Low-cycle fatigue behavior and life prediction of CP-Ti under non-proportional and multiaxial loading

2021 ◽  
pp. 107930
Author(s):  
Tian-Hao Ma ◽  
Ning Gao ◽  
Le Chang ◽  
Xiao-Hua He ◽  
Chang-Yu Zhou
Keyword(s):  
Life Prediction ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Multiaxial Loading ◽  
Cycle Fatigue ◽  
Cp Ti

LOW CYCLE FATIGUE BEHAVIOR AND LIFE PREDICTION OF A CAST COBALT-BASED SUPERALLOY

2012 ◽  
Vol 06 ◽  
pp. 251-256
Author(s):  
HO-YOUNG YANG ◽  
JAE-HOON KIM ◽  
KEUN-BONG YOO
Keyword(s):  
Fatigue Life ◽  
Strain Energy ◽  
Life Prediction ◽  
Prediction Models ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Total Strain ◽  
Cycle Fatigue ◽  
Total Strain Range ◽  
Different Temperatures

Co -base superalloys have been applied in the stationary components of gas turbine owing to their excellent high temperature properties. Low cycle fatigue data on ECY-768 reported in a companion paper were used to evaluate fatigue life prediction models. In this study, low cycle fatigue tests are performed as the variables of total strain range and temperatures. The relations between plastic and total strain energy densities and number of cycles to failure are examined in order to predict the low cycle fatigue life of Cobalt-based super alloy at different temperatures. The fatigue lives is evaluated using predicted by Coffin-Manson method and strain energy methods is compared with the measured fatigue lives at different temperatures. The microstructure observing was performed for how affect able to low-cycle fatigue life by increasing the temperature.

Multiaxial Low Cycle Fatigue Life Prediction at 300 °C Using Equivalent Strain Appoach

2011 ◽  
Vol 361-363 ◽  
pp. 1669-1672
Author(s):  
Wen Xiao Zhang ◽  
Guo Dong Gao ◽  
Guang Yu Mu
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Strain Range ◽  
Cyclic Fatigue ◽  
Equivalent Strain ◽  
Multiaxial Fatigue ◽  
Fatigue Life Prediction ◽  
Cycle Fatigue

The low cycle fatigue behavior was experimentally studied with the 3-dimension notched LD8 aluminum alloy specimens at 300°C. The 3- dimension stress-strain responses of specimens were calculated by means of the program ADINA. The multiaxial fatigue life prediction was carried out according to von Mises’s equivalent theory. The results from the prediction showed that the equivalent strain range can be served as the valid mechanics for predicting multiaxial high temperature and low cyclic fatigue life.

Comparisons of low cycle fatigue behavior of CP-Ti under stress and strain-controlled modes in transverse direction

2019 ◽  
Vol 746 ◽  
pp. 27-40 ◽  
Author(s):  
Le Chang ◽  
Bin-Bin Zhou ◽  
Tian-Hao Ma ◽  
Jian Li ◽  
Xiao-Hua He ◽  
...  
Keyword(s):  
Transverse Direction ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Stress And Strain ◽  
Cycle Fatigue ◽  
Cp Ti

Low-cycle fatigue behavior and life prediction of fine-grained 316LN austenitic stainless steel

2020 ◽  
Vol 35 (23-24) ◽  
pp. 3180-3191
Author(s):  
Zhe Zhang ◽  
An Li ◽  
Yanping Wang ◽  
Qiang Lin ◽  
Xu Chen
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Life Prediction ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Fine Grained

Abstract

Low Cycle Fatigue Behavior of CP-Ti at Different Temperatures

2019 ◽  
Vol 795 ◽  
pp. 29-34
Author(s):  
Tian Hao Ma ◽  
Le Chang ◽  
Chang Yu Zhou
Keyword(s):  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Fatigue Cracks ◽  
Cyclic Softening ◽  
Cycle Fatigue ◽  
Different Temperatures ◽  
Cp Ti ◽  
The Relationship ◽  
Life Prediction Model

Low cycle fatigue (LCF) tests are performed on CP-Tiat different temperatures (293K,423K and 523K). It is found that the fatigue life of CP-Tidecreases with temperature. A short cycle hardening phenomenon occurs at the beginning of cyclic deformationat 293K and 423K, followed by cyclic softening untilfailure. At 523K, cycle hardening isexhibited throughout the entire cycle until thefracture. The fatigue-life curves obtained from the tests are constructed using Coffin-Manson-Basquin model. According to the relationship between the four parameters of Coffin-Manson-Basquin model and temperature, the temperature-based life prediction model is further proposed. Scanning electron microscopy observation of fatigue fractures showsthat the fatigue cracks of CP-Tiat 423K and 523K under different strain amplitudes initiate on the surface of fatigue specimens and extend to the fracture zone by the transgranular mode.

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