MULTIAXIAL CREEP OF A NICKEL-BASE SINGLE CRYSTAL SUPERALLOY: ANISOTROPIC EFFECTS AND SIMULATION BY THE CRYSTAL THEORY

1993 ◽  
pp. 583-590
Author(s):  
N. Ohno ◽  
T. Takeuchi ◽  
M. Kobayashi
Keyword(s):  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Multiaxial Creep ◽  
Nickel Base

High Temperature Multiaxial Creep-Fatigue Life Prediction for YH61 Nickel-Base Single Crystal Superalloy

2014 ◽  
Vol 891-892 ◽  
pp. 1027-1032 ◽  
Author(s):  
Wen Zhu Wang ◽  
Masao Sakane ◽  
Takamoto Itoh ◽  
Akira Yoshinari ◽  
Nobuhiro Isobe ◽  
...  
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Evaluation Method ◽  
Biaxial Tension ◽  
Fatigue Tests ◽  
Single Crystal Superalloy ◽  
Compression Tests ◽  
Creep Fatigue ◽  
Multiaxial Creep ◽  
Nickel Base

This paper discusses an evaluation method of creep-fatigue lives of YH61 single crystal superalloy under multiaxial loading at high temperature. Three types of creep-fatigue tests were performed using three types of the single crystalsuperalloy specimens at 1173K. They were push-pull tests using solid bar specimens, tension-torsion tests using hollow cylinder specimens and biaxial tension-compression tests using cruciform specimens. Anisotropic strain and Mises stress in combination with frequency modified fatigue equation were applied for evaluating the creep-fatigue lives in the three types of tests. The former parameter gave a relatively large scatter but the latter parameter a small scatter in the correlation.

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

Tensile behavior of nickel-base single-crystal superalloy DD6

2015 ◽  
Vol 636 ◽  
pp. 608-612 ◽  
Author(s):  
Xinhong Xiong ◽  
Dunmiao Quan ◽  
Pengdan Dai ◽  
Zhiping Wang ◽  
Qiaoxin Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Tensile Behavior ◽  
Single Crystal Superalloy ◽  
Nickel Base

Effect of misorientation on the fatigue life of nickel-base single crystal superalloy DD5 at 980°C

2021 ◽  
pp. 106479
Author(s):  
Piao Li ◽  
Wen Jiang ◽  
Shao-Shi Rui ◽  
Wei-xing Yao ◽  
Hui-ji Shi ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Nickel Base

Creep Behavior of a 4.5% Re Nickel-Base Single Crystal Superalloy at High Temperature

2015 ◽  
Vol 750 ◽  
pp. 139-144 ◽  
Author(s):  
De Long Shu ◽  
Su Gui Tian ◽  
Xin Ding ◽  
Jing Wu ◽  
Qiu Yang Li ◽  
...  
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Single Crystal ◽  
Deformation Mechanism ◽  
Creep Property ◽  
Single Crystal Superalloy ◽  
Micro Cracks ◽  
Initiation And Propagation ◽  
Temperature Ranges ◽  
Nickel Base

By means of heat treatment and creep property measurement, an investigation has made into the creep behaviors of a containing 4.5% Re nickel-base single crystal superalloy at high temperature. Results show that the elements W, Mo and Re are enriched in the dendrite arm regions, the elements Al, Ta, Cr and Co are enriched in the inter-dendrite region, and the segregation extent of the elements may be obviously reduced by means of heat treatment at high temperature. In the temperature ranges of 1070--1100 °C, the 4.5% Re single crystal nickel-based superallloy displays a better creep resistance and longer creep life. The deformation mechanism of the alloy during steady state creep is dislocations slipping in the γ matrix and climbing over the rafted γ′ phase. In the later stage of creep, the deformation mechanism of alloy is dislocations slipping in the γ matrix, and shearing into the rafted γ′ phase, which may promote the initiation and propagation of the micro-cracks at the interfaces of γ/γ′ phases up to the occurrence of creep fracture.

Sign in / Sign up

Export Citation Format

Share Document