Implication of grain boundary engineering on high temperature hot corrosion of alloy 617

被引：75
作者：
Deepak, K. [1 ]
Mandal, Sumantra [2 ]
Athreya, C. N. [1 ]
Kim, Dong-Ik [3 ]
de Boer, B. [4 ]
Sarma, V. Subramanya [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
[2] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
[3] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 02792, South Korea
[4] VDM Met GmbH, Plettenberger Str 2, D-58791 Werdohl, Germany
来源：
CORROSION SCIENCE | 2016年 / 106卷
关键词：
Superalloys; SEM; High temperature corrosion; Segregation; SUPERALLOY; BEHAVIOR; SENSITIZATION; RESISTANT; STRAIN; WATER;
D O I：
10.1016/j.corsci.2016.01.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：293 / 297
页数：5
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