Results 31 to 40 of about 328 (171)

Effect of Artificial Defects on the Very High Cycle Fatigue Behavior of 316L Stainless Steel

open access: yesMetals, 2019
Widely used for structural materials in nuclear engineering, 316L austenitic stainless steel undergoes very high cycle fatigue (VHCF) throughout its service life.
Zhihong Xiong   +2 more
doaj   +1 more source

Automation in Strain and Temperature Control on VHCF with an Ultrasonic Testing Facility [PDF]

open access: yes, 2014
Increased safety and reliability in mechanical components has become a subject of prime importance in recent years. Therefore, a proper understanding of damage and fracture mechanics in materials and components designed to withstand very high cycle fatigue (VHCF) loadings is extremely important nowadays.
Lage, Y.   +4 more
openaire   +1 more source

Ultrasonic Fatigue Device and Behavior of High-Temperature Superalloy Inconel 718 with Self-Heating Phenomenon

open access: yesApplied Sciences, 2020
Ultrasonic resonance fatigue test method at 20 kHz related to the very high cycle fatigue (VHCF) aims to accelerate a time-consuming experiment. In this paper, an ultrasonic fatigue device with a data acquisition system was improved for monitoring and ...
Mengxiong Zhao   +5 more
doaj   +1 more source

Influence of a Thermo-Mechanical Treatment on the Fatigue Lifetime and Crack Initiation Behavior of a Quenched and Tempered Steel

open access: yesMetals, 2022
A thermo-mechanical treatment (TMT) at the temperature of maximum dynamic strain aging has been optimized and performed on quenched and tempered steel SAE4140H (German designation: 42CrMo4) in order to improve the fatigue limit in the high cycle fatigue (
Amin Khayatzadeh   +4 more
doaj   +1 more source

Effect of Turning on the Surface Integrity and Fatigue Life of a TC11 Alloy in Very High Cycle Fatigue Regime

open access: yesMetals, 2020
In this work, the effect of a turning process on fatigue performance of a Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (TC11) titanium alloy is studied in the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regimes.
Tao Gao   +6 more
doaj   +1 more source

Characteristics and micromechanisms of fish-eye crack initiation of a Ti-6Al-4V alloy in very high cycle fatigue regime

open access: yesJournal of Materials Research and Technology, 2022
The fracture surface characteristics and the associated micromechanisms governing the fish-eye crack initiation of a Ti-6Al-4V alloy under very high cycle fatigue (VHCF) loading are investigated. Microscopic observation revealed that the crack initiation
Tao Gao   +3 more
doaj   +1 more source

Experimental Investigation of VHCF of Polymer Composites: Two Alternative Approaches* [PDF]

open access: yesMaterials Testing, 2012
Abstract The need for reliable fatigue predictions arises with an increasing application of fibre-reinforced composites in primary light-weight structures with intended service times of up to 30 years. Only few data about very high cycle fatigue (VHCF) of polymer composites are available, because VHCF testing is rather challenging due to
Adam, Till Julian   +3 more
openaire   +2 more sources

Self-similarity of damage-failure transition and the power laws of fatigue crack advance

open access: yesFracture and Structural Integrity
We propose the interpretation of the Finite Fracture Mechanics based on the criticality of damage-failure transition due to specific metastability of free energy release.
Oleg Naimark   +2 more
doaj   +1 more source

Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes

open access: yesMaterials Research Express, 2021
Based on the self-built three point bending ultrasonic fatigue test system, fatigue behavior of TC4 titanium alloy after different forging processes in high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regimes was discussed in this paper.
Wenbin Cui   +5 more
doaj   +1 more source

VHCF, Tribology Characteristics and UNSM Effects of Bainite and Martensite Spring Steels

open access: yesMetals, 2022
It has been reported that the duplex bainite microstructure obtained by austempering (AT) shows higher strength, ductility and impact toughness than quench and tempered (QT) martensite structure in SAE9254 spring steel.
Min Soo Suh   +3 more
doaj   +1 more source

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