Large stress concentrations around micropore near a crack-tip induced deformation twinning in Ni-based single crystal superalloy

2014 ◽  
Vol 586 ◽  
pp. 479-484 ◽  
Author(s):  
Fei Sun ◽  
Shu Zhang ◽  
Sugui Tian ◽  
Jianxin Zhang ◽  
Hiroshi Harada
Keyword(s):  
Single Crystal ◽  
Crack Tip ◽  
Deformation Twinning ◽  
Single Crystal Superalloy ◽  
Stress Concentrations

Finite Element Analysis on Crack Tip Deformation Behavior under Mode-II Loading in Single Crystal Superalloy

2015 ◽  
Vol 665 ◽  
pp. 281-284
Author(s):  
Yasuhiro Mukai ◽  
Hiroyuki Kagawa ◽  
Masakazu Okazaki
Keyword(s):  
Finite Element ◽  
Single Crystal ◽  
Deformation Behavior ◽  
Stress Condition ◽  
Crack Tip ◽  
Single Crystal Superalloy ◽  
Mode Ii ◽  
Element Analysis ◽  
Inclusion Theory ◽  
Mode Ii Loading

Crack tip deformation behavior of single crystal superalloy under mode-II shear stress condition was evaluated by crystal plasticity finite element method by applying Eshelby’s inclusion theory to express the relation between microscopic and macroscopic stress/strain character, and the influence of γ/γ’ microstructure and anomalous temperature dependence of yield strength in γ’ phase on crack tip deformation behavior was studied

A new type of cracks adding to Griffith–Irwin cracks

2019 ◽  
Vol 485 (2) ◽  
pp. 162-165
Author(s):  
V. A. Babeshko ◽  
O. M. Babeshko ◽  
O. V. Evdokimova
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Crack Tip ◽  
Stress Concentrations ◽  
New Type

The distinctions in the description of the conditions of cracking of materials are revealed. For Griffith–Irwin cracks, fracture is determined by the magnitude of the stress-intensity factor at the crack tip; in the case of the new type of cracks, fracture occurs due to an increase in the stress concentrations up to singular concentrations.

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.

The Effect of Tensile Stress on Oxidation Behavior of Nickel-Base Single Crystal Superalloy

2021 ◽  
pp. 109737
Author(s):  
Hai-Qing Pei ◽  
Meng Li ◽  
Ping Wang ◽  
Xiao-Hu Yao ◽  
Zhi-Xun Wen ◽  
...  
Keyword(s):  
Tensile Stress ◽  
Single Crystal ◽  
Oxidation Behavior ◽  
Single Crystal Superalloy ◽  
Nickel Base
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