scholarly journals Frequency effect on high cycle fatigue properties of a carbon steel S45C at intermediate temperatures.

1988 ◽  
Vol 37 (414) ◽  
pp. 261-266
Author(s):  
Kenji KANAZAWA ◽  
Megumi KIMURA ◽  
Morio SATO ◽  
Satoshi NISHIJIMA
Keyword(s):  
Carbon Steel ◽  
High Cycle Fatigue ◽  
Fatigue Properties ◽  
Frequency Effect ◽  
Cycle Fatigue

High-Cycle Fatigue Properties of Carbon Steel and Work-Hardened Oxygen Free Copper in High Pressure Hydrogen

2014 ◽  
Vol 891-892 ◽  
pp. 575-580 ◽  
Author(s):  
Masanobu Kubota ◽  
Kota Kawakami
Keyword(s):  
High Pressure ◽  
Fatigue Strength ◽  
Carbon Steel ◽  
Detrimental Effect ◽  
High Cycle Fatigue ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Slip Bands ◽  
Slip Deformation ◽  
Pressure Hydrogen

The high-cycle fatigue properties of 0.35% carbon steel and work-hardened oxygen-free copper in 10MPa hydrogen were studied. The fatigue limit of the carbon steel in hydrogen was almost the same as that in air. The fatigue strength at 107cycles of the copper was higher in hydrogen than in air. The fatigue life of both materials is longer in hydrogen than in air. The reason was the delays in the crack initiation and the early propagation of the cracks in hydrogen. For both materials, the detrimental effect on the fatigue strength due to the hydrogen environment was small, however, it was determined that hydrogen participates in the slip deformation. The morphology of the slip bands was specific in hydrogen. In the copper, the slip bands, which are non-viable in air, developed in hydrogen.

1213 High-cycle fatigue properties of S35C carbon steel in 10 MPa hydrogen gas

2012 ◽  
Vol 2012.65 (0) ◽  
pp. 435-436
Author(s):  
Takayuki ISHIZAKI ◽  
Takashi SOEJIMA ◽  
Masanobu KUBOTA ◽  
Yoshiyuki KONDO
Keyword(s):  
Carbon Steel ◽  
High Cycle Fatigue ◽  
Hydrogen Gas ◽  
Fatigue Properties ◽  
Cycle Fatigue

Microstructural effects on high-cycle fatigue properties of microalloyed medium carbon steel 38MnVS

2015 ◽  
Vol 640 ◽  
pp. 147-153 ◽  
Author(s):  
Weijun Hui ◽  
Yongjian Zhang ◽  
Chengwei Shao ◽  
Silian Chen ◽  
Xiaoli Zhao ◽  
...  
Keyword(s):  
Carbon Steel ◽  
High Cycle Fatigue ◽  
Medium Carbon Steel ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Medium Carbon ◽  
Microstructural Effects

On the Research and Application of Ultrasonic Fatigue Testing Technology

2015 ◽  
Vol 664 ◽  
pp. 62-67
Author(s):  
Wen Jie Peng ◽  
Yue Wang ◽  
Huan Xue ◽  
Jia He
Keyword(s):  
Size Effect ◽  
Fatigue Test ◽  
High Cycle Fatigue ◽  
Fatigue Testing ◽  
Smelting Process ◽  
Fatigue Properties ◽  
Frequency Effect ◽  
Cycle Fatigue ◽  
Testing Technology ◽  
Ultrasonic Fatigue

In the present paper, the characteristic and the application of ultrasonic fatigue testing technology is illuminated. The main problems i.e. the size effect, the thermal effect and frequency effect due to the high frequency are discussed. The results show that: 1. As there is a size effect, a uniform specimen size should be adopted in the very-high cycle fatigue standard and for special designed specimen the designed size should be noted along with the fatigue test results; 2.the heat generation attributes mainly to the low yield strength and the high applied stress, as a result, ultrasonic fatigue testing technology can be mainly applied to the ultra-high cycle fatigue test of high-strength steel; 3.the frequency effect is related to the crystal structure of metallic materials, however, ultrasonic fatigue testing technology can be applied to conduct the comparison of the fatigue properties of the same steel grade before and after the smelting process.

scholarly journals Usability of Ultrasonic Frequency Testing for Rapid Generation of High and Very High Cycle Fatigue Data

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2245
Author(s):  
Michael Fitzka ◽  
Bernd M. Schönbauer ◽  
Robert K. Rhein ◽  
Niloofar Sanaei ◽  
Shahab Zekriardehani ◽  
...  
Keyword(s):  
Strain Rate ◽  
High Cycle Fatigue ◽  
Fatigue Properties ◽  
Ultrasonic Frequency ◽  
Cycle Fatigue ◽  
Reinforced Polymer ◽  
Very High Cycle Fatigue ◽  
Ultrasonic Fatigue ◽  
Fibre Reinforced Polymer ◽  
Very High

Ultrasonic fatigue testing is an increasingly used method to study the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) properties of materials. Specimens are cycled at an ultrasonic frequency, which leads to a drastic reduction of testing times. This work focused on summarising the current understanding, based on literature data and original work, whether and how fatigue properties measured with ultrasonic and conventional equipment are comparable. Aluminium alloys are not strain-rate sensitive. A weaker influence of air humidity at ultrasonic frequencies may lead to prolonged lifetimes in some alloys, and tests in high humidity or distilled water can better approximate environmental conditions at low frequencies. High-strength steels are insensitive to the cycling frequency. Strain rate sensitivity of ferrite causes prolonged lifetimes in those steels that show crack initiation in the ferritic phase. Austenitic stainless steels are less prone to frequency effects. Fatigue properties of titanium alloys and nickel alloys are insensitive to testing frequency. Limited data for magnesium alloys and graphite suggest no frequency influence. Ultrasonic fatigue tests of a glass fibre-reinforced polymer delivered comparable lifetimes to servo-hydraulic tests, suggesting that high-frequency testing is, in principle, applicable to fibre-reinforced polymer composites. The use of equipment with closed-loop control of vibration amplitude and resonance frequency is strongly advised since this guarantees high accuracy and reproducibility of ultrasonic tests. Pulsed loading and appropriate cooling serve to avoid specimen heating.

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