The formation and evolution of NiAl phase in a fourth generation nickel-based single crystal superalloy

2020 ◽  
Vol 848 ◽  
pp. 156584
Author(s):  
W. Song ◽  
X.G. Wang ◽  
J.G. Li ◽  
J. Meng ◽  
T.F. Duan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Fourth Generation ◽  
Nial Phase ◽  
Formation And Evolution

Oxidation behaviour of NiCoCrAlYHfZr coating on a fourth generation single crystal superalloy

2021 ◽  
pp. 109522
Author(s):  
S.B. Liu ◽  
W. Li ◽  
L.B. Fu ◽  
T.G. Wang ◽  
S.M. Jiang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Oxidation Behaviour ◽  
Single Crystal Superalloy ◽  
Fourth Generation

scholarly journals Effects of Alloying Additions on the Creep Strength of a Fourth Generation Single-Crystal Superalloy

2004 ◽  
Vol 68 (3) ◽  
pp. 206-209 ◽  
Author(s):  
Yutaka Koizumi ◽  
Toshiharu Kobayashi ◽  
Tadaharu Yokokawa ◽  
Makoto Osawa ◽  
Hiroshi Harada ◽  
...  
Keyword(s):  
Single Crystal ◽  
Creep Strength ◽  
Single Crystal Superalloy ◽  
Fourth Generation ◽  
Alloying Additions

scholarly journals Formation and evolution of porosity during high temperature creep of a nickel-based single crystal superalloy

2020 ◽  
Vol 155 ◽  
pp. 01005
Author(s):  
Weiwei Liu ◽  
Yuanyuan Guo ◽  
Mai Zhang ◽  
Jian Zhang
Keyword(s):  
Electron Microscope ◽  
High Temperature ◽  
Single Crystal ◽  
Volume Fraction ◽  
Great Influence ◽  
Single Crystal Superalloy ◽  
Creep Process ◽  
Steady Creep ◽  
Transmission Electron ◽  
Formation And Evolution

A Re-containing single-crystal superalloy was used to research the high temperature low stress creep behavior. Transmission electron microscope, scanning electron microscope and some other research methods are employed. The results and analysis are summarized below: Two mechanisms for the steady creep are found in this experiment. The volume fraction of pores after creep test at 1100°C increased more than 2 times compared with that before test, but the increasing at 1000°C is relatively small, which reveals that temperature has an great influence on the formation of pore during creep; There are two types of pores associated with fracture during the creep process. One is the casting shrinkage located between the interdentritic, which is formed in the solidification of the alloy. Another type of pore is nucleated and growing during the creep deformation.

New configuration of a [001] superdislocation formed during high-temperature creep in the γ′ phase of a single-crystal superalloy TMS-138

2006 ◽  
Vol 21 (3) ◽  
pp. 647-654 ◽  
Author(s):  
J.X. Zhang ◽  
H. Harada ◽  
Y. Koizumi
Keyword(s):  
High Temperature ◽  
Tensile Test ◽  
Single Crystal ◽  
Creep Rupture ◽  
Single Crystal Superalloy ◽  
Fourth Generation ◽  
High Temperature Creep ◽  
Burgers Vector ◽  
Temperature Creep ◽  
Interfacial Dislocations

A new configuration of a superdislocation in the γ′ phase of a fourth-generation single-crystal TMS-138 superalloy was found after creep rupture in a [001] tensile test at 1150 °C and 137 MPa. The segments of the superdislocation lie in four directions, i.e., [110], [110], [100], and [010], strictly on a (001) plane with a Burgers vectorb= [001]. This superdislocation is pure edge in character and does not dissociate into superpartials. Microstructural evidence shows that this kind of superdislocation is formed by combination of two interfacial dislocations with different Burgers vectors, i.e., 1/2[011] + 1/2[011] → [001].

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