Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Development of Ultrafine-Grained Aluminum Tubes Using Severe Plastic Deformation Process

강소성 가공 공정을 이용한 튜브 형상 재료의 결정립 미세화에 대한 연구

  • Published : 2009.10.01
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Abstract

A unique process was developed to improve the mechanical properties of a circular tube. In this proposed process, a large amount of strain is applied to the wall of tube, leading to grain refinement in the material. In order to investigate characteristics of microstructural evolution such as the distribution of grain size and misorientation angle during the process, an EBSD OIM analysis was carried out. The analysis confirms that the proposed process can very effectively produce a circular tube with ultrafine-grains.

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References

  1. Zhilyaev, A. P., Nurislamova, G. V., Kim, B. -K., Baro, M. D., Szpunar, J. A. and Langdon, T. G., 2003, 'Experimental Parameters Influencing Grain Refinement and Microstructural Evolution During High-Pressure Torsion,' Acta Mater., Vol. 51, No. 3, pp. 753-765 https://doi.org/10.1016/S1359-6454(02)00466-4
  2. Saito, Y., Utsunomiya, H., Sakai, T. and Hong, R. G., 1998, 'Ultra-Fine Grained Bulk Aluminum Produced by Accumulative Roll-Bonding (ARB) Process,' Scripta Mater., Vol. 39, No. 9, pp. 1221-1227 https://doi.org/10.1016/S1359-6462(98)00302-9
  3. Saito, Y., Utsunomiya, H., Tsuji, N. and Sakai, T., 1999, 'Novel Ultra-High Straining Process for Bulk Materials-Development of the Accumulative Roll- Bonding (ARB) Process,' Acta Mater., Vol. 47, No. 2, pp. 579-583 https://doi.org/10.1016/S1359-6454(98)00365-6
  4. Tsuji, N., Saito, Y., Utsunomiya, H. and Tanigawa, S., 1999, 'Ultra-Fine Grained Bulk Steel Produced by Accumulative Roll-Bonding (ARB) Process. Scripta Mater., Vol. 40, No. 7, pp. 795-800 https://doi.org/10.1016/S1359-6462(99)00015-9
  5. Iwahashi, Y., Horita, Z., Nemoto M. and Landon T. G., 1998, 'The Process of Grain Refinement in Equal- Channel Angular Pressing,' Acta Mater., Vol. 46, No. 9, pp. 3317-3331 https://doi.org/10.1016/S1359-6454(97)00494-1
  6. Iwahashi, Y., Wang, J., Horita, Z., Nemoto, M. and Langdon, T. G., 1996, 'Principle of Equal-Channel Angular Pressing for the Processing of Ultra-Fine Grained Materials,' Scripta Mater., Vol. 35, No. 2, pp. 143-146 https://doi.org/10.1016/1359-6462(96)00107-8
  7. Nakashima, K., Horita, Z., Nemoto, M. and Langdon, T. G., 2000, 'Development of a Multi-Pass Facility for Equal-Channel Angular Pressing to High Total Strains,' Mater. Sci. and Eng., Vol. A281, No. 1-2, pp. 82-87 https://doi.org/10.1016/S0921-5093(99)00744-3
  8. Iwahashi, Y., Horita, Z., Nemoto, M., and Langdon T. G., 1997, 'An Investigation of Microstructural Evolution Dring Equal-Channel Angular Pressing,' Acta Mater., Vol. 45, No. 11, pp. 4733-4741 https://doi.org/10.1016/S1359-6454(97)00100-6
  9. Sun, P. L., Kao, P. W. and Chang, C. P., 2000, 'Characteristics of Submicron Grained Structure Formed in Aluminum by Equal Channel Angular Extrusion,' Mater. Sci. and Eng., Vol. A283, No. 1-2, pp. 82-85 https://doi.org/10.1016/S0921-5093(99)00800-X
  10. Gholinia, A., Prangnell, P. B. and Markushev, M. V., 2000, 'The Effect of Strain Path on the Development of Deformation Structures in Severely Deformed Aluminium Alloys Processed by ECAE,' Acta Mater., Vol. 48, No. 5, pp. 1115-1130 https://doi.org/10.1016/S1359-6454(99)00388-2
  11. Kim, K. J., Yang, D. Y. and Yoon, J. W., 2008, 'Investigation of Microstructure Characteristics of Commercially Pure Aluminum During Equal Channel Angular Extrusion,' Mater. Sci. and Eng., Vol. A485, No. 1-2, pp. 621-626 https://doi.org/10.1016/j.msea.2007.08.038
  12. Nakashima, K., Horita Z., Nemoto M. and Langdon T. G., 1998, 'Influence of Channel Angle on the Development of Ultrafine Grains in Equal-Channel Angular Pressing,' Acta Mater., Vol. 46, No. 5, pp. 1589-1599 https://doi.org/10.1016/S1359-6454(97)00355-8
  13. Kim, K. J., 2007, 'Investigation into the Texture Evolution and Deformation Induced Material Properties in the Aluminum Extrusion Processes,' Doctoral Thesis, KAIST, Daejeon, pp. 126
  14. Huang, J. C., Hsiao, I. C., Wang, T. D. and Lou, B. Y., 2000, 'EBSD Study on Grain Boundary Characteristics in Fine-Grained Al Alloys,' Scripta Mater., Vol. 43, No. 3, pp. 213-220 https://doi.org/10.1016/S1359-6462(00)00393-6