We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Self-Heating and Fatigue Assessment of Laser Powder Bed Fusion NiTi Alloy with High Cycle Fatigue Mechanisms Identification
Summary
Researchers applied the self-heating method for the first time to laser powder bed fusion (LPBF) NiTi alloys, testing two loading ratios to rapidly assess fatigue properties. The study identified key high-cycle fatigue mechanisms including intra-grain misorientation, persistent slip band growth, and stress-induced martensite formation.
Rapid methods for assessing the fatigue properties of materials have been developed, among which the self-heating method stands out as particularly promising. This approach analyzes the thermal signal of the specimen when subjected to cyclic loading. In this research, the self-heating method was utilized for the first time with laser powder bed fusion (LPBF) of NiTi alloys, examining two specific loading conditions: loading ratios of 0.1 and 10. A thorough examination of the material self-heating behavior was conducted. For comparative purposes, conventional fatigue tests were also conducted, alongside interrupted fatigue tests designed to highlight the underlying mechanisms involved in high cycle fatigue and potentially self-heating behavior. The investigation revealed several key mechanisms at play, including intra-grain misorientation, the emergence and growth of persistent slip bands, and the formation of stress-induced martensite. These findings not only deepen our understanding of the fatigue behavior of LPBF NiTi alloys but also highlight the self-heating method potential as a tool for studying material fatigue.
Sign in to start a discussion.
More Papers Like This
Fatigue properties of a metastable β-type titanium alloy with reversible phase transformation
Researchers investigated the mechanical and fatigue properties of a nickel-free beta-titanium alloy (Ti-24Nb-4Zr-7.6Sn), finding that stress-induced martensitic transformation suppresses microplastic deformation and improves low-cycle fatigue strength, while cold rolling increases fatigue endurance by roughly 50% — relevant to biomedical implant design.
Fatigue Performance Evaluation of AZ31B Magnesium Alloy Based on Statistical Analysis of Self-Heating
This engineering study tested fatigue behavior in AZ31B magnesium alloy, measuring how the material generates heat under stress in different orientations to predict its fatigue limit. The research has no direct relevance to microplastic or environmental health topics.
Estimating fatigue sensitivity to polycrystalline Ni‐base superalloy microstructures using a computational approach
This computational study examined how microstructural features of a nickel superalloy affect fatigue crack formation and small crack growth, aiming to predict fatigue life variability. This aerospace materials engineering study has no connection to microplastics or environmental health.
A Study of Thermal Stability of Residual Stresses and Fatigue life of Laser Shock Peened Ti-6Al-2Sn-4Zr-2Mo alloy
This aerospace engineering study examined how laser shock peening—a process that introduces compressive stress into metal surfaces—affects the fatigue life and thermal stability of a titanium alloy used in high-temperature aerospace applications. This is a materials engineering study with no relevance to microplastic pollution.
Investigation of Fatigue Damage of Tempered Martensitic Steel during High Cycle Fatigue and Very High Cycle Fatigue Loading Using In Situ Monitoring by Scanning Electron Microscope and High‐Resolution Thermography
This study examined how fatigue damage develops in martensitic steel under high-cycle loading, finding that heat treatment conditions affect the material's failure mechanisms. The research is focused on materials engineering and has limited direct relevance to microplastic pollution.