Jeremy E. Schaffer
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View article: Study on effect of residual stresses and strains in sequential passes in microwire drawing
Study on effect of residual stresses and strains in sequential passes in microwire drawing Open
Digital twins (DT) have been widely applied to model complex manufacturing processes and products for various purposes such as implementing controls, monitoring operations, and identifying bottlenecks of manufacturing processes. This paper…
View article: Evaluation of FeMnN alloy bioresorbable flow diverters in the rabbit elastase induced aneurysm model
Evaluation of FeMnN alloy bioresorbable flow diverters in the rabbit elastase induced aneurysm model Open
Introduction Flow diverters are specialized stents used to treat intracranial aneurysms. Bioresorbable flow diverters (BRFDs) have been proposed as the next-generation of flow diverter technology. BRFDs aim to occlude and heal the aneurysm…
View article: Evaluation of FeMnN alloy bioresorbable flow diverting stents in the rabbit abdominal aorta
Evaluation of FeMnN alloy bioresorbable flow diverting stents in the rabbit abdominal aorta Open
View article: The Role of Hyperlipidemia on Magnesium Biocorrosion in vitro and in vivo
The Role of Hyperlipidemia on Magnesium Biocorrosion in vitro and in vivo Open
View article: Correction to: Effect of Cu Alloying and Heat Treatment Parameters on NiTi Alloy Phase Stability and Constitutive Behavior
Correction to: Effect of Cu Alloying and Heat Treatment Parameters on NiTi Alloy Phase Stability and Constitutive Behavior Open
View article: Effect of Cu Alloying and Heat Treatment Parameters on NiTi Alloy Phase Stability and Constitutive Behavior
Effect of Cu Alloying and Heat Treatment Parameters on NiTi Alloy Phase Stability and Constitutive Behavior Open
NiTiCu alloys with Cu-content up to 20 at.% were successfully made into fine wire with cold-drawn area reduction of 70%. These materials were heat treated and tested at different conditions to study phase transformation and constitutive be…
View article: Semi-quantitative elemental imaging of corrosion products from bioabsorbable Mg vascular implants in vivo
Semi-quantitative elemental imaging of corrosion products from bioabsorbable Mg vascular implants in vivo Open
While metal materials historically have served as permanent implants and were designed to avoid degradation, next generation bioabsorbable metals for medical devices such as vascular stents are under development, which would elute metal io…
View article: Radiopaque FeMnN-Mo composite drawn filled tubing wires for braided absorbable neurovascular devices
Radiopaque FeMnN-Mo composite drawn filled tubing wires for braided absorbable neurovascular devices Open
View article: Evaluation of FeMnN Alloy Bioresorbable Flow Diverting Stents in the Rabbit Abdominal Aorta
Evaluation of FeMnN Alloy Bioresorbable Flow Diverting Stents in the Rabbit Abdominal Aorta Open
View article: Radiopaque FeNnN-Mo Composite Drawn Filled Tubing Wires for Braided Absorbable Neurovascular Devices
Radiopaque FeNnN-Mo Composite Drawn Filled Tubing Wires for Braided Absorbable Neurovascular Devices Open
View article: Intraluminal Flow Diverter Design Primer for Neurointerventionalists
Intraluminal Flow Diverter Design Primer for Neurointerventionalists Open
The clinical use of flow diverters for the treatment of intracranial aneurysms has rapidly grown. Consequently, the market and technology for these devices has also grown. Clinical performance characteristics of the flow diverter are well-…
View article: Modulating the Pseudoelastic Response of Nitinol Using Ion Implantation
Modulating the Pseudoelastic Response of Nitinol Using Ion Implantation Open
This work explores whether ion beam modification can be used to modulate the austenite to martensite phase transformation in Nickel-Titanium (NiTi), thereby achieving novel or localized transformation properties in near-surface regions. We…
View article: Taming the Pseudoelastic Response of Nitinol Using Ion Implantation
Taming the Pseudoelastic Response of Nitinol Using Ion Implantation Open
View article: Benchtop proof of concept and comparison of iron- and magnesium-based bioresorbable flow diverters
Benchtop proof of concept and comparison of iron- and magnesium-based bioresorbable flow diverters Open
OBJECTIVE Bioresorbable flow diverters (BRFDs) could significantly improve the performance of next-generation flow diverter technology. In the current work, magnesium and iron alloy BRFDs were prototyped and compared in terms of porosity/p…
View article: Fatigue, Fracture, and Crack Arrest from Bending Induced Pre-strain in Superelastic Nitinol
Fatigue, Fracture, and Crack Arrest from Bending Induced Pre-strain in Superelastic Nitinol Open
The present study evaluates the fatigue and fracture performance of electropolished Nitinol wire apex specimens subjected to a range of initial bending crimp/pre-strains to determine how the fatigue behavior may be modified by compressive …
View article: Modulating the Pseudoelastic Response of NiTi Using Ion Implantation
Modulating the Pseudoelastic Response of NiTi Using Ion Implantation Open
Ni-ion irradiated NiTi is nearly 50% harder, retains 85% recoverable deformation, and has reduced hysteresis. This work explores the feasibility of using ion beam modification to modulate the austenite to martensite phase transformation in…
View article: Modulating the Pseudoelastic Response of NiTi Using Ion Implantation
Modulating the Pseudoelastic Response of NiTi Using Ion Implantation Open
Ni-ion irradiated NiTi is nearly 50% harder, retains 85% recoverable deformation, and has reduced hysteresis. This work explores the feasibility of using ion beam modification to modulate the austenite to martensite phase transformation in…
View article: Taming the Pseudoelastic Response of Nitinol Using Ion Implantation
Taming the Pseudoelastic Response of Nitinol Using Ion Implantation Open
View article: Pseudoelastic Response of Ion-Implanted Nickel-Titanium Shape Memory Alloy: Combining Experimentation and Forward Modeling.
Pseudoelastic Response of Ion-Implanted Nickel-Titanium Shape Memory Alloy: Combining Experimentation and Forward Modeling. Open
element formulation involves the linearization of the weak form, computation of the tangent stiffness, and a stress update based on the operator split method. A numerical result is presented to illustrate the accuracy of the finite element…
View article: Phase transformation and mechanical properties of Ti-(10–30)Zr–3Mo–1Sn alloys
Phase transformation and mechanical properties of Ti-(10–30)Zr–3Mo–1Sn alloys Open
View article: Integrated Health Monitoring of Transportation Structures with Magnetic Fe-SMA Wires
Integrated Health Monitoring of Transportation Structures with Magnetic Fe-SMA Wires Open
In this work, the magnetization response of FeMnAlNi superelastic shape memory alloys (SMAs) is investigated under stress. Wires with a diameter of 0.5 mm were subjected to repeated abnormal grain growth heat treatments in order to obtain …
View article: Large Dimension and Low-Cost Fe-SMA Rods
Large Dimension and Low-Cost Fe-SMA Rods Open
The effects on sample size on abnormal grain growth in inexpensive FeMnAlNi shape memory alloy (SMAs) wires and rod were investigated. It was shown that repeated heat treatments between single phase (bcc) and two phase (bcc + fcc) region r…
View article: Innate glycosidic activity in metallic implants for localized synthesis of antibacterial drugs
Innate glycosidic activity in metallic implants for localized synthesis of antibacterial drugs Open
The unexpected discovery presented herein is that industrialized metallic wires can perform conversion of the glucuronide prodrugs with ensuing antibacterial effects.
View article: Influence of Sn on martensitic beta Ti alloys
Influence of Sn on martensitic beta Ti alloys Open
View article: Room-Temperature Deformation and Martensitic Transformation of Two Co-Cr-Based Alloys
Room-Temperature Deformation and Martensitic Transformation of Two Co-Cr-Based Alloys Open
View article: Enzyme Prodrug Therapy Achieves Site-Specific, Personalized Physiological Responses to the Locally Produced Nitric Oxide
Enzyme Prodrug Therapy Achieves Site-Specific, Personalized Physiological Responses to the Locally Produced Nitric Oxide Open
Nitric oxide (NO) is a highly potent but short-lived endogenous radical with a wide spectrum of physiological activities. In this work, we developed an enzymatic approach to the site-specific synthesis of NO mediated by biocatalytic surfac…
View article: Novel high-strength, low-alloys Zn-Mg (< 0.1 wt% Mg) and their arterial biodegradation
Novel high-strength, low-alloys Zn-Mg (< 0.1 wt% Mg) and their arterial biodegradation Open
View article: Continuously Grooved Stent Struts for Enhanced Endothelial Cell Seeding
Continuously Grooved Stent Struts for Enhanced Endothelial Cell Seeding Open
The grooved stent provides a potential percutaneous means to deliver sufficient numbers of viable and functional cells to a vessel segment during vascular intervention. The grooves were found to offer a favorable surface for EC attachment …
View article: Stress-induced phase transformation and room temperature aging in Ti-Nb-Fe alloys
Stress-induced phase transformation and room temperature aging in Ti-Nb-Fe alloys Open
View article: Deformation of a super-elastic NiTiNb alloy with controllable stress hysteresis
Deformation of a super-elastic NiTiNb alloy with controllable stress hysteresis Open
Room temperature deformation of a Ni46.7Ti42.8Nb10.5 alloy was studied by in-situ synchrotron X-ray diffraction. Compared to binary NiTi alloy, the Nb dissolved in the matrix significantly increased the onset stress for Stress-Induced Mart…