Fracture Toughness, Pseudo Semi Solid State, Thixo Die Forging

References

[1] JIA Cheng-chang. Introduction of Composites [J]. Beijing: Publishing Company of Metallurgical Industry, 2002 (in Chinese).

[2] Zhi-ming DU, Yuan-sheng CHENG, Shou-jing LUO. High Volume Fraction Al2O3/Al Composites Thixoforming in Pseudo-semi-solid State[J], Solid State Phenomena: 116-117(2006): 725-729.

DOI: 10.4028/www.scientific.net/ssp.116-117.725

[3] LUO Shou-jing, CHENG Yuan-sheng, WANG Peng-xiang. Pseudo-Semi-Solid Thixoforging of Cup Shell with Al/Al2O3[J]. Transactions of Nonferrous Metals Society of China. 2006, 16(4): 772-775.

DOI: 10.1016/s1003-6326(06)60324-5

[4] CHENG Yuan-sheng, LUO Shou-jing, DU Zhi-ming. Pseudo-Semi-Solid Thixoforming of Ceramic Matrix Composite. Proceedings of the 8th Esaform Conference on Material Forming. Cluj-Napoca, Roumania. 2005: 1091-1094.

[5] Du Zhi-ming, LUO Shou-jing, Sun Jia-kuan. Deformation Mechanism of Tension of 2024 Al Aloy at semi-solid state. Trans. Nonferrous. Met. Soc. China, 2000, 10(5): 666～670.

[6] LUO Shou-jing, TIAN Wen-tong. Semi-solid Process and Its Application[J]. Transactions of Nonferrous Metals Society of China. 2000, 10(6): 765-773(in Chinese).

[7] FAN Gang. Application of Semi-solid Process[J]. Casting Technology, 2001, (3): 26-29(in Chinese).

[8] LUO Shou-jing, CHENG Yuan-sheng, DU Zhi-ming. Thixoforming of SiC Ceramic Matrix Composites in Pseudo-Semi-Solid State[J]. Transactions of Nonferrous Metals Society of China, 2005, 15(5): 1062-1066.

[9] Chen Tijun, Hao Yuan, Sun Jun. Compressive deformation of semi-solid SiCp/ZA27 composites[J]. Transactions of Nonferrous Metals Society of China, 2003, 13(5): 1164~1170.

[10] S. Ji, Z. Fan. Solidification Behavior of Sn-15 Wt Pct Pb Alloy under a High Shear Rate and High Intensity of Turbulance during Semisolid Processing[J]. Metallurgical and Materials Transactions: A, 2002, 33(11): 3511~3520.

DOI: 10.1007/s11661-002-0338-4