Materials Science in Additive Manufacturing最新文献_第3页

Inconel 718-CoCrMo bimetallic structures through directed energy deposition-based additive manufacturing 利用定向能沉积技术制备Inconel 718-CoCrMo双金属结构

Materials Science in Additive Manufacturing Pub Date : 2022-09-27 DOI: 10.18063/msam.v1i3.18

Cory Groden, V. Champagne, S. Bose, A. Bandyopadhyay

{"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}

引用次数: 4

Optimizing of chemical admixtures for 3D printable cementitious materials by central composite design 用中心复合设计优化3D打印胶凝材料的化学外加剂

Materials Science in Additive Manufacturing Pub Date : 2022-09-21 DOI: 10.18063/msam.v1i3.16

Mingyang Li, Yiwei Weng, Zhixin Liu, Dong Zhang, T. Wong

{"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}

引用次数: 0

Biodegradable materials: Foundation of transient and sustainable electronics 可生物降解材料:瞬态和可持续电子学的基础

Materials Science in Additive Manufacturing Pub Date : 2022-09-21 DOI: 10.18063/msam.v1i3.15

M. Monisha, S. Agarwala

引用次数: 3

Preparation of polyamide 6 and its titanium dioxide photocatalytic composite powders for laser powder bed fusion 激光粉末床熔融用聚酰胺6及其二氧化钛光催化复合粉体的制备

Materials Science in Additive Manufacturing Pub Date : 2022-08-24 DOI: 10.18063/msam.v1i3.14

Peng Chen, Zhaoqing Li, Shengyao Liu, Jin Su, Haoze Wang, Lei Yang, C. Yan, Yusheng Shi

{"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}

引用次数: 4

Process study for directed energy deposition of 316L stainless steel with TiB2 metal matrix composites TiB2金属基复合材料定向能沉积316L不锈钢的工艺研究

Materials Science in Additive Manufacturing Pub Date : 2022-06-29 DOI: 10.18063/msam.v1i2.13

Yao Ting Ang, S. Sing, J. Lim

{"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}

引用次数: 13

Cold spray additive manufacturing of copper-based materials: Review and future directions 铜基材料的冷喷涂增材制造:回顾与未来方向

Materials Science in Additive Manufacturing Pub Date : 2022-06-27 DOI: 10.18063/msam.v1i2.12

V. Menon, Clodualdo Aranas Jr., G. Saha

引用次数: 3

Multi-objective optimization of intense pulsed light sintering process for aerosol jet printed thin film 强脉冲光烧结气溶胶喷射打印薄膜工艺的多目标优化

Materials Science in Additive Manufacturing Pub Date : 2022-06-22 DOI: 10.18063/msam.v1i2.10

G. L. Goh, Haining Zhang, G. D. Goh, W. Yeong, T. H. Chong

{"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}

引用次数: 3

Influence of powder morphology on laser absorption behavior and printability of nanoparticle-coated 90W-Ni-Fe powder during laser powder bed fusion 粉末形貌对纳米包覆90W-Ni-Fe粉末激光吸收性能和可打印性的影响

Materials Science in Additive Manufacturing Pub Date : 2022-06-14 DOI: 10.18063/msam.v1i2.11

Jing Sun, M. Guo, Keyu Shi, D. Gu

{"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}

引用次数: 10

Flexural behavior of 3D printed bio-inspired interlocking suture structures 3D打印仿生联锁缝合结构的弯曲行为

Materials Science in Additive Manufacturing Pub Date : 2022-05-26 DOI: 10.18063/msam.v1i2.9

S. Wickramasinghe, T. Do, P. Tran

引用次数: 8

Editors’ foreword to the inaugural issue of Materials Science in Additive Manufacturing 《增材制造中的材料科学》创刊号的编辑前言

Materials Science in Additive Manufacturing Pub Date : 2022-03-30 DOI: 10.18063/msam.v1i1.2

C. Chua, S. Sing

引用次数: 0