... This study presents an integrated mathematical model to predict the fatigue life of a bearing rolling element under the influence of both the microinclusion effect and the precessional slip. The relationship between microinclusion effect and precessional slip was modeled and validated...

... properties of fuel rod dummy claddings, (ii) the resistance of claddings to low-cycle fatigue, (iii) the creep resistance of claddings under pressure and by the stress-relaxation method of deformed samples in the longitudinal direction, and (iv) the morphology of hydrides by metallography. All tests were...

... In the bicycle and e-bike industry, lightweight designs often incorporate aluminum tube constructions that are joined through inert gas welding. These constructions are susceptible to fatigue damage. A standardized test specimen (two tubes joined to a T shape) was designed to determine how...

... designed to investigate the influence of the process conditions on the hybrid specimens. In the very high cycle fatigue (VHCF) range, testing was conducted at a frequency of 20 kHz using intermittent vibrations. The system was designed to undergo 200 ms of resonance before halting for the next 200 ms...

... anneal martensite bainite secondary hardening cleanliness fatigue composition 21 Chapter 2 | Basic Bearing Steel Metallurgy and Relationship of Steel Composition, Metallurgical Cleanliness, and Heat Treatment Specifications and Standard Methods Introduction The functional properties of bearing...

... in oxygen applications. A comprehensive understanding of factors that cause leaks and ignition in hoses used in oxygen service is important to prevent future fires. corrugated metal hose failure analysis fatigue fire fire investigation oxygen oxygen fire incident FLAMMABILITY AND SENSITIVITY...

... and elevated hydrogen content enhances the susceptibility to hydride related failures such as delayed hydride cracking. The motivation behind this work was to investigate whether the fatigue crack initiation behavior may also be affected by the presence of aligned notch-root hydrides in irradiated material...

... Fatigue cracks grow from pores at the surface of components that were produced by laser powder bed fusion (LPBF). In AlSi10Mg components produced by LPBF, large oxides apparently interfere with consolidation of powder into the melt pool, contributing to part porosity; the oxides may also...

..., where predicted and measured distortions were found to be in good agreement. The predicted residual stresses after each process of the chain were used to develop theoretical fatigue S-N curves using the endurance limit approach. This approach requires knowledge for the surface roughness, as well...

... Effects of as-built surface roughness and porosity on fatigue performance were investigated for AlSi10Mg produced by the laser powder bed fusion (L-PBF) process. As-built (with original surface roughness) and polished (surface roughness removed) samples were used to study the effect of surface...

... polishing times are considered. Furthermore, the surface finishing of AM parts can lead to the opening of subsurface pores, which are associated with the AM process and are among the main causes of fatigue failure in AM parts. Cracks initiate from the micronotches related to the rough surface. However...

... particle inspection (MPI) at high current flow. This paper presents the use of Mode I fatigue testing to test such indications and compare the results with identical indication free samples. Mode I was chosen as it had the advantage of maintaining the MPI indications in their original condition...

... on relevant end-use properties is addressed whenever possible. For example, the effect of lack-of-fusion flaws on ultimate tensile properties and high cycle fatigue life is discussed, thus demonstrating the need to be able to detect such flaws. Thus, although the causes of the defects occurring in PBF and DED...

... equipment is being improved through this manufacturing technique. Process-inherent defects are still encountered and may lead to significant safety factors, particularly for highly loaded, mission-critical applications. An analysis of the fatigue properties of AlSi10Mg produced by selective laser melting...

.... Specifically, this work documents predictive mechanics models that characterize the effects of pores on fatigue crack formation. These results provide insight into the effects of pore size and shape on fatigue lives under uniaxial tension. additive manufacturing defects fatigue uniaxial tension...

... To guarantee the quality of additively manufactured parts, the processing-structure-property-performance (PSPP) relationship must be understood. Despite the current applications of additive manufacturing (AM) in various industries, a suitable understanding of material performance under fatigue...

... the statistical behavior of fatigue and fracture of AM materials by addressing the critical variations of novel microstructure, defects, surface roughness, and residual stress. The software accepts data from multiple sources, including data from the open literature and prior material certification programs. Thus...

... This article reviews the use of nitinol endovascular devices and the effects of biomechanics, design, and nitinol processing and microstructural purity on fatigue and fracture. Nitinol self-expanding stents have shown an improvement in the effectiveness of treatment of femoral arterial disease...

... Fatigue life analysis of superelastic nitinol in medical device applications is challenging due to a number of confounding factors. Chief among them is the lack of a clear definition of a nitinol fatigue constant life diagram. It is equally difficult to convert the complex loading and anatomic...

... In this investigation, diamond-shaped samples laser-cut from nitinol tubing were used to investigate the effect of variable amplitude fatigue loading. Alternating strain amplitudes of 0.30 %, 0.35 %, and 0.40 % were applied with periodic high strain amplitude of 0.70 %. The high strain...