Microstructure and Mechanical Properties of TiN/Inconel 718 Composites Fabricated by Selective Laser Melting
Received date: 2020-12-02
Revised date: 2021-02-04
Online published: 2021-03-01
Supported by
Project of Jilin Province Science and Technology Development Plan(20200401034GX);Project of Jilin Province Development and Reform Commission Industrial Technology Research and Development Special(2020C029-1);Fundamental Research Funds for the Central Universities, Jilin University(45120031B004)
The Inconel 718 alloy has become a remarkable candidate material for aerospace jet engines, turbine blades, and some other elevated temperature components owing to its superior tensile strength, anticorrosion and thermal performance. Moreover, TiN ceramic particles with high hardness and chemical stability have been realized to significantly improve the mechanical properties of the alloy matrix at a low content. Accordingly, in this work, the Inconel 718 (IN718) alloy and TiN/IN718 composite were fabricated by the optimized selective laser melting (SLM) process. Further, the microstructures and mechanical properties of the IN718 alloy and TiN/IN718 composite under heat treatments were investigated, respectively. The results show that the TiN particles were highly combined with the matrix, and a transition layer with 0.3 μm was formed in the SLM-fabricated TiN/IN718 specimens. Additionally, the microhardness and tensile strength were significantly improved compared with IN718 alloy (39 HV0.2, 74 MPa, respectively). After the double aging and solution aging (SA) treatments, the number of crack initiation sources was increased owing to the precipitation of the δ phase, which deteriorated the tensile strength of the TiN/IN718 composite. After the homogenization + SA (HSA) treatment, the composite was completely recrystallized, and an appropriate amount of needle- and plate-like δ phases precipitated at the grain boundaries. Hence, the TiN/IN718 composite after the HSA treatment exhibited optimally comprehensive mechanical properties.
Key words： selective laser melting; Inconel 718; TiN particle; composite; heat treatment
Wenquan WANG , Suyu WANG , Fei CHEN , Xinge ZHANG , Yuxin XU . Microstructure and Mechanical Properties of TiN/Inconel 718 Composites Fabricated by Selective Laser Melting[J]. Acta Metall Sin, 2021 , 57(8) : 1017 -1026 . DOI: 10.11900/0412.1961.2020.00485
| 1 | Abe F, Osakada K, Shiomi M, et al. The manufacturing of hard tools from metallic powders by selective laser melting [J]. J. Mater. Process. Technol., 2001, 111: 210 |
| 2 | Delcuse L, Bahi S, Gunputh U, et al. Effect of powder bed fusion laser melting process parameters, build orientation and strut thickness on porosity, accuracy and tensile properties of an auxetic structure in IN718 alloy [J]. Addit. Manuf., 2020, 36: 101339 |
| 3 | Yang Y, Li X, Khonsari M M, et al. On enhancing surface wear resistance via rotating grains during selective laser melting [J]. Addit. Manuf., 2020, 36: 101583 |
| 4 | Trosch T, Str??ner J, V?lkl R, et al. Microstructure and mechanical properties of selective laser melted Inconel 718 compared to forging and casting [J]. Mater. Lett., 2016, 164: 428 |
| 5 | Zhang D Y, Feng Z, Wang C J, et al. Comparison of microstructures and mechanical properties of Inconel 718 alloy processed by selective laser melting and casting [J]. Mater. Sci. Eng., 2018, A724: 357 |
| 6 | Huang W, Yang J J, Yang H H, et al. Heat treatment of Inconel 718 produced by selective laser melting: Microstructure and mechanical properties [J]. Mater. Sci. Eng., 2019, A750: 98 |
| 7 | Moussaoui K, Rubio W, Mousseigne M, et al. Effects of selective laser melting additive manufacturing parameters of Inconel 718 on porosity, microstructure and mechanical properties [J]. Mater. Sci. Eng., 2018, A735: 182 |
| 8 | Hu Y L, Lin X, Zhang S Y, et al. Effect of solution heat treatment on the microstructure and mechanical properties of Inconel 625 superalloy fabricated by laser solid forming [J]. J. Alloys Compd., 2018, 767: 330 |
| 9 | Yao X L, Moon S K, Lee B Y, et al. Effects of heat treatment on microstructures and tensile properties of IN718/TiC nanocomposite fabricated by selective laser melting [J]. Int. J. Precis. Eng. Manuf., 2017, 18: 1693 |
| 10 | Xu F J, Lv Y H, Liu Y X, et al. Microstructural evolution and mechanical properties of Inconel 625 alloy during pulsed plasma arc deposition process [J]. J. Mater. Sci. Technol., 2013, 29: 480 |
| 11 | Cao G H, Sun T Y, Wang C H, et al. Investigations of γ', γ'' and δ precipitates in heat-treated Inconel 718 alloy fabricated by selective laser melting [J]. Mater. Charact., 2018, 136: 398 |
| 12 | Nguyen Q B, Luu D N, Nai S M L, et al. The role of powder layer thickness on the quality of SLM printed parts [J]. Arch. Civ. Mech. Eng., 2018, 18: 948 |
| 13 | Nadammal N, Cabeza S, Mishurova T, et al. Effect of hatch length on the development of microstructure, texture and residual stresses in selective laser melted superalloy Inconel 718 [J]. Mater. Des., 2017, 134: 139 |
| 14 | Schneider J, Lund B, Fullen M. Effect of heat treatment variations on the mechanical properties of Inconel 718 selective laser melted specimens [J]. Addit. Manuf., 2018, 21: 248 |
| 15 | Chen L, Sun Y Z, Li L, et al. Effect of heat treatment on the microstructure and high temperature oxidation behavior of TiC/Inconel 625 nanocomposites fabricated by selective laser melting [J]. Corros. Sci., 2020, 169: 168606 |
| 16 | Nguyen Q B, Zhu Z, Chua B W, et al. Development of WC-Inconel composites using selective laser melting [J]. Arch. Civ. Mech. Eng., 2018, 18: 1410 |
| 17 | Zhang B C, Bi G J, Nai S, et al. Microhardness and microstructure evolution of TiB2 reinforced Inconel 625/TiB2 composite produced by selective laser melting [J]. Opt. Laser Technol., 2016, 80: 186 |
| 18 | Tanprayoon D, Srisawadi S, Sato Y, et al. Microstructure and hardness response of novel 316L stainless steel composite with TiN addition fabricated by SLM [J]. Opt. Laser Technol., 2020, 129: 106238 |
| 19 | Chen Q C, Wu G Z, Li D S, et al. Understanding the unusual friction behavior of TiN films in vacuum [J]. Tribol. Int., 2019, 137: 379 |
| 20 | Zhang D Y, Niu W, Cao X Y, et al. Effect of standard heat treatment on the microstructure and mechanical properties of selective laser melting manufactured Inconel 718 superalloy [J]. Mater. Sci. Eng., 2015, A644: 32 |
| 21 | Blackwell P L. The mechanical and microstructural characteristics of laser-deposited IN718 [J]. J. Mater. Process. Technol., 2005, 170: 240 |
| 22 | Zhao Y, Guan K, Yang Z Q, et al. The effect of subsequent heat treatment on the evolution behavior of second phase particles and mechanical properties of the Inconel 718 superalloy manufactured by selective laser melting [J]. Mater. Sci. Eng., 2020, A794: 139931 |
| 23 | Liu F C, Lin X, Yang G L, et al. Microstructure and residual stress of laser rapid formed Inconel 718 nickel-base superalloy [J]. Opt. Laser Technol., 2011, 43: 208 |
| 24 | Xiao H, Li S M, Xiao W J, et al. Effects of laser modes on Nb segregation and Laves phase formation during laser additive manufacturing of nickel-based superalloy [J]. Mater. Lett., 2017, 188: 260 |
| 25 | Cao Y, Bai P C, Liu F, et al. Effect of the solution temperature on the precipitates and grain evolution of IN718 fabricated by laser additive manufacturing [J]. Materials (Basel), 2020, 13: 340 |
| 26 | Desvallees Y, Bouzidi M, Bois F, et al. Delta phase in Inconel 718: Mechanical properties and forging process requirements [A].Superalloys 718, 625, 706 and Various Dericatives [C]. Warrendale, PA: TMS, 1994: 281 |
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