A5008278986- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- High Entropy Alloys Studies
- Welding Techniques and Residual Stresses
- Titanium Alloys Microstructure and Properties
- Advanced Materials Characterization Techniques
- Manufacturing Process and Optimization
- High-Temperature Coating Behaviors
- Advanced materials and composites
- Microstructure and Mechanical Properties of Steels
- High Temperature Alloys and Creep
- Fatigue and fracture mechanics
- Metal and Thin Film Mechanics
- Intermetallics and Advanced Alloy Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Metal Alloys Wear and Properties
- Laser Material Processing Techniques
- Material Properties and Applications
- Engineering Technology and Methodologies
- Surface Treatment and Residual Stress
- Laser-induced spectroscopy and plasma
- Aluminum Alloy Microstructure Properties
- Injection Molding Process and Properties
- Laser and Thermal Forming Techniques
- Bone Tissue Engineering Materials
Sandia National Laboratories
2020-2024
Sandia National Laboratories California
2020-2024
Auburn University
2017-2021
Mississippi State University
2015
Abstract Although additive manufacturing (AM) has gained significant attention due to the advantages it offers and is currently a focus of much research, design critical load carrying components utilizing such processes still at its infancy. This fact that most made by AM are subjected cyclic loads, fatigue behaviour metals far less understood as compared with those conventional methods, wrought cast metals. To better understand metals, wide range issues affect in synergistic manner must be...
In this study, a simple approach for estimating the effect of surface roughness on fatigue strength additive manufactured Ti-6Al-4V is investigated. Surface parameters are used to estimate elastic stress concentration factor and resulting factor. The estimated strengths then compared with experimentally obtained specimen batches varying conditions. Results show that comparable experimental strengths, predicted stress-life curves fit data reasonably well.
The limited understanding of additive manufacturing process-structure–property inter-relationships raises some concerns regarding the structural reliability, which limits adoption this emerging technology. In study, laser beam-powder bed fusion is leveraged to fabricate an austenitic stainless steel with a microstructure containing minimal known crack initiation features. Ex-situ microstructural observations features and mechanisms are carried out for interrupted fatigue tests via electron...
Abstract In this study, the effect of strain rate on cyclic behaviour 304L stainless steel is investigated to unveil complex interrelationship between martensitic phase transformation, secondary hardening, deformation and fatigue alloy. A series uniaxial controlled tests with varying rates were conducted at zero non‐zero mean conditions. Secondary hardening was found be closely related volume fraction strain‐induced martensite which affected by adiabatic heating due increasing rates. Tests...
Ti–5V–5Mo–5Al–3Cr (Ti-5553) is a near-beta titanium alloy commonly used in aerospace applications. It currently being explored for additive manufacturing (AM), but the fatigue behavior of this AM needs to be well-understood adoption. This paper explores tensile and high-cycle laser powder bed (LPBF) manufactured Ti-5553 that has been post-print heat treated with beta anneal age (BAA), focus on microstructural evolution effects surface roughness print defects. Fatigue lives as-LPBF BAA...
Refractory complex concentrated alloys are an emerging class of materials that attracts attention due to their stability and performance at high temperatures. In this study, we investigate the variations in mechanical thermal properties across a broad compositional space for refractory MoNbTaTi quaternary using high-throughput ab-initio calculations experimental characterization. For all surveyed, note good agreement between our modeling predictions experimentally measured values. We reveal...
Materials are needed that can tolerate increasingly harsh environments, especially ones retain high strength at extreme temperatures. Higher melting temperature alloys, like those consisting primarily of refractory elements, greatly increase the efficiency turbomachinery used in grid electricity production worldwide. Existing including Ni- and Co-based superalloys, components turbine blades, bearings, seals, remain a performance limiting factor due to their propensity, despite extensive...