http://repository.iitr.ac.in/handle/123456789/12823| Title: | Evolution of microstructure and texture in Ni49.4Ti 38.6Hf12 shape memory alloy during hot rolling |
| Authors: | Suresh, K. S. Kim D.-I. Bhaumik S.K. Suwas S. |
| Published in: | Intermetallics |
| Abstract: | This paper deals with the evolution of microstructure and texture during hot rolling of hafnium containing NiTi based shape memory alloy Ni 49.4Ti38.6Hf12. The formation of the R-phase has been associated with the precipitation of (Ti,Hf)2Ni phase. The crystallographic texture of the parent phase B2 as well as the product phases R and B19′ have been determined. It has been found that the variant selection during the B2 → R phase transformation is quite strong compared to the case of the B2 → B19′ transformation. During deformation, the texture of the austenite phase evolves with strong Goss and Bs components. After transformation to martensitic structure, it gives rise to a [011] RD fiber. Microstructure and texture studies reveal the occurrence of partial dynamic recrystallization during hot rolling. Large strain heterogeneities that occur surrounding (Ti,Hf)2Ni precipitates are relieved through extended dynamic recovery instead of particle stimulated nucleation. © 2013 Elsevier Ltd. All rights reserved. |
| Citation: | Intermetallics (2013), 42(): 1-8 |
| URI: | https://doi.org/10.1016/j.intermet.2013.04.009 http://repository.iitr.ac.in/handle/123456789/12823 |
| Issue Date: | 2013 |
| Keywords: | B. Texture B. Twinning C. Rolling D. Grain-boundary character distribution D. Microstructure |
| ISSN: | 9669795 |
| Author Scopus IDs: | 54882593400 55742954800 7004351295 7003627765 |
| Author Affiliations: | Suresh, K.S., Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka 560 012, India Kim, D.-I., High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, South Korea Bhaumik, S.K., Materials Science Division, Council of Scientific and Industrial Research (CSIR), National Aerospace Laboratory, Bangalore 560 017, India Suwas, S., Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka 560 012, India |
| Funding Details: | Use of Central facility for X-ray and Advanced facility for microscopy and microanalysis (AFMM) at IISc are acknowledged. One of the authors KSS would like to acknowledge the support that has been provided by Korea Institute of Science and Technology , Seoul. (Grant No. 2E22131 ). |
| Corresponding Author: | Suwas, S.; Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka 560 012, India; email: satyamsuwas@gmail.com |
| Appears in Collections: | Journal Publications [MT] |
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