Effect of Rhenium Addition on Hot Corrosion Resistance of Ni-Based Single Crystal Superalloys

2018 ◽  
Vol 49 (9) ◽  
pp. 4343-4352 ◽  
Author(s):  
J. X. Chang ◽  
D. Wang ◽  
X. G. Liu ◽  
L. H. Lou ◽  
J. Zhang
Keyword(s):  
Corrosion Resistance ◽  
Single Crystal ◽  
Hot Corrosion ◽  
Rhenium Addition

Effect of Re and Ta on Hot Corrosion Resistance of Nickel-base Single Crystal Superalloys

2016 ◽  
pp. 177-185 ◽  
Author(s):  
J.X. Chang ◽  
D. Wang ◽  
G. Zhang ◽  
L.H. Lou ◽  
J. Zhang
Keyword(s):  
Corrosion Resistance ◽  
Single Crystal ◽  
Hot Corrosion ◽  
Nickel Base

scholarly journals Effects of Different Surface Native Pre-Oxides on the Hot Corrosion Properties of Nickel-Based Single Crystal Superalloys

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5774
Author(s):  
Zehao Chen ◽  
Shusuo Li ◽  
Mengmeng Wu ◽  
Yanling Pei ◽  
Shengkai Gong ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Single Crystal ◽  
Hot Corrosion ◽  
Corrosion Properties ◽  
Al2o3 Layer ◽  
Nickel Based Superalloy ◽  
Surface Oxides ◽  
The Relationship ◽  
Positive Effect

A study is carried out on the effect of different surface native pre-oxides on hot corrosion of single crystal nickel-based superalloy at 900 °C. The effect of different oxides formed by different superalloys through pre-oxidation on hot corrosion is verified by normal hot corrosion and tube sealing experiments. The relationship between different surface oxides and the effect of different surface oxides layer on the hot corrosion properties of alloys are studied. In summary, the stable and dense surface pre-Al2O3 layer which can be obtained by pre-oxidation has an obvious positive effect on the improvement of superalloy hot corrosion resistance in reaction. In addition, the internal sulfides are analyzed in depth, and the relationship between Cr, Mo, O and S is discussed in detail.

Interaction of Ta and Cr on Type-I hot corrosion resistance of single crystal Ni-base superalloys

2017 ◽  
Vol 117 ◽  
pp. 35-42 ◽  
Author(s):  
J.X. Chang ◽  
D. Wang ◽  
G. Zhang ◽  
L.H. Lou ◽  
J. Zhang
Keyword(s):  
Corrosion Resistance ◽  
Single Crystal ◽  
Hot Corrosion ◽  
Type I

scholarly journals Influence of alloying elements on hot corrosion resistance of nickel-based single crystal superalloys coated with Na2SO4 salt at 900 °C

2021 ◽  
Vol 197 ◽  
pp. 109197
Author(s):  
Peng Song ◽  
Mingfeng Liu ◽  
Xiangwei Jiang ◽  
Yuchao Feng ◽  
Junjie Wu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Single Crystal ◽  
Hot Corrosion ◽  
Alloying Elements

scholarly journals Burner Rig Hot Corrosion of a Single Crystal Ni-48Al-Ti-Hf-Ga Alloy

1998 ◽  
Vol 552 ◽  
Author(s):  
J. A. Nesbitt ◽  
R. Darolia ◽  
M. D. Cuy
Keyword(s):  
Corrosion Resistance ◽  
Single Crystal ◽  
Combustion Chamber ◽  
Corrosion Product ◽  
Hot Corrosion ◽  
Intermediate Stage ◽  
Sea Salt ◽  
Corrosion Attack ◽  
Mound Morphology ◽  
Aluminum Consumption

ABSTRACTThe hot corrosion resistance of a single crystal Ni-48Al-1Ti-0.5Hf-0.2Ga‡ alloy was examined in a Mach 0.3 burner rig at 900C for 300 hours. The combustion chamber was doped with 2 ppmw synthetic sea salt. The hot corrosion attack produced a random mound morphology on the surface. Microstructurally, the hot corrosion attack appeared to initiate with oxide-filled pits which were often broad and shallow. At an intermediate stage, the pits increased in size to incorporate unoxidized Ni islands in the corrosion product. The rampant attack stage, which was observed only at sharp sample corners, was characterized by rapid inward growth of alumina in finger-like protrusions incorporating significant amounts of Al-depleted Ni islands. Aluminum consumption in the oxide fingers resulted in the growth of a γ' layer ahead of the advancing oxide fingers.

CMSX-11B

Alloy Digest ◽  
1998 ◽  
Vol 47 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Single Crystal ◽  
Oxidation Resistance ◽  
Creep Strength ◽  
Hot Corrosion ◽  
First Generation ◽  
Heat Treating ◽  
Corrosion And Oxidation ◽  
Better Than

Abstract CMSX-11B is a non-rhenium containing single-crystal (SX) superalloy defined primarily for industrial turbine applications. The material develops a unique and extremely good blend of hot corrosion and oxidation resistance. It exhibits extremely good castability, employs relatively simple solution heat treatments, and provides creep strength that is as good or better than other first generation SX materials such as CMSX-2 (Alloy Digest Ni-417, November 1992), CMSX-3 (Alloy Digest Ni-420, January 1993), CMSX-4 (Alloy Digest Ni-447, March 1994), CMSX-6 (Alloy Digest Ni-418, December 1992), PWA 1480, and Rene N4. This datasheet provides information on composition and physical properties as well as creep. It also includes information on corrosion resistance as well as casting and heat treating. Filing Code: Ni-537. Producer or source: Cannon-Muskegon Corporation.

scholarly journals The Effect of Microstructural Differences on NA2SO4-Induced Corrosion of Superalloy CMSX-4 at High Temperatures

1997 ◽  
Author(s):  
Ming Li ◽  
Vimal H. Desai ◽  
N. Sastry Cheruvu
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Single Crystal ◽  
Hot Corrosion ◽  
Eutectic Structure ◽  
Short Exposure ◽  
Short Exposure Time ◽  
Heat Treated ◽  
Large Casting ◽  
Dendritic Arm Spacing

Single crystal (SC) nickel based superalloys have been used in aero engine applications for a long time. The SC casting techniques are not yet widely used in the land based engine components because of their much larger size which makes casting and the subsequent heat treatment more difficult. In large casting, microporosity and elemental segregation are more severe. The γ/γ′ eutectic structure and dendritic arm spacing are also larger due to large casting size. All these defects will affect the heat treatment process and the subsequent service properties, including the resistance to oxidation and hot corrosion. In this work, as-cast and heat treated CMSX-4 specimens from small and large blades were used to study the effects of cast defects and heat treatment on Na2SO4 -induced hot corrosion resistance of the single crystal superalloy. The tests were carried out between 900 to 1000°C, for times ranging than 10 to 600 hours in the presence of a Na2SO4 deposit. The specimens from as-cast large blade underwent catastrophic attack after a short exposure time. But the initiation time for catastrophic attack approximately doubled in the case of wholly solution heat treated specimens. It is thus likely that although the hot corrosion resistance of this single crystal material is not as good as that of IN738, proper heat treatment can improve its hot corrosion resistance.

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