Low-Cycle Fatigue Characteristics of Precipitation-Hardened Superalloys at Cryogenic Temperatures

2000 ◽  
Vol 28 (4) ◽  
pp. 257 ◽  
Author(s):  
DR Petersen ◽  
RE Link ◽  
N Suzuki
Keyword(s):  
Low Cycle Fatigue ◽  
Cryogenic Temperatures ◽  
Cycle Fatigue ◽  
Fatigue Characteristics

scholarly journals Impact of Temperature on Low-Cycle Fatigue Characteristics of the HR6W Alloy

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6741
Author(s):  
Grzegorz Junak ◽  
Anżelina Marek ◽  
Michał Paduchowicz
Keyword(s):  
Fatigue Life ◽  
Room Temperature ◽  
Low Cycle Fatigue ◽  
Fatigue Tests ◽  
Total Strain ◽  
Cycle Fatigue ◽  
Fatigue Characteristics

This paper presents the results of tests conducted on the HR6W (23Cr-45Ni-6W-Nb-Ti-B) alloy under low-cycle fatigue at room temperature and at 650 °C. Fatigue tests were carried out at constant values of the total strain ranges. The alloy under low-cycle fatigue showed cyclic strengthening both at room temperature and at 650 °C. The degree of HR6W strengthening described by coefficient n’ was higher at higher temperatures. At the same time, its fatigue life Nf at room temperature was, depending on the range of total strain adopted in the tests, several times higher than observed at 650 °C.

scholarly journals Influence of Hardened Surface on Low Cycle Fatigue Characteristics at Tension-compression and Bending

2015 ◽  
Vol 63 (5) ◽  
pp. 1549-1554
Author(s):  
Artüras Sabaliauskas ◽  
Sergėjus Rimovskis ◽  
Petr Dostál
Keyword(s):  
Plastic Strain ◽  
Low Cycle Fatigue ◽  
White Layer ◽  
Cyclic Stress ◽  
Cycle Fatigue ◽  
Pure Bending ◽  
Cycle Loading ◽  
Fatigue Characteristics ◽  
Tension Strength ◽  
Hardened Surface

This paper analyses electromechanical hardening of the steel parts surface, when in the contact area so called “white layer” is formed. The experiments were performed to show the influence of “white layer” on strength of the steel C45 specimens under low cycle loading. This paper analyses monotonic and low cycle tension compression and pure bending characteristics of specimens with electromechanically hardened surface. The Performed experiments showed that under monotonic tension strength characteristics (σpr, σ02, σu) are increasing and strain characteristics (eu, ψ) are decreasing. During cyclic stress limited tension compression at low loading levels both the width of plastic strain hysteresis loop and accumulated plastic strain are decreasing, therefore the lifetime is increasing. Under pure bending this tendencies persist, but in this case the lifetime at all loading levels is larger than the lifetime at tension compression.

The Issue of Low Cycle Fatigue Scope in the Description of Two-Parameter Fatigue Characteristics

2014 ◽  
Vol 598 ◽  
pp. 225-230
Author(s):  
Grzegorz Szala
Keyword(s):  
High Cycle Fatigue ◽  
Low Cycle Fatigue ◽  
Constructional Steel ◽  
Evaluation Criterion ◽  
Cycle Fatigue ◽  
Fatigue Characteristics ◽  
Two Parameter

This paper discusses the issue connected with determination of the low cycle fatigue scope for the two-parameter fatigue characteristics. Low cycle fatigue (LCF) and high cycle fatigue (HCF) evaluation criterion for constructional steel (C45, S355J0 and 41Cr4) has been discussed.

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