Metallurgical Interface of 7075/6061 Bimetallic Composite Ingot Casted by Semi-Solid Slurry and Molten Metal Pouring

Abstract:

Article Preview

The 7075/6061 bimetallic composite ingots were prepared by semi-solid/liquid method. The microstructure characteristics of composite ingots were studied, and the diffusion law of interface components was analyzed. The results show that the semi-solid/liquid composite of 7075 and 6061 can be realized under the conditions of casting temperature of 983 K, semi-solid heating temperature of 918 K, holding time of 1h, and rapid water cooling. The obtained composite ingot has a layered distribution characteristic of "semi-solid microstructure/dendritic structure". The interface is clear, continuous, and free of impurities. From the interface to the semi-solid side, it shows such a pattern of change: “Dendritic structure” →”Semidendritic and hemispherical” → “Globularization”. Through the observation of the microstructure and the analysis of the components, the semi-solid/liquid composite mechanism is discovered to be a combination of fusion bonding and diffusion bonding.

Info:

Periodical:

Solid State Phenomena (Volume 285)

Edited by:

Qiang Zhu, Ahmed Rassili, Stephen P. Midson and Xiao Gang Hu

Pages:

326-332

Citation:

X. P. Zheng et al., "Metallurgical Interface of 7075/6061 Bimetallic Composite Ingot Casted by Semi-Solid Slurry and Molten Metal Pouring", Solid State Phenomena, Vol. 285, pp. 326-332, 2019

Online since:

January 2019

Export:

Price:

$41.00

* - Corresponding Author

[1] Jiang, Wenming, et al. Microstructure of Al/Al bimetallic composites by lost foam casting with Zn interlayer., Materials Science & Technology. 9(2017):1-6.

[2] Orozco, Katherine Martínez, et al. Experimental study and thermodynamic computational simulation of phase transformations in centrifugal casting bimetallic pipe of API 5L X65Q steel and Inconel 625 alloy., Journal of Manufacturing Processes. 32(2018):318-326.

DOI: https://doi.org/10.1016/j.jmapro.2018.02.003

[3] Liu Yang. Study on composite technology and properties of Al/Fe bimetal composite in automobile engine cylinder. Shandong University, (2015).

[4] Bian, Wen Li, et al. Research and Application of Dual Liquid Bimetal Composite Casting Hammer., Applied Mechanics & Materials. 271-272(2013):268-271.

DOI: https://doi.org/10.4028/www.scientific.net/amm.271-272.268

[5] Teng, et al. Microstructure and Mechanical Properties of Overcast 6101-6101 Wrought Al Alloy Joint by Squeeze Casting., Journal of Materials Science & Technology. 32.4(2016):298-304.

DOI: https://doi.org/10.1016/j.jmst.2015.11.020

[6] Liu, Teng, et al. An investigation into aluminum–aluminum bimetal fabrication by squeeze casting., Materials & Design. 68(2015):8-17.

DOI: https://doi.org/10.1016/j.matdes.2014.11.051

[7] Wang, Tongmin, et al. Development of an 8090/3003 bimetal slab using a modified direct-chill casting process., Journal of Materials Processing Technology. 214.9(2014):1806-1811.

DOI: https://doi.org/10.1016/j.jmatprotec.2014.03.029

[8] Li, W. U., et al. Horizontal continuous casting process under electromagnetic field for preparing AA3003/AA4045 clad composite hollow billets., Chinese Journal of Nonferrous Metals. 25.8 (2015):2675-2685.

DOI: https://doi.org/10.1016/s1003-6326(15)63891-2

[9] Yang Zhao, Zhou li, and Dong Jianxiong. Observation of interface of two kinds of bi-metal composite parts prepared by thixo-forging., Transactions of Nonferrous Metals Society of China. 20.9(2010):1579-1584.

DOI: https://doi.org/10.1016/s1003-6326(09)60342-3

[10] Yan, Guang Yuan, et al. Characteristics evolution of 6009/7050 bimetal slab prepared by direct-chill casting process., Transactions of Nonferrous Metals Society of China. 26.4(2016):895-904.

DOI: https://doi.org/10.1016/s1003-6326(16)64184-5

[11] Jiang, Wenming, et al. Effects of zinc coating on interfacial microstructures and mechanical properties of aluminum/steel bimetallic composites., Journal of Alloys & Compounds. 678(2016):249-257.

DOI: https://doi.org/10.1016/j.jallcom.2016.03.276

[12] Springer, H., et al. On the formation and growth of intermetallic phases during interdiffusion between low-carbon steel and aluminum alloys., Acta Materialia. 59.4(2011):1586-1600.

DOI: https://doi.org/10.1016/j.actamat.2010.11.023

[13] Wang, Kai Kun, et al. Numerical simulation on thixo-co-extrusion of double-layer tube with A356/AZ91D., Transactions of Nonferrous Metals Society of China. 20.s3(2010):921-925.

DOI: https://doi.org/10.1016/s1003-6326(10)60607-3

[14] Sun Yonggen. RESEARCH ON SEMI-SOLID JOINING AND FORMING OF ALUMINUM ALLOY AND ALUMINUM COMPOSITE. Harbin Institute of Technology, (2013).

[15] Cheng, Yuansheng, et al. Microscopic mechanism of stamping connection of 2024-SiC_P/2024 composites in semi-solid state., Acta Materiae Compositae Sinica. 30(2013):96-101.

[16] Nazari, J., et al. Production of Copper-Aluminum Bimetal by Using Centrifugal Casting and Evaluation of Metal Interface., International Journal of Materials Lifetime. 1.1(2015):20-28.

[17] Fu, Y., and T. J. Li. Effect of ultrasonic treatment on solidification structure of 3003/4004 clad ingots., Materials & Processing Report. 27.2(2013):176-179.

DOI: https://doi.org/10.1179/175355511x13110717549233

[18] Zhen Xiaoping. Preparation and Mechanical Properties of 7075/6009 Aluminum Composites with Gradient Interface. South China University of Technology, (2009).

[19] Binesh, Behzad, and M. Aghaie-Khafri. Phase Evolution and Mechanical Behavior of the Semi-Solid SIMA Processed 7075 Aluminum Alloy., Metals - Open Access Metallurgy Journal. 6.3(2016):42.

DOI: https://doi.org/10.3390/met6030042

[20] LV Ran,XING Bo and YANG Hong-xian et al. Effect of holding parameters on semi-solid microstructure of AM60 magnesium alloy during slurry preparation for rheo-forming., Light Alloy Processing Technology. 44.11(2016):9-14.

[21] Tan Jianbo, Liu Xueping, and Li Lixin. Influence of Alloy Temperature on the Liquid Phase Segregation of Semisolid Die Forging 7075 Alloy., Foundry. 65.6 (2016): 538-541.

[22] Tan Jianbo, and Li Lixin. Effects of Holding Time on Composition Segregation in Semi-solid Casting-forging 6061Alloy.,  Special-cast and Non-ferrous Alloys. 37.8 (2017): 853-855.

[23] Hosouli, Sahand, and M. Tamizifar. The effect of process variables on mechanical properties and microstructure of Al6061 and Al7075 in friction welding connection., International Conference on Materials Engineering and Metallurgy. (2016).