Cory Groden, V. Champagne, S. Bose, A. Bandyopadhyay
Bimetallic structures and coatings through additive manufacturing (AM) have demonstrated a high degree of freedom for tailoring properties depending on the application. In this study, Inconel 718 and CoCrMo were used as both are common alloys and exhibit unique properties, such as high-temperature oxidation, wear, and fatigue resistance. Using directed energy deposition-based metal AM, bimetallic structures containing these two alloys were manufactured, and the resulting structures exhibited no intermetallic phase formation, cracking, or porosity. Scanning electron microscopy and energy dispersive spectroscopy revealed a smooth elemental transition between the two compositions. Hardness testing showed a linear transition in the interfacial zone, validating no brittle intermetallic phase formation. Compression testing and fracture surface analysis revealed that the failures were not dependent on the interface properties. High-temperature oxidation showed no distinct effect on the interface, a firmly attached chromium oxide layer on the Inconel 718 side and a loosely attached chromium oxide layer on the CoCrMo side. There was also evidence of pit formation on the Inconel 718 surface, but not on the CoCrMo. These findings confirm a stable bimetallic system in which one of the two alloys can be used on the other material to improve the structure’s high-temperature oxidation or wear/corrosion resistance.
{"title":"Inconel 718-CoCrMo bimetallic structures through directed energy deposition-based additive manufacturing","authors":"Cory Groden, V. Champagne, S. Bose, A. Bandyopadhyay","doi":"10.18063/msam.v1i3.18","DOIUrl":"https://doi.org/10.18063/msam.v1i3.18","url":null,"abstract":"Bimetallic structures and coatings through additive manufacturing (AM) have demonstrated a high degree of freedom for tailoring properties depending on the application. In this study, Inconel 718 and CoCrMo were used as both are common alloys and exhibit unique properties, such as high-temperature oxidation, wear, and fatigue resistance. Using directed energy deposition-based metal AM, bimetallic structures containing these two alloys were manufactured, and the resulting structures exhibited no intermetallic phase formation, cracking, or porosity. Scanning electron microscopy and energy dispersive spectroscopy revealed a smooth elemental transition between the two compositions. Hardness testing showed a linear transition in the interfacial zone, validating no brittle intermetallic phase formation. Compression testing and fracture surface analysis revealed that the failures were not dependent on the interface properties. High-temperature oxidation showed no distinct effect on the interface, a firmly attached chromium oxide layer on the Inconel 718 side and a loosely attached chromium oxide layer on the CoCrMo side. There was also evidence of pit formation on the Inconel 718 surface, but not on the CoCrMo. These findings confirm a stable bimetallic system in which one of the two alloys can be used on the other material to improve the structure’s high-temperature oxidation or wear/corrosion resistance.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130562332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mingyang Li, Yiwei Weng, Zhixin Liu, Dong Zhang, T. Wong
Printability of 3D printable cementitious materials is related to material rheological properties, and is affected and controlled by modern concrete chemical admixtures. In this work, the influence of several chemical admixtures including superplasticizer, retarder, and accelerator on the rheological characteristics of printable materials was investigated using central composite design (CCD). Twenty test points with varying dosages of chemical admixtures were performed to evaluate the primary effects of chemical admixtures and their combined interactive effects on the rheological properties. The results indicate that with the increase of retarder or superplasticizer dosage, all rheological parameters decrease while accelerator possesses an opposite impact. The rheological properties are negatively proportional to the combined interactive effect of retarder and accelerator. The combined interactive effect of retarder and superplasticizer positively affects dynamic yield stress, plastic viscosity, and thixotropy, while it negatively impacts static yield stress. The combined interactive effect of accelerator and retarder positively affects the yield stress, whereas it negatively influences the plastic viscosity and thixotropy. The results indicate that the CCD is an efficient method to find the desirable formulation within a given boundary.
{"title":"Optimizing of chemical admixtures for 3D printable cementitious materials by central composite design","authors":"Mingyang Li, Yiwei Weng, Zhixin Liu, Dong Zhang, T. Wong","doi":"10.18063/msam.v1i3.16","DOIUrl":"https://doi.org/10.18063/msam.v1i3.16","url":null,"abstract":"Printability of 3D printable cementitious materials is related to material rheological properties, and is affected and controlled by modern concrete chemical admixtures. In this work, the influence of several chemical admixtures including superplasticizer, retarder, and accelerator on the rheological characteristics of printable materials was investigated using central composite design (CCD). Twenty test points with varying dosages of chemical admixtures were performed to evaluate the primary effects of chemical admixtures and their combined interactive effects on the rheological properties. The results indicate that with the increase of retarder or superplasticizer dosage, all rheological parameters decrease while accelerator possesses an opposite impact. The rheological properties are negatively proportional to the combined interactive effect of retarder and accelerator. The combined interactive effect of retarder and superplasticizer positively affects dynamic yield stress, plastic viscosity, and thixotropy, while it negatively impacts static yield stress. The combined interactive effect of accelerator and retarder positively affects the yield stress, whereas it negatively influences the plastic viscosity and thixotropy. The results indicate that the CCD is an efficient method to find the desirable formulation within a given boundary.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126384536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Biodegradable materials are designed to degrade in a desired time either through the action of microorganisms or under certain physical conditions. The driving force behind the rise of biodegradable materials is the growing problem of electronic waste (e-waste), low recyclability, and toxicity of electronic materials. Transient response of biodegradable materials has found application in next-generation health-care and biomedical devices. Advances in material science and manufacturing technique have pushed the envelope of innovation further. This review discusses different biodegradable material classes that have emerged to replace the traditional non-biodegradable materials in electronics. Focus has been given to conversion of biodegradable materials to inks and pastes that find use in printed electronics to create flexible, bendable, soft, and degradable devices. Material degradation behavior and dissolution chemistries have been illustrated to understand their impact on electrical performance of devices. Finally, some short-term and long-term challenges are pointed out to overcome the commercialization barrier.
{"title":"Biodegradable materials: Foundation of transient and sustainable electronics","authors":"M. Monisha, S. Agarwala","doi":"10.18063/msam.v1i3.15","DOIUrl":"https://doi.org/10.18063/msam.v1i3.15","url":null,"abstract":"Biodegradable materials are designed to degrade in a desired time either through the action of microorganisms or under certain physical conditions. The driving force behind the rise of biodegradable materials is the growing problem of electronic waste (e-waste), low recyclability, and toxicity of electronic materials. Transient response of biodegradable materials has found application in next-generation health-care and biomedical devices. Advances in material science and manufacturing technique have pushed the envelope of innovation further. This review discusses different biodegradable material classes that have emerged to replace the traditional non-biodegradable materials in electronics. Focus has been given to conversion of biodegradable materials to inks and pastes that find use in printed electronics to create flexible, bendable, soft, and degradable devices. Material degradation behavior and dissolution chemistries have been illustrated to understand their impact on electrical performance of devices. Finally, some short-term and long-term challenges are pointed out to overcome the commercialization barrier.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131814819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Peng Chen, Zhaoqing Li, Shengyao Liu, Jin Su, Haoze Wang, Lei Yang, C. Yan, Yusheng Shi
Laser powder bed fusion (LPBF) additive manufacturing is an effective method to prepare three-dimensional ordered network titanium dioxide (TiO2) photocatalytic materials, therefore enhancing the absorption intensity of incident light and improving the photocatalytic efficiency. However, TiO2 is difficult to be directly sintered by LPBF due to the high melting point and brittleness. In this study, we prepared a polyamide 6 (PA6)-coated TiO2 photocatalytic composite powder for LPBF based on the dissolution precipitation polymer coating (DPPC) method and evaluated its LPBF processability. In the precipitation process of PA6, there was a significant crystallization exotherm with temperature recovery. Effective temperature control of this precipitation process had a significant effect on the morphology and particle size distribution of the precipitated powder. The increase of the dissolved concentration of PA6 to 150 g/L produced an obvious temperature gradient of the reactor, resulting in a wide particle size distribution and a powder with a characteristic porous surface. The prepared PA6/TiO2 composite powder presents a near-spherical porous-surfaced morphology, a high specific surface area of 240.5 m2/kg, an appropriate Dv(50) of 48.8 μm, and a wide sintering window of 26.6°C, indicating a good LPBF processability and potential of the photocatalytic application.
{"title":"Preparation of polyamide 6 and its titanium dioxide photocatalytic composite powders for laser powder bed fusion","authors":"Peng Chen, Zhaoqing Li, Shengyao Liu, Jin Su, Haoze Wang, Lei Yang, C. Yan, Yusheng Shi","doi":"10.18063/msam.v1i3.14","DOIUrl":"https://doi.org/10.18063/msam.v1i3.14","url":null,"abstract":"Laser powder bed fusion (LPBF) additive manufacturing is an effective method to prepare three-dimensional ordered network titanium dioxide (TiO2) photocatalytic materials, therefore enhancing the absorption intensity of incident light and improving the photocatalytic efficiency. However, TiO2 is difficult to be directly sintered by LPBF due to the high melting point and brittleness. In this study, we prepared a polyamide 6 (PA6)-coated TiO2 photocatalytic composite powder for LPBF based on the dissolution precipitation polymer coating (DPPC) method and evaluated its LPBF processability. In the precipitation process of PA6, there was a significant crystallization exotherm with temperature recovery. Effective temperature control of this precipitation process had a significant effect on the morphology and particle size distribution of the precipitated powder. The increase of the dissolved concentration of PA6 to 150 g/L produced an obvious temperature gradient of the reactor, resulting in a wide particle size distribution and a powder with a characteristic porous surface. The prepared PA6/TiO2 composite powder presents a near-spherical porous-surfaced morphology, a high specific surface area of 240.5 m2/kg, an appropriate Dv(50) of 48.8 μm, and a wide sintering window of 26.6°C, indicating a good LPBF processability and potential of the photocatalytic application.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124114738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In addition to laser powder bed fusion, directed energy deposition (DED) is also gaining interest as an effective metal additive manufacturing technique. Due to its system configuration, it is more efficient and flexible for materials development. Therefore, it can be used for processing of metal matrix composites (MMCs) through the use of powder mixture as feedstock. 316L stainless steel has high corrosion resistance, biocompatibility, and ductility. Several studies have shown the feasibility of using DED to process 316L stainless steel. The material properties of 316L stainless steel can be improved using reinforcement particles such as TiB2 to form MMCs. In this study, the effects of process parameters on microstructure and mechanical properties of 316L stainless steel reinforced with TiB2 (316L/TiB2) MMC were studied. The process parameters, including laser power, scanning speed, and hopper speed, were varied and analyzed using Taguchi L9 array. It was found that the process parameters have insignificant effect on the bulk density of the samples produced. Through this study, it is also found that tumble mixing was not suitable for the powder feedstock preparation for MMCs to be processed by DED. The microstructure of DED 316L/TiB2 MMC samples consists of columnar and equiaxed grains. Columnar grains were located within the layers while equiaxed grains were located at the interlayer zones. Fine sub-grains were also observed within these grains and their boundaries were enriched with molybdenum and chromium segregations. Precipitates containing titanium were also observed to segregate at the sub-grain boundaries. Finally, the Vickers microhardness of the DED 316L/TiB2 MMC was found to be similar to pure 316L stainless steel produced by DED.
{"title":"Process study for directed energy deposition of 316L stainless steel with TiB2 metal matrix composites","authors":"Yao Ting Ang, S. Sing, J. Lim","doi":"10.18063/msam.v1i2.13","DOIUrl":"https://doi.org/10.18063/msam.v1i2.13","url":null,"abstract":"In addition to laser powder bed fusion, directed energy deposition (DED) is also gaining interest as an effective metal additive manufacturing technique. Due to its system configuration, it is more efficient and flexible for materials development. Therefore, it can be used for processing of metal matrix composites (MMCs) through the use of powder mixture as feedstock. 316L stainless steel has high corrosion resistance, biocompatibility, and ductility. Several studies have shown the feasibility of using DED to process 316L stainless steel. The material properties of 316L stainless steel can be improved using reinforcement particles such as TiB2 to form MMCs. In this study, the effects of process parameters on microstructure and mechanical properties of 316L stainless steel reinforced with TiB2 (316L/TiB2) MMC were studied. The process parameters, including laser power, scanning speed, and hopper speed, were varied and analyzed using Taguchi L9 array. It was found that the process parameters have insignificant effect on the bulk density of the samples produced. Through this study, it is also found that tumble mixing was not suitable for the powder feedstock preparation for MMCs to be processed by DED. The microstructure of DED 316L/TiB2 MMC samples consists of columnar and equiaxed grains. Columnar grains were located within the layers while equiaxed grains were located at the interlayer zones. Fine sub-grains were also observed within these grains and their boundaries were enriched with molybdenum and chromium segregations. Precipitates containing titanium were also observed to segregate at the sub-grain boundaries. Finally, the Vickers microhardness of the DED 316L/TiB2 MMC was found to be similar to pure 316L stainless steel produced by DED.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117189746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The cold gas dynamic spray process is a manufacturing process strategically designed for coatings. The conditions for the deposition of materials to form coatings have evolved over several decades. Copper and copper-based cold spray coatings are an interesting field for investigation, as it has substantial commercial demand and acceptance. Several important works have already been performed in this regard that shows the immense popularity of its applications in power industries. Cold gas dynamic spray, being an economic process, can produce coatings with superior quality and low oxidation. In this paper, a particular focus has been given to copper-based cold spray coatings along with their deposition parameters. The various mechanical, electrical, corrosion, and tribological properties of these copper-based cold spray coatings are commendable and economically lucrative. A good amount of experimental data has also been included in this review article to provide comprehensive information and future scope of research about copper-based cold spray coatings.
{"title":"Cold spray additive manufacturing of copper-based materials: Review and future directions","authors":"V. Menon, Clodualdo Aranas Jr., G. Saha","doi":"10.18063/msam.v1i2.12","DOIUrl":"https://doi.org/10.18063/msam.v1i2.12","url":null,"abstract":"The cold gas dynamic spray process is a manufacturing process strategically designed for coatings. The conditions for the deposition of materials to form coatings have evolved over several decades. Copper and copper-based cold spray coatings are an interesting field for investigation, as it has substantial commercial demand and acceptance. Several important works have already been performed in this regard that shows the immense popularity of its applications in power industries. Cold gas dynamic spray, being an economic process, can produce coatings with superior quality and low oxidation. In this paper, a particular focus has been given to copper-based cold spray coatings along with their deposition parameters. The various mechanical, electrical, corrosion, and tribological properties of these copper-based cold spray coatings are commendable and economically lucrative. A good amount of experimental data has also been included in this review article to provide comprehensive information and future scope of research about copper-based cold spray coatings.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127432417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. L. Goh, Haining Zhang, G. D. Goh, W. Yeong, T. H. Chong
The sintering of printed nanoparticle films is a necessary processing step for most nanoparticle inks to make the printed film functional. The sintering of nanoparticle is usually performed through thermal sintering, photonic sintering, induction sintering, etc. Intense pulsed light (IPL) sintering method is one of the most popular sintering methods for nanoparticle inks due to the fast and effective process, but it may yield mediocre performance if improper sintering parameters are used. In this work, we investigate the correlation between the two factors which are the print passes of aerosol jet printing and the sintering distance of the samples on the effect of the surface morphology and sheet resistance. A contradictory correlation between the two factors was observed and a multi-objective optimization was carried out using machine learning method to identify the most optimum conditions for both factors. We found that multi-objective optimization approach is effective in reducing the conflicting responses, thus the sintered thin film can have low sheet resistance and low surface roughness. This work provides an essential guide for achieving conductive films with electrical conductivity and low surface roughness using IPL sintering process for fast fabrication of multi-layered electronics such as electrochemical electrodes.
{"title":"Multi-objective optimization of intense pulsed light sintering process for aerosol jet printed thin film","authors":"G. L. Goh, Haining Zhang, G. D. Goh, W. Yeong, T. H. Chong","doi":"10.18063/msam.v1i2.10","DOIUrl":"https://doi.org/10.18063/msam.v1i2.10","url":null,"abstract":"The sintering of printed nanoparticle films is a necessary processing step for most nanoparticle inks to make the printed film functional. The sintering of nanoparticle is usually performed through thermal sintering, photonic sintering, induction sintering, etc. Intense pulsed light (IPL) sintering method is one of the most popular sintering methods for nanoparticle inks due to the fast and effective process, but it may yield mediocre performance if improper sintering parameters are used. In this work, we investigate the correlation between the two factors which are the print passes of aerosol jet printing and the sintering distance of the samples on the effect of the surface morphology and sheet resistance. A contradictory correlation between the two factors was observed and a multi-objective optimization was carried out using machine learning method to identify the most optimum conditions for both factors. We found that multi-objective optimization approach is effective in reducing the conflicting responses, thus the sintered thin film can have low sheet resistance and low surface roughness. This work provides an essential guide for achieving conductive films with electrical conductivity and low surface roughness using IPL sintering process for fast fabrication of multi-layered electronics such as electrochemical electrodes.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"56 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120870944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work, mesoscopic simulation and experimental studies were applied to investigate the influence of powder morphology and characteristics on laser absorption behavior and printability of nanoparticle-coated 90W-Ni-Fe powder during laser powder bed fusion (LPBF). The mechanism of laser-material interaction and the thermal behavior of molten fluid during LPBF were revealed, thereby optimizing the powder preparation parameters. It showed that when the powder preparation parameters were optimized (i.e., ball-to-powder weight ratio of 1:2, milling speed of 250 rpm, and milling time of 6 h), the Ni and Fe nanoparticles were uniformly dispersed on W particles and, meanwhile, the sufficiently high sphericity of the W matrix particles was maintained. The nanoparticle-coated 90W-Ni-Fe powder had a sound laser absorption behavior with laser absorptivity of 93.51%, leading to the high LPBF printing quality with a smooth surface free of balling phenomenon and microcracks. Specimen fabricated using optimally prepared powder has a high density of 98% and a low surface roughness of 7.91 μm. The LPBF-processed 90W-Ni-Fe alloys had a uniform hardness distribution with an average value of 439.47 HV1 and significantly enhanced compression properties with compressive strength of 1255.35 MPa and an elongation of 24.74%. The results in this work provided a physical understanding of complex and interdependent laser-powder interaction and melt pool formation mechanisms during LPBF of W-based alloys that are governed by powder characteristics.
{"title":"Influence of powder morphology on laser absorption behavior and printability of nanoparticle-coated 90W-Ni-Fe powder during laser powder bed fusion","authors":"Jing Sun, M. Guo, Keyu Shi, D. Gu","doi":"10.18063/msam.v1i2.11","DOIUrl":"https://doi.org/10.18063/msam.v1i2.11","url":null,"abstract":"In this work, mesoscopic simulation and experimental studies were applied to investigate the influence of powder morphology and characteristics on laser absorption behavior and printability of nanoparticle-coated 90W-Ni-Fe powder during laser powder bed fusion (LPBF). The mechanism of laser-material interaction and the thermal behavior of molten fluid during LPBF were revealed, thereby optimizing the powder preparation parameters. It showed that when the powder preparation parameters were optimized (i.e., ball-to-powder weight ratio of 1:2, milling speed of 250 rpm, and milling time of 6 h), the Ni and Fe nanoparticles were uniformly dispersed on W particles and, meanwhile, the sufficiently high sphericity of the W matrix particles was maintained. The nanoparticle-coated 90W-Ni-Fe powder had a sound laser absorption behavior with laser absorptivity of 93.51%, leading to the high LPBF printing quality with a smooth surface free of balling phenomenon and microcracks. Specimen fabricated using optimally prepared powder has a high density of 98% and a low surface roughness of 7.91 μm. The LPBF-processed 90W-Ni-Fe alloys had a uniform hardness distribution with an average value of 439.47 HV1 and significantly enhanced compression properties with compressive strength of 1255.35 MPa and an elongation of 24.74%. The results in this work provided a physical understanding of complex and interdependent laser-powder interaction and melt pool formation mechanisms during LPBF of W-based alloys that are governed by powder characteristics.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114564777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Additive manufacturing has allowed producing various complex structures inspired by natural materials. In this research, the bio-inspired suture structure was 3D printed using the fused deposition modeling printing technique to study its bending response behavior. Suture is one of the most commonly found structures in biological bodies. The primary purpose of this structure in nature is to improve flexibility by absorbing energy without causing permeant damage to the biological structure. An interesting discovery of the suture joint in diabolical ironclad beetle has given a great opportunity to further study the behavior of these natural suture designs. Inspired by the elliptical shape and the interlocking features of this suture, specimens were designed and 3D printed using polylactic acid thermoplastic polymer. A three-point bending test was then conducted to analyze the flexural behavior of each suture design, while digital image correlation and numerical simulation were performed to capture the insights of deformation process.
{"title":"Flexural behavior of 3D printed bio-inspired interlocking suture structures","authors":"S. Wickramasinghe, T. Do, P. Tran","doi":"10.18063/msam.v1i2.9","DOIUrl":"https://doi.org/10.18063/msam.v1i2.9","url":null,"abstract":"Additive manufacturing has allowed producing various complex structures inspired by natural materials. In this research, the bio-inspired suture structure was 3D printed using the fused deposition modeling printing technique to study its bending response behavior. Suture is one of the most commonly found structures in biological bodies. The primary purpose of this structure in nature is to improve flexibility by absorbing energy without causing permeant damage to the biological structure. An interesting discovery of the suture joint in diabolical ironclad beetle has given a great opportunity to further study the behavior of these natural suture designs. Inspired by the elliptical shape and the interlocking features of this suture, specimens were designed and 3D printed using polylactic acid thermoplastic polymer. A three-point bending test was then conducted to analyze the flexural behavior of each suture design, while digital image correlation and numerical simulation were performed to capture the insights of deformation process.","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132183448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
From rapid prototyping to additive manufacturing (AM), as it is formally known today, the development of these advanced manufacturing techniques has been complemented with rapid research and innovations in materials science. The requirements for appropriate process and the selection of suitable materials that can be processed by this process are critical for AM applications. As AM matures, specific classes of material have become associated with their corresponding AM processes and applications. Conventionally, AM materials include metals[1], polymers[2], and ceramics[3,4] that have been applied to manufacturing functional parts in high-value industries such as biomedical and aerospace. With recent advancements, biomaterials such as living cells and tissues for 3D bioprinting[5,6] and even edible materials for 3D food printing[7,8] have garnered significant attention. Development of these materials are still ongoing, which drives new frontiers in AM, such as multi-material 3D printing[9-12], artificial intelligence for material design[13], and 4D printing, which incorporate the use of smart materials[14,15].
{"title":"Editors’ foreword to the inaugural issue of Materials Science in Additive Manufacturing","authors":"C. Chua, S. Sing","doi":"10.18063/msam.v1i1.2","DOIUrl":"https://doi.org/10.18063/msam.v1i1.2","url":null,"abstract":"From rapid prototyping to additive manufacturing (AM), as it is formally known today, the development of these advanced manufacturing techniques has been complemented with rapid research and innovations in materials science. The requirements for appropriate process and the selection of suitable materials that can be processed by this process are critical for AM applications. As AM matures, specific classes of material have become associated with their corresponding AM processes and applications. Conventionally, AM materials include metals[1], polymers[2], and ceramics[3,4] that have been applied to manufacturing functional parts in high-value industries such as biomedical and aerospace. With recent advancements, biomaterials such as living cells and tissues for 3D bioprinting[5,6] and even edible materials for 3D food printing[7,8] have garnered significant attention. Development of these materials are still ongoing, which drives new frontiers in AM, such as multi-material 3D printing[9-12], artificial intelligence for material design[13], and 4D printing, which incorporate the use of smart materials[14,15].","PeriodicalId":422581,"journal":{"name":"Materials Science in Additive Manufacturing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130019760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：