检索结果-内蒙古大学图书馆

Modelling and experimental validation of TIG welding of INCONEL 718

materials Today: Proceedings 2021年 37卷 1917-1931页

作者： S. Tamil Prabakaran P. Sakthivel Mohanraj Shanmugam S. Satish M. Muniyappan V.S. Shaisundaram Department of Mechanical Engineering Government College of Engineering Bargur Tamilnadu India Department of Automobile Engineering Easwari Engineering College Chennai India Department of Materials Engineering and Nanotechnology Politecnico di Milano Milan Italy Department of Automobile Engineering Kumaraguru College of Technology Coimbatore India Department of Automobile Engineering Vels Institute of Science Technology and Advanced Studies Chennai India

The overall aim behind the work presented in this thesis is to gain and apply an understanding of the coupled mechanical and metallurgical effects of TIG welding of nickel-base super alloy (IN718) by using experimentally validated finite element model , which employed for identify the location and size of recrystallized zone (HAZ) and hot cracking susceptible zone in HAZ. • To develop an efficient and reliable Finite Element Model of TIG welding moving heat source and proper validation based on the experimental measurements. • To experimental validation of thermal cycle predicted by FE model and study the data acquisition (DAQ) process and effectiveness of thermocouple. • To analyze the thermal stress distribution pattern, FZ size and HAZ size by using finite element model. • To investigate the susceptibility of HAZ hot cracking in INCONEL 718 weldment using FEM solutions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Microwave sinterability of pure and CuO doped ZnO macroporous ceramic foams with deposited zinc oxide nanoparticles produced by bioinspired replica technique 18

Microwave sinterability of pure and CuO doped ZnO macroporou...

引用

18th International Conference on Microwave and High Frequency Applications, AMPERE 2021

作者： Cardoso, A.L.F. Maestrelli, S.C. Perdomo, C.P.F. Kiminami, R.H.G.A. Gunnewiek, R.F.K. Federal University of São Carlos Post Graduate Program in Materials Science and Engineering rod. Washington Luiz km 235 SP São Carlos13565-905 Brazil km 533 MG Poços de Caldas 37715-400 Brazil

Macroporous open-celled ceramic foams finds applications in numerous technological fields, like particle filters, insulating coatings, porous support for catalyst and photocatalyst processes, and even photoelectrochemical applications. In latter two, a macroporous open cell structure favors photoelectrochemical and photocatalyst reactions, due to its higher surface area. Many methods are used for producing these types of ceramics, specially the replica technique. In this simple method, the samples are obtained by impregnating a highly porous polymeric foam with a high solid loading ceramic slurry. After thermal treatment, the macroporous ceramic presents the structure of the polymeric foam used as template. Exceptionally complex and regular geometries can also be found in nature, which is the case of the Luffa sp sponge, that can replace the use of synthetic polymeric foams. In this work, microwave sinterability of porous ceramics obtained by impregnation of high solid loading ceramic slurries of nanostructured zinc oxide in natural Luffa sp fibrous sponges. Carboxymethyl cellulose (CMC), xanthan gum (XG) and polyvinyl alcohol (PVA) were assessed as binder agents. Ceramic slurries were prepared by dispersing nanostructured zinc oxide in distilled water (70% wt. ratio) using ammonium polyacrilate (APA) as deflocculant, followed by mixing in a high shear mixer (IKA Ultra-Turrax T25) for 10 minutes. After homogenization, binders were added and mixed in mechanical mixer for 10 minutes. The sponges (with dimensions of 2x2x1 cm) were carefully immersed in the ceramic slurry, squeezed to remove excess and then left to dry 24h in air. The dried ceramic foams were microwave heated at 550 °C during 10 minutes with 100 °C/min heating rate, followed by microwave sintering at 1150 and 1200 °C during 15 minutes with a 100 °C/min heating rate. The microwave sintered samples were analyzed by optical and scanning electron microscopy, photocatalysis efficiency and density measurement

关键词： Microwave heating

来源：评论

学校读者我要写书评

暂无评论

The static structural analysis of torque converter material for better performance by changing the stator angle

引用

materials Today: Proceedings 2021年 37卷 1963-1972页

作者： S. Saravanakumar Naveen Kumar Chandramohan S. Tamil Prabakaran M. Muniyappan Mohanraj Shanmugam VS. Shaisundaram Department of Automobile Engineering Easwari Engineering College Chennai India Department of Automobile Engineering Kumaraguru College of Technology Coimbatore India Department of Mechanical Engineering Government College of Engineering Bargur Tamilnadu India Department of Materials Engineering and Nanotechnology Politecnico di Milano Milan Italy Department of Automobile Engineering Vels Institute of Science Technology and Advanced Studies Chennai India

Torque converter is a commonly used machine device in automobiles to transmit the rotating power from a source like I.C engine, to a rotating driven load. It is widely used in automatic transmission vehicles to change the speed from the engine to the transmission and also multiply the torque. Effective modeling of torque converters leads to increase the performance and efficiency. The inlet and outlet blade angles take part in a significant role in determining the performance and efficiency of a torque converter. In this paper the performance of torque converter has been evaluated by changing the angle of stator blades by using ANSYS software. Four torque converter with different stator blade angle (15°, 25°, 35°, 40°) are designed and simulated to investigate the effects of blade angles on their overall performance and efficiency.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optical study of the topological materials LnSbTe (Ln=La, Ce, Sm, Gd)

引用

Physical Review B 2022年第24期106卷 245145-245145页

作者： Li Ye Cao Meng Yang Le Wang Yong Li Bi Xia Gao Lei Wang Jia Lun Liu Ai Fang Fang You Guo Shi Rong Yan Chen Center for Advanced Quantum Studies Department of Physics Beijing Normal University Beijing 100875 China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China Shenzhen Institute for Quantum Science and Engineering Department of Physics Southern University of Science and Technology Shenzhen 518055 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100190 China Department of Physics Beijing Normal University Beijing 100875 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

The interaction among nontrivial topology, symmetry breaking orders, and strong electron correlation could generate many exotic physical phenomena. Recently, charge-density wave (CDW) orders and the Kondo effect are reported to occur in some of the LnSbTe compounds, which are suggested to be either topological insulators or topological semimetals. Here we perform optical spectroscopic measurements on four of the LnSbTe (Ln=La, Ce, Sm, Gd) compounds in order to investigate their exact electronic ground states. Metallic responses are commonly observed in all of the four compounds, despite their different transport behaviors. Furthermore, We observe some temperature-dependent excitations in the midinfrared region which are most likely to stem from CDW gaps. There is one such gap of about 452 meV in LaSbTe, one about 471 meV in CeSbTe, and two around 374 and 480 meV in GdSbTe, but none in SmSbTe, which is inconsistent with their highly similar electronic structures. Additionally, the presence of a Kondo hybridization gap is a bit too weak to be clearly revealed in our measured temperature range. Our results provide more detailed information on the LnSbTe family, which helps to understand the underlying physics of these systems and inspires more related explorations.

关键词： Charge density waves Kondo effect Topological materials Optical spectroscopy Reflectivity

来源：评论

学校读者我要写书评

暂无评论

Controlling and measuring a superposition of position and momentum

引用

Physical Review A 2023年第1期108卷 012215-012215页

作者： Takafumi Ono Nigam Samantarray John G. Rarity Quantum Engineering Technology Laboratories H. H. Wills Physics Laboratory and Department of Electrical & Electronic Engineering University of Bristol Bristol BS8 1FD United Kingdom Program in Advanced Materials Science Faculty of Engineering and Design Kagawa University 2217-20 Hayashi-cho Takamatsu Kagawa 761-0396 Japan JST PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan Department of Physics University of Strathclyde John Anderson Building 107 Rottenrow Glasgow G4 0NG United Kingdom

We present an observation of quantum interference between position and momentum with photons. We prepared a superposition of position and momentum states by using slits, lenses, and an interferometer. The precise control and measuring of propagation time of the photon results in a clear quantum interference of 85% visibility. The generated quantum state is then used to verify the violation of particle propagation inequality proposed by Hofmann [Phys. Rev. A 96, 020101(R) (2017)], resulting in 5.9% below the statistically predicted lower bound. We believe that this result is a major step towards further developments in quantum theory, such as fundamental modifications to the interpretation of quantum mechanics.

关键词： Quantum control Quantum information theory Quantum measurements Quantum metrology

来源：评论

学校读者我要写书评

暂无评论

DeePMD-kit v3: A Multiple-Backend Framework for Machine Learning Potentials

arXiv

引用

arXiv 2025年

作者： Zeng, Jinzhe Zhang, Duo Peng, Anyang Zhang, Xiangyu He, Sensen Wang, Yan Liu, Xinzijian Bi, Hangrui Li, Yifan Cai, Chun Zhang, Chengqian Du, Yiming Zhu, Jia-Xin Mo, Pinghui Huang, Zhengtao Zeng, Qiyu Shi, Shaochen Qin, Xuejian Yu, Zhaoxi Luo, Chenxing Ding, Ye Liu, Yun-Pei Shi, Ruosong Wang, Zhenyu Bore, Sigbjørn Løland Chang, Junhan Deng, Zhe Ding, Zhaohan Han, Siyuan Jiang, Wanrun Ke, Guolin Liu, Zhaoqing Lu, Denghui Muraoka, Koki Oliaei, Hananeh Singh, Anurag Kumar Que, Haohui Xu, Weihong Xu, Zhangmancang Zhuang, Yong-Bin Dai, Jiayu Giese, Timothy J. Jia, Weile Xu, Ben York, Darrin M. Zhang, Linfeng Wang, Han School of Artificial Intelligence and Data Science Unversity of Science and Technology of China Hefei China AI for Science Institute Beijing100080 China DP Technology Beijing100080 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China State Key Lab of Processors Institute of Computing Technology Chinese Academy of Sciences Beijing100871 China University of Chinese Academy of Sciences Beijing China Baidu Inc. Beijing China Department of Computer Science University of Toronto TorontoON Canada Department of Chemistry Princeton University PrincetonNJ08540 United States University of Chinese Academy of Sciences Beijing100871 China State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China College of Integrated Circuits Hunan University Changsha410082 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Smart Materials and Device Integration School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China College of Science National University of Defense Technology Changsha410073 China Hunan Key Laboratory of Extreme Matter and Applications National University of Defense Technology Changsha410073 China ByteDance Research Beijing100098 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education College of Chemistry Beijing Normal University Beijing100875 China Department of Geosciences Princeton University PrincetonNJ08544 United States Department of Applied Physics and Applied Mathematics Columbia University New YorkNY10027 United States IKKEM Fujian Xiamen361005 China Graduate

In recent years, machine learning potentials (MLPs) have become indispensable tools in physics, chemistry, and materials science, driving the development of software packages for molecular dynamics (MD) simulations and related applications. These packages, typically built on specific machine learning frameworks such as TensorFlow, PyTorch, or JAX, face integration challenges when advanced applications demand communication across different frameworks. The previous TensorFlow-based implementation of DeePMD-kit exemplified these limitations. In this work, we introduce DeePMD-kit version 3, a significant update featuring a multi-backend framework that supports TensorFlow, PyTorch, JAX, and PaddlePaddle backends, and demonstrate the versatility of this architecture through the integration of other MLPs packages and of Differentiable Molecular Force Field. This architecture allows seamless backend switching with minimal modifications, enabling users and developers to integrate DeePMD-kit with other packages using different machine learning frameworks. This innovation facilitates the development of more complex and interoperable workflows, paving the way for broader applications of MLPs in scientific research. Copyright © 2025, The Authors. All rights reserved.

关键词： Molecular dynamics

来源：评论

学校读者我要写书评

暂无评论

Design and analysis of mild steel mini truck body for increasing the payload capacity

Design and analysis of mild steel mini truck body for increa...

引用

International Conference on Newer trends and Innovations in Mechanical engineering, ICONTIME 2020

作者： Satish, S. Alexis, S. John Bhuvendran, Arun Shanmugam, Mohanraj Baskar, S. Shaisundaram, V.S. Department of Automobile Engineering Kumaraguru College of Technology Coimbatore India Department of Materials Engineering and Nanotechnology Politecnico di Milano Milano Italy Department of Automobile Engineering Vels Institute of Science Technology and Advanced Studies Chennai India

In India most of the small scale industries and traders would modify their vehicle body in order to maximize the load carrying capacity of the truck for economical reason. These alteration are done without proper design and analysis. In this work the vehicle body is designed to increase the pay load capacity of mini truck from 1.5 tons to 2 tons. The proposed model is analyzed for distributed load, line load and impact load due to cylindrical object. The impact analysis is done by assuming a set of cylinders weighing 1 tons dropped from 1 cm height. The vehicle body is modelled in CATIA and analyzed using ANSYS 16.2 FEA commercial software. The material chosen for analysis is mild steel. The strength of the body is assessed using deformation, stress and factor of safety value obtained from FEA analysis. The stress concentration is high at intersection point of body and chassis and also at top corner of the side channels and it is reduced by design modification. The final results shows that the proposed design is safe for the assumed. © 2020 Elsevier Ltd. All rights reserved.

关键词： Finite element method

来源：评论

学校读者我要写书评

暂无评论

Evidence for Two-Stage Hardening in an Al-Zn-Mg-Cu Alloy Processed by High-Pressure Torsion

SSRN

引用

SSRN 2022年

作者： dos Santos, Igor Cuzzuol Mazzer, Eric M. Figueiredo, Roberto B. Langdon, Terence G. Rodrigues Pereira, Pedro Henrique Graduate Program in Metallurgical Materials and Mining Engineering Universidade Federal de Minas Gerais MG Belo Horizonte31270-901 Brazil Department of Materials Science and Engineering Universidade Federal de São Carlos SP São Carlos13565-905 Brazil Department of Metallurgical and Materials Engineering Universidade Federal de Minas Gerais MG Belo Horizonte31270-901 Brazil Materials Research Group Department of Mechanical Engineering University of Southampton SouthamptonSO17 1BJ United Kingdom

Experiments were conducted to assess the effect of torsional straining on the microstructural evolution of an Al-5.7Zn-1.8Mg-2.1Cu alloy containing dispersed second phase particles prior to deformation. The results show that the material exhibits two distinct and consecutive hardening stages when processed through 1/8, 1, 5, 30, 50 and 100 turns in high-pressure torsion (HPT). There is an initial increase in the Vickers hardness from ~120 Hv in the unprocessed state to ~240 Hv after 1 turn. In this first stage, hardening occurs primarily through the accumulation and rearrangement of dislocations into fine cells/subgrains. A quasi-stationary condition is achieved with further straining where the microhardness remains nearly constant and the grain size is ~140 nm up to 30 revolutions. Thereafter, the microstructure consists of ultrafine and slightly elongated grains but the second phases are continuously fragmented. This fragmentation produces a new hardening stage and the development of a uniform array of highly elongated grains with an average size of ~93 nm after 100 HPT turns. It is shown that this two-stage hardening is consistent with conventional Hall-Petch strengthening and the development of the second stage is attributed to a reduction in grain boundary mobility due to the segregation of solutes. © 2022, The Authors. All rights reserved.

关键词： Aluminum alloys

来源：评论

学校读者我要写书评

暂无评论

Exploiting the stereoelectronic effects for selective tuning of band edge states of α-SnO: GW quasiparticle calculations

引用

Physical Review B 2022年第8期106卷 085201-085201页

作者： Yabei Wu Zhao Tang Greis J. Cruz Ya Yang Wenqing Zhang Wei Ren Peihong Zhang International Centre for Quantum and Molecular Structures Department of Physics Shanghai University 99 Shangda Road Shanghai 200444 China Department of Physics University at Buffalo State University of New York Buffalo New York 14260 USA Department of Materials Science and Engineering Shenzhen Institute for Quantum Science and Engineering and Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen Guangdong 518055 China Key Laboratory of Microelectronics and Energy of Henan Province Henan Joint International Research Laboratory of New Energy Storage Technology Xinyang Normal University Henan 464000 China

Tuning the electronic structure of materials, and thus their electronic, transport, and optical properties, is of fundamental importance for materials design and optimization. Although alloying is a well-established method for engineering the band gap of semiconductors, strain engineering has emerged as a promising approach to selective tuning of band-edge states. Using a combined density functional theory and GW approach, we show that the highly directional intralayer and interlayer couplings, together with the unusual stereoelectronic effects of the Sn 5s lone pair in α-SnO, may be exploited to tune, in addition to the band gap, the valence and conduction band-edge states selectively using in-plane and/or out-of-plane strains. Whereas the uniaxial strain along the lattice c direction primarily affects the position of the conduction band edge, the valence band edge is very sensitive to the biaxial ab strain. We also establish a strain electronic phase diagram of α-SnO, including the insulator–metal phase transition boundary. It is predicted that a compressive biaxial strain of about 3% or an isotropic pressure of 5 GPa can trigger an insulator–metal transition. The quasiparticle band gap can be widely tuned from 0 to more than 2.0 eV with moderate strains.

关键词： Band gap Electronic structure Strain Layered semiconductors Semiconductors GW method

来源：评论

学校读者我要写书评

暂无评论

Time-Domain Flexible Pulse Fiber Laser Generation and High-Power Evolution Based on Inter-Band Excitation of Lead Sulfide Nanoflakes

SSRN

引用

SSRN 2022年

作者： Guo, Kun Fan, Chao Yu, Qiang Wang, Jin Deng, Haiqin Wang, Tao Liu, Fangqi Ding, Xianguang Pan, Zhenghui Zhu, Sicong Yang, Jie Zhang, Qinglin Wu, Jian Zhou, Pu Jiang, Zongfu College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha410073 China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province School of Physics and Electronic Science Hunan University Changsha410082 China School of Materials Science and Engineering Tongji University Shanghai201804 China Nanjing University of Posts & Telecommunications Nanjing210023 China College of Science Key Laboratory for Ferrous Metallurgy Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Centre for Advanced 2D Materials Graphene Research Centre National University of Singapore 117576 Singapore Department of Materials Science and Engineering National University of Singapore 117574 Singapore Department of Electrical and Computer Engineering National University of Singapore 117583 Singapore

Ultrafast photonics has become an interdisciplinary topic of great significance owing to the spectacular development of compact and efficient ultrafast pulse generation. Saturable absorbers (SAs) are the kernel for ultrafast pulse generation. However, the conventional SAs performance is plateauing owing to the complex preparation process, the time-domain scope not comprehensive, and the relatively low laser output at mill watt level. Herein, high-quality comprehensive vertical Lead Sulfide (PbS) nanoflakes were synthesized by the physical vapor deposition (PVD), and a home-build handy dry-transfer system was used to simplify the fabrication process of PbS saturable absorbers device (PbS-SAs). Meanwhile, the normalization fabricated PbS-SAs was further introduced onto an all-fiber master oscillator power amplifier (MOPA) pulse laser system, and an erbium-doped fiber pulse laser based on PbS-SAs was proposed and demonstrated. The integrated system based on PbS-SAs achieved a time-domain flexible fiber pulse laser, high order harmonic mode-locked pulse, and a picosecond pulse (~ 287ps) with high average power of ~ 57.5 W and peak power of ~ 13.7 kW at the central wavelength of 1562 nm. This research not only provides a simple manufacturing process for high uniformity SAs devices but also greatly improves output power, which would attract interest in exploring the unique properties of nanocomposite SAs for photonic applications. © 2022, The Authors. All rights reserved.

关键词： Sulfur compounds

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：