IOP Conference Series: Materials Science and Engineering最新文献_第9页

An update on the Colossus mK platform at Fermilab 费米实验室 Colossus mK 平台的最新进展

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1302/1/012030

Matthew I Hollister, Ram C Dhuley, Christopher James, Grzegorz L Tatkowski

引用次数: 0

Experimental study of two-phase cryogenic cooling of aluminum stator conductors using a single slot test configuration 利用单槽测试配置对铝定子导体进行两相低温冷却的实验研究

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1301/1/012161

Y Guo, M Majoros, C G Cantemir, J Kwon, C Kovacs, M Rindfleisch, M Tomsic, D Doll, M Sumption, E W Collings

{"title":"Experimental study of two-phase cryogenic cooling of aluminum stator conductors using a single slot test configuration","authors":"Y Guo, M Majoros, C G Cantemir, J Kwon, C Kovacs, M Rindfleisch, M Tomsic, D Doll, M Sumption, E W Collings","doi":"10.1088/1757-899x/1301/1/012161","DOIUrl":"https://doi.org/10.1088/1757-899x/1301/1/012161","url":null,"abstract":"An important goal to enable widespread adoption of electric aircraft propulsion is to develop higher power density motors and generators which are at the same time highly efficient. One way to do this is to use conductors that can carry higher currents and/or generate lower losses. One approach to this is the use of superconducting windings. However, here we focus on very low resistance normal state conductors operating at cryogenic temperatures. The resistivity of both aluminum and copper drops quickly with decreasing temperature, such that the resistivity of Cu drops by about a factor of 7, and that of aluminum by 10, by the time we reach 77 K (LN2). OSU and Hyper Tech have teamed to develop a motor with liquid cryogen cooled aluminum windings (LN2 or LNG cooled). It includes a multi-slot stator with direct cryogen cooling. Here we present the results of a simple “single slot” test which explores the temperature rise of a pair of conductors in a slot directly cooled by LN2. These two aluminum bars are made of 1100 commercial purity Al alloy were placed in parallel with a 1.6 mm gap, which behaved as 120 mm long cryogenic flow channel. Current densities up to 75 A/mm<sup>2</sup> were explored, with LN2 flow rates ranging from 1.9 g/s to 6.4 g/s. Thermocouples and voltage taps were used to capture temperature and voltage data during the experiment. As a result, we found stable cooling and operation at these flow rates and current densities, and we characterized the temperature gradient which developed along the conductor bars.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567583","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

High Accuracy Resisitivity and Temperature Coefficient Measurements of Invar Wire from 5K to 300K 高精度测量 5K 至 300K 英钢线的电阻率和温度系数

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1301/1/012170

B Hamilton, J L Adams, J G Brisson

引用次数: 0

Development of an apparatus and process for precision measurements of cryogenic thermal contraction of materials 开发用于精确测量材料低温热收缩的仪器和工艺

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1302/1/012031

James Tuttle, Amir Jahromi, Edgar Canavan, Jacob Nellis, Justin Scheidler

引用次数: 0

Design of GRETA Cooling Systems GRETA 冷却系统的设计

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1301/1/012101

L Wang, E Buice, H Crawford, J Doyle, P Fallon, A Hodgkinson, T Loew, M Regis, S Zimmermann

{"title":"Design of GRETA Cooling Systems","authors":"L Wang, E Buice, H Crawford, J Doyle, P Fallon, A Hodgkinson, T Loew, M Regis, S Zimmermann","doi":"10.1088/1757-899x/1301/1/012101","DOIUrl":"https://doi.org/10.1088/1757-899x/1301/1/012101","url":null,"abstract":"The Gamma-Ray Energy Tracking Array (GRETA) is a full 4π gamma-ray tracking detector capable of reconstructing the energy and three-dimensional position of gamma-ray interactions within a compact sphere of high-purity germanium crystals. The GRETA Detector Array Sphere will have the capacity to accommodate a total of 30 Germanium Quad Detector Modules (QDM). The 30 QDMs are to be cooled and maintained below 100 K using liquid nitrogen (LN) at all times while the array is in normal operation, and will require regular filling of a LN Dewar on each module. The Dewar is designed to allow the Quad Module to be operated in any orientation with a LN holding time of no less than 12 hours when the detector module is fully powered. An automated LN cooling and refilling system is required to supply LN to the 30 QDMs and ensure them maintained below 100 K. Each of the GRETA QDMs houses a total of 148 pre-amplifier units within the module, and with the high power consumption of each pre-amplifier, active cooling of the pre-amplifier compartment is required. Additionally, each Quad Module will have 4 digitizer modules attached to it, which generate heat and require cooling as well. A closed-loop liquid (Glycol) cooling system will provide the required temperature stability and dissipate power generated heat for electronics. This paper presents design of the GRETA LN cooling system for detectors and the closed-loop liquid cooling system for electronics including technical requirements, design schemes, key components, operation modes, and so on.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567591","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

Development of a novel forming tool for the production of high-strength aluminum components with tailored properties 开发用于生产具有特定性能的高强度铝部件的新型成型工具

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1307/1/012020

N Rigas, M Merklein

{"title":"Development of a novel forming tool for the production of high-strength aluminum components with tailored properties","authors":"N Rigas, M Merklein","doi":"10.1088/1757-899x/1307/1/012020","DOIUrl":"https://doi.org/10.1088/1757-899x/1307/1/012020","url":null,"abstract":"Because of growing environmental and technical requirements, the efficient manufacturing of components with tailored properties using recyclable materials is mandatory. The combination of high-strength aluminum alloys and thermal-assisted forming operations is an innovative method for the production of components with varying mechanical properties. By locally adjusting the cooling rates during a thermo-mechanical forming operation, it is possible to modify the microstructure and precipitation conditions. A subsequent aging operation causes different microstructural and mechanical characteristics. This allows both deep-drawing and adjustment of the component properties in one single step. For this reason, this contribution focuses on the production of components with tailored properties. With the aid of a non-contact measuring system, previous investigations have proved that mechanical material properties can be adapted during a forming process by adjusting the cooling rates. In this contribution, this knowledge is transferred to a novel temperature-controlled rectangular cup tool. A variation of the local tool temperature and holding duration in the tool will be carried out. Then, the mechanical and microstructural properties of the manufactured components will be characterized through hardness and DSC investigations. In addition, the influence of different tool temperatures on the component temperature, the sheet thickness distribution and process forces will be investigated. As a result, it has been demonstrated that mechanical, process-related and geometric advantages can be achieved by using locally temperature-controlled forming tools.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141523504","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

Feasibility of the tower crane jib made of composite material 复合材料塔式起重机臂的可行性

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1306/1/012010

L Solazzi

{"title":"Feasibility of the tower crane jib made of composite material","authors":"L Solazzi","doi":"10.1088/1757-899x/1306/1/012010","DOIUrl":"https://doi.org/10.1088/1757-899x/1306/1/012010","url":null,"abstract":"The main purpose of this research is to design a jib of a tower crane using composite material and to compare the effects/performance on the whole machine due to this lightweight process. The research starts by sizing the jib with steel material. Many different load conditions were involved and different criteria were assumed; those are: stress safety factor, stiffness, dynamic performance (modal) and buckling phenomenon which is the most important parameter. Then other non-standard load conditions were applied to the tower crane: moving load and jib (rotation and elevating) and adopting wind variable in time. The results of these load conditions were assumed to design a new jib made of pultruded composite material. The next step involves the design of additional elements of the crane: ropes, counter boom, counterweight, electric motor, etc. The last step concerns the economic feasibility of the new solution. The results show that the weight of the jib made by composite material is about 25% of the one made by steel and the economic payout for making the composite arm can be equalized in about a year and a half of machine operation, making the proposed solution very worthwhile.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194038","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

Impact of sand feed rate on the damage of railway wheel steels 给砂率对铁路车轮钢损伤的影响

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1306/1/012036

N Zani, K Shu, L Ghidini, C Petrogalli, A Mazzù

引用次数: 0

Approaching the re-design of reusable packaging from an environmental perspective: a case study in the railway sector 从环保角度重新设计可重复使用的包装：铁路部门的案例研究

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1306/1/012043

L. Berzi, M Cocci, R. Barbieri, M. Pierini, M. Delogu

{"title":"Approaching the re-design of reusable packaging from an environmental perspective: a case study in the railway sector","authors":"L. Berzi, M Cocci, R. Barbieri, M. Pierini, M. Delogu","doi":"10.1088/1757-899x/1306/1/012043","DOIUrl":"https://doi.org/10.1088/1757-899x/1306/1/012043","url":null,"abstract":"The production of railway vehicles determines the handling of a large amount of materials which are transferred from suppliers to production site using industrial packaging. The activity here described is part of the MORIMB project, which dealt with the reduction of waste related to railway sector; wood, plastic, cardboard and metal fasteners are the typical materials which are adopted for such packaging.The study is motivated from the evidence that, due to the peculiarities of the transported components, most of the packaging units were different from standardized formats therefore they were frequently used for a single transport and subsequently scrapped. An applicative methodology for the analysis, redesign, and evaluation of environmental and economic impacts was defined, with particular attention to packaging reusability. An adaptation of the DMAIC approach was used to analyze the various components and find solutions reusability and performance improvement, especially in terms of volume efficiency and component protection. Depending on the item to be transported, specific crates have been designed and structurally verified according to existing technical regulation, and their sustainability has been analyzed considering environmental and economic impact during production, transport and storage phase; appropriate scenarios regarding distance travelled and volume occupancy were defined. The case study presented in detail in this work concerns the concept of special crates for the transport of passenger seats – a key component for train production - for which an increase in packaging density and a reduction of transportation costs was achieved. Other case studies were also considered.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193909","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

Optimizing Reverse-Engineered Finite Element Models for Accurate Predictions of Experimental Measurements 优化逆向工程有限元模型，准确预测实验测量结果

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-05-01 DOI: 10.1088/1757-899x/1307/1/012040

A R Chezan, T Dhawale, E H Atzema, A Barlo, O Aeddula, J Pilthammar, M Sigvant, N A J Langerak

引用次数: 0