Effect of TiB₂ content on microstructure and properties of in situ Ti-TiB composites

Abstract

This study determined the optimal concentration of titanium diboride (TiB₂) particles for the development of in situ titanium–titanium boride (Ti–TiB) metal matrix composites (MMCs) prepared by a conventional powder metallurgy route to be used for industrial applications. The effect of concentration of TiB2 particles was studied by reinforcing TiB2 powder in different mass fractions (2wt%, 5wt%, 10wt%, and 20wt%) into pure Ti powder during the fabrication process. The MMCs were sintered at high temperatures under vacuum. The transmission electron microscopy (TEM) results revealed the formation of needle-shaped TiB whiskers, indicating that in situ reaction occurred during vacuum sintering of the powder compacts. All the composite samples had a high sintered density, and the hardness of the composites increased with an increase in the mass fraction of reinforcement. Mechanical and tribological properties such as flexural strength, impact, and wear properties were determined and found to be dependent on the mass fraction of the reinforcement. However, the mechanism for the in situ reaction needs further investigation by high-energy in situ X-ray diffraction techniques.

Keywords

titanium matrix composites / powder metallurgy / X-ray diffraction / mechanical properties / wear

References

[1] K.K. Chawla, Metal Matrix Composites, R.W. Cahn, P. Haasen and E.J. Kramer, eds., Willey and Sons, 2006.

[2] Chawla KK. Composite Materials: Science and Engineering, 2012

[3] Hayat MD, Singh H, He Z, Cao P. Titanium metal matrix composites: An overview. Composites Part A, 2019, 121, 418.

[4] Enomoto Y, Yamamoto T. New materials in automotive tribology. Tribol. Lett., 1998, 5(1): 13.

[5] Allison JE, Cole GS. Metal-matrix composites in the automotive industry: Opportunities and challenges. JOM, 1993, 45(1): 19.

[6] Smith PR, Froes FH. Developments in titanium metal matrix composites. JOM, 1984, 36(3): 19.

[7] Ward-Close CM, Winstone MR, Partridge PG. Developments in the processing of titanium alloy metal matrix composites. Mater. Des., 1994, 15(2): 67.

[8] Ibrahim IA, Mohamed FA, Lavernia E J. Particulate reinforced metal matrix composites—a review. J. Mater. Sci., 1991, 26(5): 1137.

[9] Geng K, Lu WJ, Qin YX, Zhang D. In situ preparation of titanium matrix composites reinforced with TiB whiskers and Y2O3 particles. Mater. Res. Bull., 2004, 39(6): 873.

[10] Geng L, Ni DR, Zhang J, Zheng ZZ. Hybrid effect of TiBw and TiCp on tensile properties of in situ titanium matrix composites. J. ^Alloys Compd., 2008, 463(1–2): 488.

[11] Godfrey TMT, Goodwin PS, Ward-Close CM. Production of titanium particulate metal matrix composite by mechanical milling. Mater. Sci. Technol., 2000, 16(7–8): 753.

[12] Li SF, Kondoh K, Imai H, Chen B, Jia L, Umeda J, Fu YB. Strengthening behavior of in situ-synthesized (TiC–TiB)/Ti composites by powder metallurgy and hot extrusion. Mater. Des., 2016, 95, 127.

[13] Zhang ZH, Shen XB, Wang FC, Lee SK. A new rapid route for in situ synthesizing monolithic TiB ceramic. J. Am. Ceram. Soc., 2011, 94(9): 2754.

[14] Li DX, Ping DH, Lu YX, Ye HQ. Characterization of the microstructure in TiB-whisker reinforced Ti alloy matrix composite. Mater. Lett., 1993, 16(6): 322.

[15] Soboyejo WO, Lederich RJ, Sastry SML. Mechanical behavior of damage tolerant TiB whisker-reinforced in situ titanium matrix composites. Acta Metall. Mater., 1994, 42(8): 2579.

[16] Zadra M, Girardini L. High-performance, low-cost titanium metal matrix composites. Mater. Sci. Eng. A, 2014, 608, 155.

[17] Gangopadhyay AK, Margrave JL. Thermodynamic properties of inorganic substances. VI. The high temperature heat contents of chromel-P and alumel. J. Chem. Eng. Data, 1963, 8(2): 204.

[18] Panda KB, Ravi Chandran KS. Synthesis of ductile titanium–titanium boride (Ti–TiB) composites with a beta- titanium matrix: The nature of TiB formation and composite properties. Metall. Mater. Trans. A, 2003, 34(6): 1371.

[19] Attar H, Bönisch M, Calin M, Zhang LC, Scudino S, Eckert J. Selective laser melting of in situ titanium–titanium boride composites: Processing, microstructure and mechanical properties. Acta Mater., 2014, 76, 13.

[20] Godfrey TMT, Wisbey A, Goodwin PS, Bagnall K, Ward-Close CM. Microstructure and tensile properties of mechanically alloyed Ti–6A1–4V with boron additions. Mater. Sci. Eng. A, 2000, 282(1–2): 240.

[21] Zhang CJ, Qu JP, Wu J, Zhang SZ, Han JC, Hayat MD, Cao P. A titanium composite with dual reinforcements of micrometer sized TiB and submicrometer sized Y2O3. Mater. Lett., 2018, 233, 242.

[22] Han JC, Lü ZD, Zhang CJ, Zhang SZ, Zhang HZ, Lin P, Cao P. The microstructural characterization and mechanical properties of 5 vol.% (TiBw + TiCp)/Ti composite produced by open-die forging. Metals, 2018, 8(7): 485.

[23] Koo MY, Park JS, Park MK, Kim KT, Hong SH. Effect of aspect ratios of in situ formed TiB whiskers on the mechanical properties of TiBw/Ti–6Al–4V composites. Scripta Mater., 2012, 66(7): 487.

[24] De Graef M, Löfvander JPA, McCullough C, Levi CG. The evolution of metastable Bf borides in a TiAlB alloy. Acta Metall. Mater., 1992, 40(12): 3395.

[25] Lundström T. Matkovich VI, Samsonov GV, Hagenmuller P, Lundstrom T. Transition metal borides. Boron and Refractory Borides, 1977 351.

[26] Fan Z, Guo ZX, Cantor B. The kinetics and mechanism of interfacial reaction in sigma fibre-reinforced Ti MMCs. Composites Part A, 1997, 28(2): 131.

[27] Kim IY, Choi BJ, Kim YJ, Lee YZ. Friction and wear behavior of titanium matrix (TiB + TiC) composites. Wear, 2011, 271(9–10): 1962.

[28] Selva Kumar M, Chandrasekar P, Chandramohan P, Mohanraj M. Characterisation of titanium–titanium boride composites processed by powder metallurgy techniques. Mater. Charact., 2012, 73, 43.

[29] Zhang JY, Ke WX, Ji W, Fan Z, Wang WM, Fu ZY. Microstructure and properties of in situ titanium boride (TiB)/titanium (TI) composites. Mater. Sci. Eng. A, 2015, 648, 158.

[30] Feng HB, Jia DC, Zhou Y. Spark plasma sintering reaction synthesized TiB reinforced titanium matrix composites. Composites Part A, 2005, 36(5): 558.

[31] Kim JS, Lee KM, Cho DH, Lee YZ. Fretting wear characteristics of titanium matrix composites reinforced by titanium boride and titanium carbide particulates. Wear, 2013, 301(1–2): 562.

[32] Kang N, Coddet P, Liu Q, Liao HL, Coddet C. In-situ TiB/near a Ti matrix composites manufactured by selective laser melting. Addit. Manuf., 2016, 11, 1.

[33] Khanlari K, Ramezani M, Kelly P, Cao P, Neitzert T. Reciprocating sliding wear behavior of 60NiTi as compared to 440C steel under lubricated and unlubricated conditions. Tribol. Trans., 2018, 61, 1.