Mechanisms for tertiary creep of single crystal superalloy

2008 ◽  
Vol 12 (4) ◽  
pp. 275-289 ◽  
Author(s):  
Alexander Staroselsky ◽  
Brice Cassenti
Keyword(s):  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Tertiary Creep

Microstructural Evolution of the [001] Oriented Single Crystal Superalloy DD6 Creep at 760°C and 785 MPa

2012 ◽  
Vol 535-537 ◽  
pp. 888-893
Author(s):  
Jian Yu ◽  
Jia Rong Li ◽  
Zhen Xue Shi ◽  
Jin Qian Zhao ◽  
Shi Zhong Liu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Incubation Period ◽  
Microstructural Evolution ◽  
Stacking Faults ◽  
Primary Creep ◽  
Single Crystal Superalloy ◽  
Tertiary Creep ◽  
The Matrix ◽  
Oriented Single Crystal

The creep and microstructures of DD6 single crystal superalloy with [001] orientation at 760°C and 785MPa were investigated. The results show that large a/2 dislocations are spread and concentrated in matrix channels during incubation period, and few of stacking faults are observed at later stage of incubation period. The stage of primary creep is characterized by the stacking faults shearing γ' phases, and the density of a/2 dislocations in the matrix continues to increase. The density of the stacking faults increases during the stages of secondary and tertiary creep.

Tertiary creep behaviour of a new single crystal superalloy at 900°c

2000 ◽  
Vol 43 (7) ◽  
pp. 637-644 ◽  
Author(s):  
M Maldini ◽  
H Harada ◽  
Y Koizumi ◽  
T Kobayashi ◽  
V Lupinc
Keyword(s):  
Single Crystal ◽  
Creep Behaviour ◽  
Single Crystal Superalloy ◽  
Tertiary Creep

Crystal Plasticity Assessment to Crystallographic Stage I Cracking in a Ni-Based Single Crystal Superalloy

2018 ◽  
Author(s):  
Motoki Sakaguchi ◽  
Ryota Komamura ◽  
Mana Higaki ◽  
Xiaosheng Chen ◽  
Hirotsugu Inoue
Keyword(s):  
Single Crystal ◽  
Crystal Plasticity ◽  
Stage I ◽  
Single Crystal Superalloy

New Phases in a Multicomponent High Ruthenium Single Crystal Superalloy

2005 ◽  
Vol 475-479 ◽  
pp. 655-660 ◽  
Author(s):  
Q. Feng ◽  
L.J. Rowland ◽  
T.M. Pollock
Keyword(s):  
Single Crystal ◽  
Dendritic Structure ◽  
Thermal Exposure ◽  
Single Crystal Superalloy ◽  
Heusler Phase ◽  
Topologically Close Packed ◽  
Tcp Phases ◽  
Δ Phase

Three unusual Ru-rich phases have been identified in a multicomponent Ni-base single crystal superalloy, including a L21 Ru2AlTa Heusler phase, a B2 RuAl phase and a hcp Re(Ru)-rich δ phase. These phases have their own preferential precipitation location within the dendritic structure. No conventional topologically-close-packed (TCP) phases have been observed with thermal exposure at 950oC for 1500 hours.

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