A5074245792- Additive Manufacturing Materials and Processes
- Bone Tissue Engineering Materials
- Titanium Alloys Microstructure and Properties
- Additive Manufacturing and 3D Printing Technologies
- High Entropy Alloys Studies
- Bone health and osteoporosis research
- Orthopaedic implants and arthroplasty
- Dental Implant Techniques and Outcomes
- Bone Metabolism and Diseases
- Welding Techniques and Residual Stresses
- Bone health and treatments
- Endodontics and Root Canal Treatments
- Manufacturing Process and Optimization
- Intermetallics and Advanced Alloy Properties
- Cellular Mechanics and Interactions
- Dental materials and restorations
- Cardiovascular Function and Risk Factors
- Advanced materials and composites
- Orthodontics and Dentofacial Orthopedics
- Metal and Thin Film Mechanics
- Muon and positron interactions and applications
- Cellular and Composite Structures
- 3D Printing in Biomedical Research
- Temporomandibular Joint Disorders
- Dental Health and Care Utilization
University of Toyama
2022-2025
Osaka University
2015-2024
Toyama College
2022
Semiconductor Energy Laboratory (Japan)
2021
Kansai University
2021
Sanyo (Japan)
2021
Kobe University
2021
Graduate School USA
2019
Materials Science & Engineering
2004-2018
Nagasaki University
2016
We first successfully achieved the two types of distinct texture control in low-modulus beta-type Ti–15Mo–5Zr–3Al alloy products using selective laser melting. Bidirectional scanning with and without a rotation 90° between layers gave rise to different textures preferential orientations 〈001〉 〈011〉 along building direction, respectively. Control growth behavior columnar cells melt pools via strategies enabled generation such textures. The obtained material exhibits low Young's modulus 68.7 ±...
We first developed a unique "crystallographic lamellar microstructure" (CLM), in which two differently oriented grains appear alternately, 316L stainless steel specimen via selective laser melting technology. The CLM was composed of major 〈011〉 and minor 〈001〉 aligned along the build direction, stemmed from vertical approximately ±45° inclined columnar cells formed central side parts melt-pools, respectively. development found to largely improve material properties strengthening product,...
Additive manufacturing offers an exclusive way of anisotropic microstructure control with a high degree freedom regarding variation in process parameters. This study demonstrates unique texture formation Inconel 718 (IN718) using bidirectional laser scan powder bed fusion (LPBF) for tailoring the mechanical properties. We developed three distinctive textures IN718 LPBF: single-crystal-like (SCM) <110> orientation build direction (BD), crystallographic lamellar (CLM) <110>-oriented main layer...
The strength of bone depends on quantity and quality. Osteocalcin (Ocn) is the most abundant noncollagenous protein in produced by osteoblasts. It has been previously claimed that Ocn inhibits formation also functions as a hormone to regulate insulin secretion pancreas, testosterone synthesis testes, muscle mass. We generated Ocn-deficient (Ocn-/-) mice deleting Bglap Bglap2. Analysis Ocn-/-mice revealed not involved regulation quantity, glucose metabolism, synthesis, or orientation degree...
Abstract The aim of the present study was to assess bone regeneration process in defects introduced into rabbit long bones, which were regenerated with controlled release recombinant morphogenetic protein-2 (rBMP-2). orientation biological apatite (BAp) c-axis and mineral density (BMD) compared as predictors mechanical function. A 20-mm-long defect ulnas, 17 µg rBMP-2 controlled-released using a biodegradable gelatin hydrogel carrier. In process, two characteristic phases may have been...
BioHEAs, specifically designed high entropy alloy (HEA) systems for biomedical applications, represent a new era biometals. However, recent challenges are (1) the poor shape customizability, and (2) inevitable severe segregation due to intrinsic fact that HEA is an ultra-multicomponent system. To achieve customization suppression of elemental simultaneously, we used extremely cooling rate (~107 K/s) selective laser melting (SLM) process. We, first time, developed pre-alloyed...
In recent years, additive manufacturing has attracted attention as a technology that enables control of the crystallographic texture metallic materials. We achieved successful 316L austenitic stainless steel using selective laser melting (SLM). Three distinguished textures were by changing scan speed, namely: single crystalline-like with {001} orientation in build direction, lamellar which two kinds grains {011} and orientations direction are alternately stacked, polycrystalline relatively...
This is the first comprehensive study on development of a cubic crystallographic texture in pure chromium (Cr) manufactured using laser powder bed fusion (LPBF) with different energy densities to alter its microstructure and high-temperature oxidation behavior. An increase density led formation strong texture, which was preferentially oriented (100) plane, there were microstructural improvements Cr. The grain size (100)-oriented Cr larger than that randomly In addition, high-angle boundary...
In metal additive manufacturing, crystallographic orientation control is a promising method for tailoring the functions of metallic parts. However, despite its importance in fabrication texture-controlled functional parts, stability texture not widely discussed. Herein, under laser powder bed fusion was investigated. Two methodologies were employed. One that scanning strategy alternately changed specific number layers. The other "seeding" experiment which single-crystalline substrates with...
We successfully formed the first prominent crystallographic texture of tungsten using laser powder bed fusion (LPBF). It is difficult even to manufacture highly dense products LPBF because its extremely high melting point and thermal conductivity. By tuning process parameters, we succeeded in fabricating almost fully pure parts with a relative density 99.1%, which highest value yet be reported. More importantly, single crystalline-like evolved, <011> preferentially oriented scanning...
Improvement of corrosion resistance austenitic 316L stainless steel via laser powder bed fusion (LPBF) is currently a prominent research topic; however, the effects crystallographic texture and related grain boundary density on LPBF-fabricated parts have not been elucidated.For biomedical applications, control from single crystalline-like to randomly oriented polycrystalline microstructure highly attractive for optimizing mechanical properties (particularly Young's modulus) implants.An...
The present work was aimed at clarifying the stress-shielding effect caused by hip-joint implantation into a femur using human cadaver with cementless hip implant. In particular, bone quality assessed from standpoint of preferential c-axis orientation biological apatite (BAp). Comparing implanted side to non-implanted side, finite element analysis (FEA) indicated that artificial had significant on femur. results also showed marked decrease in degree BAp as well loss medial-proximal This is...
Abstract In clinical dentistry, since fracture is a major cause of tooth loss, better understanding mechanical properties teeth structures important. Dentin, the hard tissue teeth, has similar composition to bone. this study, we investigated human dentin not only in terms mineral density but also using structural and quality parameters as recently accepted evaluating bone strength. Aged crown root (age ≥ 40) exhibited significantly lower flexural strength toughness than young < 40)....
MoSi2 is one of the promising candidates for ultrahigh-temperature structural materials. However, its product fabrication has been limited owing to significant brittleness until now. As an approach overcome this, we have first successfully fabricated samples via additive manufacturing (AM). Control thermal expansion coefficient start plate AM important building a three-dimensional with low deformability. Moreover, unidirectional laser scanning found be significantly effective controlling...
Cancer metastasis to bones increases the risk of fragility fracture by altering bone metabolism and disrupting structure. Osteocytes, which organize a dense network that is closely linked with circumambient matrix, play key role in regulation microstructure material properties. The aim this study was elucidate influence cancer on organization osteocyte collagen/biological apatite (BAp) context osteocyte/matrix coupling. Using mouse model intracardially injected B16F10 melanoma cells or...
Depending on the application, establishing a strategy for selecting type of powder bed fusion technology—from electron beam (EB-PBF) or laser (L-PBF)—is important. In this study, we focused β-type Ti–15Mo–5Zr–3Al alloy (expected hard-tissue implant applications) as model material, and examined variations in microstructure, crystallographic texture, resultant mechanical properties specimens fabricated by L-PBF EB-PBF. Because melting mode transforms from conduction to keyhole with an increase...
A peculiar lattice distortion in a selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al was observed for the first time, through high-precision X-ray diffraction (XRD) analyses. After SLM, exhibited body-centered-tetragonal structure instead of body-centered-cubic structure; c-axis 0.63% shorter than a-axis. The XRD analyses also revealed tensile residual stresses 210 ± 12 MPa at specimen surface. numerical simulation indicated rapid cooling during which could have...