The significance of self-annealing in two-phase alloys processed by high-pressure torsion
- Title
- The significance of self-annealing in two-phase alloys processed by high-pressure torsion
- Author
- Megumi Kawasaki
- Issue Date
- 2014-06
- Publisher
- Institute of Physics Publishing
- Citation
- In: IOP Conference Series: Materials Science and Engineering, 6th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD 2014. (IOP Conference Series: Materials Science and Engineering, 2014, 63(1))
- Abstract
- The Zn-22% Al eutectoid alloy and the Pb-62% Sn eutectic alloy were processed by high-pressure torsion (HPT) over a range of experimental conditions. Both alloys exhibit similar characteristics with significant grain refinement after processing by HPT but with a reduction in the hardness values by comparison with the initial unprocessed conditions. After storage at room temperature for a period of time, it is shown that the microhardness of both alloys gradually recovers to close to the initial unprocessed values. Electron backscatter diffraction (EBSD) measurements on the Pb-Sn alloy suggest that the self-recovery behaviour is correlated with the fraction of high-angle grain boundaries (HAGBs) after HPT processing. Thus, high fractions of HAGBs occur immediately after processing and this favours grain boundary migration and sliding which is important in the self-annealing and recovery process. Conversely, the relatively lower fractions of HAGBs occurring after annealing at room temperature are not so conducive to easy migration and sliding.
- URI
- http://iopscience.iop.org/article/10.1088/1757-899X/63/1/012126/metahttp://hdl.handle.net/20.500.11754/46765
- ISSN
- 1757-899X; 1757-8981
- DOI
- 10.1088/1757-899X/63/1/012126
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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