Microstructure and Mechanical Properties of TiB₂/ Al-Si Composites Fabricated by TIG Wire and Arc Additive Manufacturing

Abstract:

Bulky sample was made by using TIG wire and arc additive manufacturing (WAAM) technology, in which Ф1.6 mm filler wire of in-situ TiB₂/Al-Si composites was selected as deposition metal, following by T6 heat treatment. The microstructure and mechanical properties of the bulky sample before and after heat treatment were analyzed. Experimental results showed that the texture of the original samples parallel to the weld direction and perpendicular to the weld direction was similar consisting of columnar dendrites and equiaxed crystals. After T6 heat treatment, the hardness of the sample was increased to 115.85 HV from 62.83 HV, the yield strength of the sample was 273.33 MPa, the average tensile strength was 347.33 MPa, and the average elongation after fracture was 7.96%. Although pore defects existed in the fracture, yet the fracture of the sample was ductile fracture.

• Periodical: Materials Science Forum (Volume 944)
• Pages: 64-72
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.944.64
• Online since: January 2019
• Authors: Qing Feng Yang*, Cun Juan Xia, Ya Qi Deng
• Keywords: Mechanical Properties, Microstructure, Pore Defects, Wire and Arc Additive Manufacturing

References

[1] Q. Li, D.F. Wang, G.Q. Wang, et al. Wire and arc additive manufacturing of lightweight metal components in aeronautics and astronautics, Aeronautical Manufacturing Technology, 61(3) (2018) 74-82, 89.

[2] W. Chen, Y.H. Chen, Y.Q. Mao, Research progress in additive manufacturing technology of aluminum alloy, Journal of Netshape Forming Engineering, 9(5) (2017) 214-219.

[3] H.B. Geng, J.T. Xiong, D. Huang, et al. Research status and trend of wire and arc additive manufacturing technology, Welding & Joining, 11(1) (2015) 17-21.

[4] J.X. Zhang, A.H. Gao, Influence of Si content on microstructure and properties of 6063 aluminum alloy, Transactions of Materials and Heat Treatment, 29(5) (2008) 72-75.

[5] A.S. Haselhuhn, M.W. Buhr, B. Wijnen, et al. Structure-property relationships of common aluminum weld alloys utilized as feedstock for GMAW-based 3D metal printing, Materials Science & Engineering A, 673(2016) 511-523.

DOI: 10.1016/j.msea.2016.07.099

[6] J.H. Ouyang, H. Wang, R. Kovacevic, Rapid prototyping of 5356-aluminum alloy based on variable polarity gas tungsten arc welding: process control and microstructure, Materials and Manufacturing Process, 17(1) (2002) 103-124.

DOI: 10.1081/amp-120002801

[7] A. Horgar, H. Fostervoll, B. Nyhus, et al. Additive manufacturing using WAAM with AA5183 wire, Journal of Materials Processing Technology, 259(9) (2018) 68-74.

DOI: 10.1016/j.jmatprotec.2018.04.014

[8] J.Y. Bai, J.H. Wang, J.X. Shi, S.B. Lin, et al. Microstructure and mechanical properties of 4043-Al alloy thin-walled components produced by additive manufacturing with TIG welding, Welding & Joining, 10 (2015) 23-26.

[9] B.Q. Cong, J.L. Ding, Influence of CMT process on porosity of wire arc additive manufactured Al-Cu alloy, Rare Metal Materials and Engineering, 43(12) (2014) 3149-3153.

[10] H.Y. Sun, B.Q. Cong, Y. Su, et al. Geometry, microstructure and properties of wire + arc additive manufacturing Al-6.3Cu alloy deposits, Aeronautical Manufacturing Technology, 480(11) (2016) 36-42.

[11] T.T. Wang, Y.B. Zhang, Y.L. Xie, Status and development prospects of the wire arc additive manufacture technology, Electric Welding Machine, 47(8) (2017) 60-64.

[12] Z. Liu, X.M. Liu, C.G. Chen, Y.L. Zhu, Effect of reinforcement on morphology of eutectic silicon in Al-Si alloy matrix composites, Foundry, (10) (1999) 16-18.

[13] Y.C. Ma, Particle reinforced metal matrix composites, Jiangsu Metallurgy, 32(1) (2004) 54-57.

[14] L.J. Ai, Study on particle reinforced Al matrix composite, Lanzhou: Lanzhou University, (2007).

[15] S. Lakshmi, L. Lu, M., Gupta In-situ preparation of TiB2 reinforced Al based composites, Journal of Material Processing Technology, 73 (1998) 160-166.

DOI: 10.1016/s0924-0136(97)00225-2

[16] R.J. Wu, The development status and application potential of metal matrix composites, Aeronautical Manufacturing Technology, (3) (2001) 19-22.

[17] Y.H. Zhang, D.X. Zeng, Preparation and application of particle reinforced metal matrix composites, Journal of Hubei University of Automotive Technology, 16(4) (2002) 24-28.

[18] Q. Lian, Y. Wu, H.W. Wang, et al. Study on manufacturing processes and properties of TiB2 reinforced Al-Si composite by laser additive manufacturing, Hot Working Technology, 46(22) (2017) 113-117.

[19] Y.T. Shi, Q. Wang, G. Zhao, Effect of gadolinium and holmium metamorphism on the cast structure of aluminum-silicon-magnesium alloys, Chinese Rare Earths, 34(2) (2013) 47-51.

[20] F.X. Zhao, Y.J. Zhang, S.K. Yin, D.C. Li, Y.S. Li, Microfeature and Young' s modulus of cast TiB2/Al-Si composite fabricated by in-situ reaction, Foundry, 47(12) (1998) 13-16.

[21] H.G. Zhu, H.Z. Wang, S.Q. Wu, α-Al2O3 and TiB2 particles reinforced aluminum matrix composites fabricated by means of exothermic dispersion, Acta Metallurgica Sinica, 37(3) (2001) 321-324.

[22] P.L. Schaffer, L. Arnberg, K.D. Arne, Segregation of particles and its influence on the morphology of the eutectic silicon phase in Al-7 wt.% Si alloys, Scripta Materialia, 54 (2006) 677-682.

DOI: 10.1016/j.scriptamat.2005.10.016

[23] Y. Sun, J. Chen, G.X. Sun, Variation of the second-phase morphology and its influence on fracture behavior of Al-Si alloy, Journal of Southeast University, 20(1) (2004) 53-58.

[24] W.C. Li, Y.Z. Zou, J.M. Zeng, Influence of solution temperature and time on microstructure of ZL114A alloy, Materials for Mechanical Engineering, 32(11) (2008) 25-27.

[25] B.Y. Liu, Y. Sun, Effect of heat treatment on microstructure and performance of aluminum-silicon casting alloy, Automobile Technology, (4) (2004) 34-36, 39.

[26] Y.L. Wang, J.B. Zhang, J.F. Wang, Effect of solution heat treatment on silicon phase of eutectic Al-Si alloy, Light Alloy Fabrication Technology, 39(2) (2011) 47-51.

[27] V.P. Shikolaev, Heat treatment of cast alloy AK18 pistons, Metal Science and Heat Treatment, 29(6) (1987) 435-438.

DOI: 10.1007/bf00715881

[28] N.C. Liu, S.J. Liu, Z.X. Liu, Influences of modification and heat treatment on microstructure and mechanical properties of hypereutectic Al-20 %Si alloy, Foundry Technology, 30(8) (2009) 1022-1025.

[29] W.S. Hou, G. Chen, J. Xie, et al. Effect of modification and heat treatment on microstructure and wear properties of Al-Si-Fe/Al-20Si composite, Journal of Functional Materials, 43(22) (2012) 3126-3130.

[30] L. Shi, Y.Q. Wang, Y. Wang, et al. Effect of solution treatment on microstructure and mechanical properties of quasi eutectic Al-Si alloy, The Chinese Journal of Nonferrous Metals, , 22(12) (2012) 3372-3377.