Implication of grain boundary engineering on high temperature hot corrosion of alloy 617
- Authors
- Deepak, K.; Mandal, Sumantra; Athreya, C. N.; Kim, Dong-Ik; de Boer, B.; Sarma, V. Subramanya
- Issue Date
- 2016-05
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- CORROSION SCIENCE, v.106, pp.293 - 297
- Abstract
- The role of grain boundary engineering (GBE) on high-temperature hot corrosion behavior of alloy 617 was evaluated by exposing both the as-received (AR) and GBE specimens in a salt-mixture of (75% Na2SO4 + 20% NaCl + 5% V2O5) at 1273 K for 24 h. The AR specimen having continuous network of random high angle grain boundaries (HAGBs) has undergone hot corrosion and substantial depletion/segregation of alloying elements through the entire cross section. The GBE specimen exhibited significantly reduced hot corrosion and depletion/segregation of alloying elements. This is attributed to the high fraction of 3-CSL triple junctions which break the percolation in the random HAGBs network. (C) 2016 Elsevier Ltd. All rights reserved.
- Keywords
- SUPERALLOY; BEHAVIOR; SENSITIZATION; RESISTANT; STRAIN; WATER; SUPERALLOY; BEHAVIOR; SENSITIZATION; RESISTANT; STRAIN; WATER; Superalloys; SEM; High temperature corrosion; Segregation
- ISSN
- 0010-938X
- URI
- https://pubs.kist.re.kr/handle/201004/124126
- DOI
- 10.1016/j.corsci.2016.01.019
- Appears in Collections:
- KIST Article > 2016
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