Cold Compaction behavior of nano and micro aluminum powder under high
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
In this study, micro-sized and nano-sized pure aluminum (Al) powders were compressed by unidirectional pressure at room temperature. Although neither type of Al bulk was heated, they had a high relative density and improved mechanical properties. The microstructural analysis showed a difference in the process of densification according to particle size, and the mechanical properties were measured by the Vickers hardness test and the nano indentation test. The Vickers hardness of micro Al and nano Al fabricated in this study was five to eight times that of ordinary Al. The grain refinement effect was considered to be one of the strengthening factors, and the Hall–Petch equation was introduced to analyze the improved hardness caused by grain size reduction. In addition, the effect of particle size and dispersion of aluminum oxide in the bulk were additionally considered. Based on these results, the present study facilitates the examination of the effect of particle size on the mechanical properties of compacted bulk fabricated by the powder metallurgy method and suggests the possible way to improve the mechanical properties of nano-crystalline powders.
Abstract
In this study, micro-sized and nano-sized pure aluminum (Al) powders were compressed by unidirectional pressure at room temperature. Although neither type of Al bulk was heated, they had a high relative density and improved mechanical properties. The microstructural analysis showed a difference in the process of densification according to particle size, and the mechanical properties were measured by the Vickers hardness test and the nano indentation test. The Vickers hardness of micro Al and nano Al fabricated in this study was five to eight times that of ordinary Al. The grain refinement effect was considered to be one of the strengthening factors, and the Hall–Petch equation was introduced to analyze the improved hardness caused by grain size reduction. In addition, the effect of particle size and dispersion of aluminum oxide in the bulk were additionally considered. Based on these results, the present study facilitates the examination of the effect of particle size on the mechanical properties of compacted bulk fabricated by the powder metallurgy method and suggests the possible way to improve the mechanical properties of nano-crystalline powders.
참고문헌 (20)
- Zhao, N., "The Effect of Mechanical Alloying on Sic Distribution and the Properties of 6061 Aluminum Composite", Journal of Material Processing and Technology, 170, pp.586~592 (2005)
- Kwon, H., "Investigation of Carbon Nanotube Reinforced Aluminum Matrix Composite Materials", Composites Science and Technology, 70, pp.546~550 (2010)
- Park, K., "Fabrication and Characterization of Al-SUS316L Composite Materials Manufactured by the Spark Plasma Sintering Process", Materials Science and Engineering A, 691, pp.8~15 (2017)
- Meyers, M. A., "Mechanical Properties of Nanocrystalline Materials", Progress in Materials Science, 51(4), pp.427~556 (2006)
- Hirayama, Y., "Cold Welding Behavior of Fine Bare Aluminum Powders Prepared by New Low Oxygen Induction Thermal Plasma System", Journal of Alloys and Compounds, 768, pp.608~612 (2018)
- Ye, J., "Bulk Nanocrystalline Aluminum 5083 Alloy Fabricated by a Novel Technique : Cryomilling and Spark Plasma Sintering", Metallurgical and Materials Transactions A, 37, pp.2569~2579 (2006)
- Fang, Z. Z., "Synthesis, Sintering and Mechanical Properties of Nanocrystalline Cemented Tungsten Carbide-A Review", International Journal of Refractory Metals & Hard Materials, 27, pp.288~299 (2008)
- Grasso, S., "Highly Transparent α-alumina Obtained by Low Cost High Pressure SPS", Ceramic International, 39, pp.3243~3248 (2013)
- Hatch, J.E., "Aluminum: Properties and Physical Metallurgy", pp.424~ (1984), American Society for Metals
- Srivatsan, T. S., "An Investigation of the Influence of Powder Particle Size on Microstructure and Hardness of Bulk Samples of Tungsten Carbide", Powder Technology, 122, pp.54~60 (2002)
- Smith, William F., "Foundations of Materials Science and Engineering" (2006), McGraw-Hill
- Furukawa, M., "Structural Evolution and the Hall-Petch Relationship in an Al Mg Li Zr Alloy with Ultra-fine Grain Size", Acta Materiallia, 45, pp.4751~4757 (1997)
- Sato, Y. S., "Microstructural Factors Governing Hardness in Friction-stir Welds of Solid-solutionhardened Al Alloys", Metallurgical and Materials Transactions A, 32, pp.3033~3042 (2001)
- Liu, Z. C., "Effects of Nb and Al on the Microstructures and Mechanical Properties of High Nb Containing TiAl Base Alloys", Intermetallics, 10, pp.653~659 (2002)
- Jang, J. S. C., "The Hall-Petch Relationship in Nanocrystalline Iron Produced by Ball Milling", Scripta Metallurgica et Metarialia, 24, pp.1599~1604 (1990)
- Farhat, Z. N., "Effect of Grain Size on Friction and Wear of Nanocrystalline Aluminum", Materials Science and Engineering A, 206, pp.302~313 (1996)
- "Free Encyclopedia" (2019)[URL]
- Rahimian, M., "Investigation of Particle Size and Amount of Alumina on Microstructure and Mechanical Properties of Al Matrix Composite Made by Powder Metallurgy", Materials Science and Engineering A, 527, pp.1031~1038 (2010)
- 권한상, "Spark Plasma Sintering Behavior of Pure Aluminum Depending on Various Sintering Temperatures", Metals and Materials International, 16(1), pp.71~75 (2010), 대한금속·재료학회
- Voroshtov, A. B., "Oxidation of Nano-sized Aluminum Powders", Thermochimia Acta, 636, pp.48~56 (2016)