We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Estimating fatigue sensitivity to polycrystalline Ni‐base superalloy microstructures using a computational approach
Summary
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.
ABSTRACT A computational study is conducted to determine the influence of microstructure attributes and properties on driving forces for fatigue crack formation and microstructurally small crack growth in a polycrystalline Ni‐base superalloy, IN100, a turbine disk alloy. A principal objective is to obtain quantitative estimates of the effect of variability of microstructure features on scatter in fatigue life or fatigue strength for a given life. Understanding is sought regarding sensitivity of driving forces to various microstructure attributes that may guide selection of the process route to tailor microstructure to achieve fatigue resistance. A microstructure‐sensitive crystal plasticity model is used to explicitly model individual grains and polycrystals, which is then used to explore effects of: (a) grain size distribution and (b) secondary and tertiary coherent γ′ precipitate size distributions and volume fractions on the cyclic inelastic strain distribution. Multiple statistical volume elements (SVEs) are subjected to random periodic boundary conditions to build up statistically significant measures of distributions of cyclic microplasticity. Multiaxial fatigue criteria with critical plane approaches are used to estimate the crack initiation life. Methods are developed for assessing crack formation and microstructurally small crack growth as a function of microstructure attributes.
Sign in to start a discussion.
More Papers Like This
Dislocation Arrangements and Cyclic Microplasticity Surrounding Stress Concentration in a Ni‐Based Single‐Crystal Superalloy
Not relevant to microplastics — this materials science study examines dislocation behavior and fatigue crack initiation in nickel-based single-crystal superalloys; 'microplasticity' here refers to microscale metal deformation, not plastic particles.
Crack nucleation using combined crystal plasticity modelling, high-resolution digital image correlation and high-resolution electron backscatter diffraction in a superalloy containing non-metallic inclusions under fatigue
This materials engineering study combined crystal plasticity modeling with high-resolution microscopy to understand how fatigue cracks form near non-metallic inclusions in nickel superalloys. The research addresses durability of industrial alloy components and is not related to microplastics research.
Microstructure sensitive simulation framework for additively manufactured Hastelloy-X
This study modeled the microstructure of a nickel-based superalloy produced by additive manufacturing to predict its mechanical behavior. The research is focused on aerospace materials engineering and has no direct connection to microplastics or environmental health.
The influence of microstructure on the fatigue crack growth rate in marine steels in the Paris Region
This study examined how internal microstructure affects fatigue crack growth in marine-grade steel under seawater and air conditions, identifying three crack-influencing phenomena. The research pertains to offshore structural integrity and is not directly related to microplastics or human health.
Exploring the effect of complex hierarchic microstructure of quenched and partitioned martensitic stainless steels on their high cycle fatigue behaviour
This study examined the fatigue behavior of quenched and partitioned martensitic stainless steels, finding that their complex microstructure affects how they fail under cyclic loading. This is a materials science paper with no direct relevance to microplastics or environmental health.