Effect of nano-sized B₄C addition on the mechanical properties of ZA27 composites

Abstract

In order to understand the influence of nano-sized B₄C additive on ZA27 alloy, mechanical and physical properties of ZA27-B₄C nanocomposites were investigated in terms of B₄C content. While physical properties were determined in terms of microstructural studies, density and porosity tests, mechanical properties were determined in terms of ultimate tensile strength (UTS) and hardness experiments. Morphological and microstructural studies were carried out with scanning electron microscopy (SEM). The experimental results indicate that nano-sized B₄C can be used to enhance the mechanical properties of ZA27 alloy effectively. The highest mechanical performance can be obtained at ZA27-0.5% B₄C (in weight) nanocomposite with values of tensile strength (247 MPa) and hardness (141,18 BH) and low partial porosity (0.5%). After a pick point, increasing B₄C ratio may cause the formation of agglomeration in grain boundaries, that’s why density, tensile strength, and hardness values are declined.

Keywords

metal matrix nanocomposite / ZA27 alloy / hot pressing / powder metallurgy

References

[1] Zhang Z, Topping T, Li Y, et al. Mechanical Behavior of Ultrafine-grained Al Composites Reinforced with B₄C Nanoparticles[J]. Scripta Materialia, 2011, 65: 652-625.

[2] Srivatsana TSU, Narendrab N, Troxellc JD. Tensile Deformation and Fracture Behavior of an Oxidedispersion Strengthened Copper Alloy[J]. Materials and Design, 1999

[3] Zhou DS, Zhang DL, Kong C, et al. Factors Controlling the Tensile Properties of Ultrafine Structured Cu-5vol%Al₂O₃ Nanocomposite Prepared by High Energy Mechanical Milling and Powder Compact Extrusion[J]. Materials Science and Engineering: A., 2013, 584: 67-72.

[4] Bian GE, Wang LL, Wu J, et al. Effects of Electrolytes on the Growth Behavior, Microstructure and Tribological Properties of Plasma Electrolytic Oxidation Coatings on a ZA27 Alloy[J]. Surf. Coat Tech., 2015, 277: 251-257.

[5] Sahu S, Goel MD, Mondal DP, et al. High Temperature Compressive Deformation Behavior of ZA27-SiC Foam[J]. Mat. Sci. Eng. a-Struct., 2014, 607: 162-172.

[6] Mondal DP, Goel MD, Bagde N, et al. Closed Cell ZA27-SiC Foam Made Through Stir-casting Technique[J]. Materials & Design, 2014, 57: 315-324.

[7] Zhu YH, Lee WB, Mei Z, et al. Structural Evolution in Films of Alloy Zn₇₀Al₂₇Cu₃ (ZA27) [J]. Appl. Surf. Sci., 2005, 242: 236-244.

[8] Bobic B, Bajat J, Acimovic-Pavlovic Z, et al. Corrosion Behaviour of Thixoformed and Heat-treated ZA27 Alloys in NaCl Solution[J]. T. Nonferr. Metal. Soc., 2013, 23: 931-941.

[9] Gervais E, Barnhurst RJ, Loong CA. An Analysis of Selected Properties of Za Alloys[J]. Jom-J. Min. Met. Mat. S., 1985, 37: 43-47.

[10] Kubel EJ. Expanding Horizons for Za Alloys[J]. Adv. Mater. Process., 1987, 132: 51-57.

[11] Zhu YH, Hernandez RM, Banos L. Phase Decomposition in Extruded Zn-Al Based Alloy[J]. J Mater Sci., 1999, 34: 3653-3658.

[12] Lehuy H, Lesperance G. Aging Characteristics of Dendritic and Non-Dentritic (Stir-Cast) Zn-Al Alloys (Za-27) [J]. Cim. Bull., 1988, 81: 76-87.

[13] Liu Y, Li HY, Jiang HF, et al. Effects of Heat Treatment on Microstructure and Mechanical Properties of ZA27 Alloy[J]. T. Nonferr. Metal Soc., 2013, 23: 642-649.

[14] Abou El-khair MT, Lotfy A, Daoud A, et al. Microstructure, Thermal Behavior and Mechanical Properties of Squeeze Cast SiC, ZrO₂ or C Reinforced ZA27 Composites[J]. Mat. Sci. Eng. a-Struct., 2011, 528: 2353-2362.

[15] Sharma SC, Girish BM, Somashekar DR, et al. Mechanical Properties and Fractography of Zircon-particle-reinforced ZA-27 Alloy Composite Materials[J]. Compos Sci Technol., 1999, 59: 1805-1812.

[16] Torralba JM, da Costa CE, Velasco F. P/M Aluminum Matrix Composites: An Overview[J]. J. Mater. Process Tech., 2003, 133: 203-206.

[17] Fogagnolo JB, Ruiz-Navas EM, Robert MH, et al. The Effects of Mechanical Alloying on the Compressibility of Aluminium Matrix Composite Powder[J]. Mat. Sci. Eng. a-Struct., 2003, 355: 50-55.

[18] Liu CH. Structure and Properties of Boron Carbide with Aluminum Incorporation[J]. Mat. Sci. Eng. B-Solid., 2000, 72: 23-26.

[19] Afizadeh M, Paydar MH, Jazi FS. Structural Evaluation and Mechanical Properties of Nanostructured Al/B₄C Composite Fabricated by ARB Process[J]. Compos. Part B-Eng., 2013, 44: 339-343.

[20] Tjong SC. Novel Nanoparticle-reinforced Metal Matrix Composites with Enhanced Mechanical Properties[J]. Adv. Eng. Mater., 2007, 9: 639-652.

[21] Varol T, Canakci A. Effect of Weight Percentage and Particle Size of B₄C Reinforcement on Physical and Mechanical Properties of Powder Metallurgy Al2024-B₄C Composites[J]. Met. Mater. Int., 2013, 19: 1227-1234.

[22] Gupta M, Lai MO, Saravanaranganathan D. Synthesis, Microstructure and Properties Characterization of Disintegrated Melt Deposited Mg/SiC Composites[J]. J. Mater. Sci., 2000, 35: 2155-2165.

[23] Hassan SF, Gupta A. Development of High Performance Magnesium Nano-composites using Nano-Al₂O₃ as Reinforcement[J]. Mat. Sci. Eng. a-Struct., 2005, 392: 163-168.

[24] Chawla N, Shen YL. Mechanical Behavior of Particle Reinforced Metal Matrix Composites[J]. Adv. Eng. Mater., 2001, 3: 357-370.