MatSciRN: Process & Device Modeling (Topic)最新文献_第9页

Synthesis and Crystallization Kinetics of Y 2CaA1 4SiO 12 Garnet-Type Glass-Ceramic y2caa1 - 4sio12石榴石型玻璃陶瓷的合成及结晶动力学

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-06-11 DOI: 10.2139/ssrn.3618732

Liyuan Wang, Jiaxi Liu, N. Lu, Zeng-chao Yang, G. He, Xiaoyu Li, Jianqiang Li, Jiangtao Li

引用次数: 0

Kinetics of the Surface-Nucleated Transformation of Spherical Particles and New Model for Grain-Boundary Nucleated Transformations 球形颗粒表面成核转变动力学及晶界成核转变新模型

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-06-04 DOI: 10.2139/ssrn.3628017

N. V. Alekseechkin

{"title":"Kinetics of the Surface-Nucleated Transformation of Spherical Particles and New Model for Grain-Boundary Nucleated Transformations","authors":"N. V. Alekseechkin","doi":"10.2139/ssrn.3628017","DOIUrl":"https://doi.org/10.2139/ssrn.3628017","url":null,"abstract":"Equations for the transformed volume fraction of a spherical particle with nucleation on its surface, both nonisothermal and isothermal, are derived in the framework of Kolmogorov method adapted for this problem. Characteristic parameters governing the transformation kinetics are determined; the latter is studied with particular emphasis on the Avrami exponent temporal behavior. It is shown that the surface-nucleated transformation qualitatively differs from the bulk-nucleated one at large values of the characteristic parameters due to the one-dimensional radial growth of the new phase occurring after the complete transformation of the surface itself at the early stage of the process. This effect also manifests itself in the considered ensemble of size-distributed particles and in the grain-boundary nucleated transformations. The logarithmic normal distribution inherent for the particles obtained by grinding is employed for numerical calculations and shown to stretch temporally the volume-fraction and Avrami-exponent dependences for the ensemble of identical particles. A new model for grain-boundary nucleated transformations alternative to the Cahn model of random planes is offered; it is based on the ensemble of size-distributed spherical particles with the possibility for a growing nucleus to cross grain boundaries. The kinetics of this process is shown to be governed by the same characteristic parameter, as for a single particle, and qualitatively differs from the Cahn-model one. In particular, the logarithmic volume-fraction plot at large values of the governing parameter ends by a characteristic bend observed on experimental curves for the crystallization of bulk metallic glasses. This peculiarity together with the form of the plot as a whole directly indicates to the grain (polycluster) structure of metallic glasses and nucleation at intercluster boundaries.","PeriodicalId":18255,"journal":{"name":"MatSciRN: Process & Device Modeling (Topic)","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73308905","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 Hydrogen at the Interface on Tensile Properties of Equiatomic FeCrNiMnCo High-Entropy Alloy 界面处氢对等原子FeCrNiMnCo高熵合金拉伸性能的影响

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-06-03 DOI: 10.2139/ssrn.3606820

T. Zhu, Z. Zhong, M. Tokitani, X. Ren, B.Y. Wang, X. Cao, Q. Xu

引用次数: 0

Smart Data Glasses For Multimeter 万用表智能数据眼镜

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-05-26 DOI: 10.2139/ssrn.3645375

Anup V. Deshmukh, Akshay Chavan, Rohit Marathe, Prof. Mrs. Pooja Shinde

{"title":"Smart Data Glasses For Multimeter","authors":"Anup V. Deshmukh, Akshay Chavan, Rohit Marathe, Prof. Mrs. Pooja Shinde","doi":"10.2139/ssrn.3645375","DOIUrl":"https://doi.org/10.2139/ssrn.3645375","url":null,"abstract":"Smart glasses demonstrated to be one of the advanced processing gadgets that unit the people and machines. As of late, it is seen that smart glasses have been utilized in the medical and gaming applications. Nonetheless, the highlights of smart glasses can contribute to its administrations in different fields as well. In this paper, a study is carried out to investigate the conceivable use of smart glasses in estimating readings inside a live electrical board, the thing that is inconvenient, and even risky on occasion, is turning away from your hands to peruse your multimeter. Since estimating high AC voltage utilizing conventional digital multimeter is very dangerous as it could prompt genuine mishaps. This paper represents a wearable wireless device so that the user can see readings and this wearable device is the smart glasses. While utilizing these glasses users don’t need to take a gander at DMM show since readings will be shown on smart glasses. Here we have utilized the LiPo battery for power supply to microcontroller. OLED show is utilized for showing the voltage value we estimated. This OLED show is interfaced to the controller utilizing SPI. With the assistance of Bluetooth, we have made this glass wireless so the measured voltage will show up on OLED display.","PeriodicalId":18255,"journal":{"name":"MatSciRN: Process & Device Modeling (Topic)","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89115409","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

Analysis of the Reaction Runaway in Al/Ni Multilayers with Combined Nanocalorimetry and Time-Resolved X-Ray Diffraction 纳米量热法和时间分辨x射线衍射联合分析Al/Ni多层膜反应失控

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-05-22 DOI: 10.2139/ssrn.3581342

T. Neuhauser, G. Tinti, H. Leiste, Nicola Casati, Michael Stüber, K. Woll

{"title":"Analysis of the Reaction Runaway in Al/Ni Multilayers with Combined Nanocalorimetry and Time-Resolved X-Ray Diffraction","authors":"T. Neuhauser, G. Tinti, H. Leiste, Nicola Casati, Michael Stüber, K. Woll","doi":"10.2139/ssrn.3581342","DOIUrl":"https://doi.org/10.2139/ssrn.3581342","url":null,"abstract":"Abstract Self-sustaining runaway reactions in reactive multilayers exhibit heat-up with over 106 K/s to temperatures of higher than 1000 °C, which defines unprecedented kinetic regimes for metallurgical phase transformations. The latter allows for developing alternative concepts for microstructure design. In order to explore the phase transformations in these kinetic regimes, we combine nanocalorimetry with time-resolved synchrotron X-ray diffraction. Nanocalorimetry allows us to perform thermal analysis of ignition as well as the reaction runaway and to develop necessary and mandatory quantitative criterions for ignition. In order to trace the temporal phase evolution, we use time-resolved synchrotron X-ray diffraction. We heat the Al/Ni multilayers with 5000 K/s and find that Ni starts to diffuse into the Al layer at 271 °C. Ignition occurs, dependent on the bilayer thickness, at about 400 °C in the solid state and atomic diffusion is revealed as the dominating mechanism. During the runaway, samples heat up in four stages with maximal 106 K/s to 1100 °C. Ni2Al3 is the first phase to form which starts to nucleate once Al melts. The majority of the intermetallic phase grows after the runaway reaction in the fourth stage and reaches its maximum during cooling. This trend of the temporal phase evolution eventually enables us to propose a mechanism exhibiting conceptual similarities with the exothermic dissolution mechanism recently suggested for self-sustaining reaction fronts in Al/Ni multilayers.","PeriodicalId":18255,"journal":{"name":"MatSciRN: Process & Device Modeling (Topic)","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73081286","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: 6

Synthesis and Characterization of Optically Transparent Ceramic Crystalline/Amorphous and Amorphous/Amorphous Multilayers 光学透明陶瓷晶体/非晶和非晶/非晶多层膜的合成与表征

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-05-21 DOI: 10.2139/ssrn.3603425

Chelsea D. Appleget, A. Hodge

引用次数: 4

Inoculation Treatment of an Additively Manufactured 2024 Aluminium Alloy with Titanium Nanoparticles 纳米钛孕育处理增材制备2024铝合金

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-05-18 DOI: 10.2139/ssrn.3592041

Qiyang Tan, Jingqi Zhang, Qiang Sun, Z. Fan, Gan Li, Yu Yin, Yingang Liu, Mingxing Zhang

{"title":"Inoculation Treatment of an Additively Manufactured 2024 Aluminium Alloy with Titanium Nanoparticles","authors":"Qiyang Tan, Jingqi Zhang, Qiang Sun, Z. Fan, Gan Li, Yu Yin, Yingang Liu, Mingxing Zhang","doi":"10.2139/ssrn.3592041","DOIUrl":"https://doi.org/10.2139/ssrn.3592041","url":null,"abstract":"Abstract Considerable studies on metal selective laser melting (SLM) have proved the necessity to refine microstructure parts fabricated by SLM in order to eliminate property anisotropy, hot-tearing and to increase the SLM-processability. In the present work, Ti nanoparticles, at the first time, were discovered to be an extremely effective inoculant for an SLMed 2024 aluminium alloy. 0.7 wt% addition of Ti nanoparticles was capable of substantially eliminating the hot-tearing cracks and columnar structure, and refining the grains in the SLMed 2024 alloy in a broad processing window. The substantial grain refinement in the Ti-inoculated 2024 alloy was attributed to the in-situ formation of Al3Ti nanoparticles with a L12 ordered structure, which formed a coherent interface with Al matrix and therefore significantly promoted the heterogeneous nucleation of the α-Al during solidification of melt pools in the SLM process. After a conventional T6 heat treatment, this SLMed alloy exhibited a superior balance of strength and ductility (tensile strength was up to 432 ± 20 MPa and elongation of 10 ± 0.8%), which was comparable to its wrought counterpart. This work can be considered as a breakthrough in research of fabricating high-strength aluminium alloys using SLM.","PeriodicalId":18255,"journal":{"name":"MatSciRN: Process & Device Modeling (Topic)","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82027491","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: 186

In Situ Microstructural Evolution in Fcc and Bcc Complex Concentrated Solid-Solution Alloys Under Heavy Ion Irradiation Fcc和Bcc复合浓固溶合金在重离子辐照下的原位组织演变

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-05-18 DOI: 10.2139/ssrn.3591845

C. Parkin, M. Moorehead, M. Elbakhshwan, A. Couet, K. Sridharan, Wei-Ying Chen, Meimei Li, Lingfeng He

{"title":"In Situ Microstructural Evolution in Fcc and Bcc Complex Concentrated Solid-Solution Alloys Under Heavy Ion Irradiation","authors":"C. Parkin, M. Moorehead, M. Elbakhshwan, A. Couet, K. Sridharan, Wei-Ying Chen, Meimei Li, Lingfeng He","doi":"10.2139/ssrn.3591845","DOIUrl":"https://doi.org/10.2139/ssrn.3591845","url":null,"abstract":"This study characterizes the microstructural evolution of single-phase complex concentrated solid-solution alloy (CSA) compositions under heavy ion irradiation with the goal of evaluating mechanisms for CSA radiation tolerance in advanced fission systems. Three such alloys, Cr18Fe27Mn27Ni28, Cr15Fe35Mn15Ni35, and equimolar NbTaTiV, along with reference materials (pure Ni and E90 for the CrFeMnNi family and pure V for NbTaTiV) were irradiated at 50 K and 773 K with 1 MeV Kr++ ions to various levels of dpa using in-situ TEM. Cryogenic irradiation resulted in small defect clusters and faulted dislocation loops as large as 12 nm in FCC CSAs. With thermal diffusion suppressed at cryogenic temperatures, defect densities were lower in all CSAs than in their less compositionally complex reference materials indicating that point defect accumulation is reduced during the displacement cascade stage. High temperature irradiation of the two FCC CSA resulted in the formation of interstitial dislocation loops which by 2 dpa grew to an average size of 27 nm in Cr18Fe27Mn27Ni28 and 10 nm in Cr15Fe35Mn15Ni35. This difference in loop growth kinetics was attributed to the difference in Mn-content due to its effect on the nucleation rate by increasing vacancy mobility or reducing the stacking-fault energy.","PeriodicalId":18255,"journal":{"name":"MatSciRN: Process & Device Modeling (Topic)","volume":"104 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76113856","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

Wind Turbine Power Curve Modelling using Robust Regression Techniques 基于鲁棒回归技术的风力发电功率曲线建模

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-05-09 DOI: 10.2139/ssrn.3597161

Neel Pandey

引用次数: 0

Detecting Features via Modified Harris Corners and Matching Them through SIFT 利用改进的哈里斯角检测特征并进行SIFT匹配

MatSciRN: Process & Device Modeling (Topic) Pub Date : 2020-05-02 DOI: 10.2139/ssrn.3619887

Jimut Bahan Pal

引用次数: 0