Advances in Science and Technology Research Journal最新文献_第3页

Laboratory Tests of Rolling Resistance of Different Tread Profiles for the Wheel of Martian Roverr 火星漫游车车轮不同胎面滚动阻力的实验室测试

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186931

Michał Gorzym, D. Markuszewski

{"title":"Laboratory Tests of Rolling Resistance of Different Tread Profiles for the Wheel of Martian Roverr","authors":"Michał Gorzym, D. Markuszewski","doi":"10.12913/22998624/186931","DOIUrl":"https://doi.org/10.12913/22998624/186931","url":null,"abstract":"The aim of the research was to design and build a research stand that can be used to compare different types of tire tread profiles of the Mars rover (made using 3D printing) and to select the one that meets the criterion of the lowest power consumption of the drive motor, which corresponds to the minimum rolling resistance in paved area. As part of the task, a research stand was designed and built, consisting of two drive units of the tested drive system: one as a driving unit, the other as a driven unit, generating resistance when rolling one tire after another. During the tests, the following parameters were measured: the amplitude of the supply current, the rotational speed, information about which was obtained from the motor controller and the encoder located in the BLDC (brushless direct-current) motor, and their variability over time. Additionally, the amplitude of the force press - ing the wheel against the supporting surface, which generated tire deflection, was also measured. A relationship was demonstrated between the type of tire tread used, the force pressing the tires against the supporting surface and the rolling resistance forces of the Mars rover tires. The tire with the lowest rolling resistance under given operating conditions was selected.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"32 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233938","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

Simulation and Experimental Study of the Termo-Mechanical Effect of the Milling Process of 7075 Aluminium Alloy 7075 铝合金铣削过程的终端机械效应模拟与实验研究

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/185680

W. Habrat, Joanna Lisowicz, Jarosław Tymczyszyn, Anna Skroban

引用次数: 0

Adsorption Equilibrium Studies on the Example of Nitrate Removal Onto Char Produced from Waste Tires 以废轮胎制炭去除硝酸盐为例的吸附平衡研究

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186760

Agata Skwarczynska-Wojsa, E. Szatyłowicz, I. Skoczko

{"title":"Adsorption Equilibrium Studies on the Example of Nitrate Removal Onto Char Produced from Waste Tires","authors":"Agata Skwarczynska-Wojsa, E. Szatyłowicz, I. Skoczko","doi":"10.12913/22998624/186760","DOIUrl":"https://doi.org/10.12913/22998624/186760","url":null,"abstract":"There have been investigated potential evaluation of equilibrium adsorption isotherm for the removal of nitrates from water solutions using two types of char (CH-1 and CH-2) produced in commercial-scale pyrolysis based on recycled waste rubber tires. Liquid phase adsorption studies were performed under batch conditions and maximum adsorption capacity was determined. Equilibrium data were mathematically modelled using two-parameters Lang-muir, Freundlich, three-parameters Redlich-Peterson, Toth, Dubinin-Radushkevich, Radke-Praushnitz, combined Langmuir-Freundlich and four-parameters Fritz-Schlunder, Marczewski-Jaroniec, Bi-Langmuir adsorption models. Obtained results revealed the potential use of the studied char adsorbents for nitrates removal from aqueous media (the maximum adsorption capacity at equilibrium 10.07 mg/g, have been achieved for CH-1 char). The Langmuir-Freundlich isotherm had the best fit for the adsorption experimental data over the whole concentration range. The highest percentage of NO 3 removal efficiency onto CH-1 char achieved in NO 3 initial concentration range from 26.44 to 66.55mg/L reaching values in the range of from 80.74 to 78.7%.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"5 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141229006","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-Temperature Two-Stage Subcritical Heat Pump Running on Environmentally Friendly Refrigerants 使用环保制冷剂的高温双级亚临界热泵

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/187103

Paweł Obstawski, Krzysztof Tomczuk

{"title":"High-Temperature Two-Stage Subcritical Heat Pump Running on Environmentally Friendly Refrigerants","authors":"Paweł Obstawski, Krzysztof Tomczuk","doi":"10.12913/22998624/187103","DOIUrl":"https://doi.org/10.12913/22998624/187103","url":null,"abstract":"The paper presents the design of a two-stage subcritical compressor heat pump operating in an air-to-water system and running on environmentally friendly refrigerants. The pump is dedicated to buildings where there is a high-temperature central heating system and wall-mounted radiators are used as heat receivers. The first stage of the unit was supplied with R290 refrigerant and the second stage with R1234 ze(E) refrigerant. The nominal heating capacity of the unit is 10 kW for a lower source temperature in the range -20÷10 °C. The unit›s refrigeration system was designed and simulation tests were carried out to determine the unit›s operating parameters for the lower source temperature in the range -20÷10 °C, the condensation temperature of the stage I refrigerant for values: 20 °C, 25 °C, 30 °C and the condensation temperature of the stage II refrigerant in the range 30÷60 °C. The value of the coefficient of performance (COP) was determined in relation to the heating capacity generated in stages I and II to the electricity consumed, which value, depending on the operating parameters, ranges from 2.55 to 5.6. The value of the COP related to the heating capacity received from the stage II condenser to the total capacity consumed by the stage I and II compressor, depending on the operating parameters, ranges from 1.5 to 2.9. It was found that by using a stepless adjustment of the volumetric efficiency of the stage I and II compressor, it is possible to match the heating capacity of stage I to the cooling capacity of stage II and thus increase the COP value by 50%.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"30 50","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233111","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

Hot Ductility of High-Mn Steel with Niobium and Titanium 含铌和钛的高锰钢的热延展性

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/185497

M. Opiela, G. Fojt-Dymara

{"title":"Hot Ductility of High-Mn Steel with Niobium and Titanium","authors":"M. Opiela, G. Fojt-Dymara","doi":"10.12913/22998624/185497","DOIUrl":"https://doi.org/10.12913/22998624/185497","url":null,"abstract":"The work presents the results of research on the effect of deformation parameters on hot ductility of high-Mn aus - tenitic steel with niobium and titanium. The investigations were carried out on steel with 0.05% C, 24% Mn, 3.5% Si, 1.5% Al, 0.030% Nb and 0.075% Ti. Hot static tensile test was performed using Gleeble 3800 thermomechanical simulator. Samples were deformed in a temperature range from 1050 °C to 1200 °C with a strain rate of 3·10 -3 s -1 . The reduction in area (RA), determined in the static tensile test, was the basis for determining the hot ductility of the examined steel. Reduction in area of examined steel decreases from 88% at the temperature of 1050 °C to 59% at 1200 °C. High hot ductility of the investigated steel is the result of the synergy of chemical composition optimization, properly conducted modification of non-metallic inclusions and formed fine-grained microstructure of dynamically recrystallized austenite. In addition to hot ductility, parameters characterizing susceptibility of studied steel to high temperature cracking were also defined, namely: ductility recovery temperature (DRT), nil ductility temperature (NDT) and nil strength temperature (NST) were determined. The values of these temperatures are 1240 °C, 1250 °C and 1270 °C, respectively. This means that the temperature of the beginning of plastic deformation of ingots of this steel may be equal even slightly above 1200 °C. In addition, the high-temperature brittleness range (HTBR) was determined, which is equal 30 °C.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"28 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233560","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

Effect of Shot Peening Parameters on Surface Properties and Corrosion Resistance of 316L Stainless Steel 喷丸强化参数对 316L 不锈钢表面特性和耐腐蚀性的影响

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186513

M. Walczak, Jonas Matijošius, Doğuş Özkan, K. Pasierbiewicz

{"title":"Effect of Shot Peening Parameters on Surface Properties and Corrosion Resistance of 316L Stainless Steel","authors":"M. Walczak, Jonas Matijošius, Doğuş Özkan, K. Pasierbiewicz","doi":"10.12913/22998624/186513","DOIUrl":"https://doi.org/10.12913/22998624/186513","url":null,"abstract":"The present work deals with the enhancement of the surface characteristics of stainless steel 316L as a result of shot peening treatment using ceramic balls. In accordance with our own research and information available in literature, as a result of shot peening process, the shot balls can penetrate to the surface layer (permanently depositing) and modify the mechanical performance and the corrosion resistance in the products being treated in this way. Shot peening leads to a significant change to the surface hardness and topography, and consequently, to the change in corrosion behaviour dependent on the choice of processing parameters. Therefore, in this paper, steel samples were treated using two variable parameters of peening pressure (0.3 and 0.4 MPa) and peening time (30 and 60s). In the research, the reference surface were the samples subjected to mechanical polishing. The surface morphology of the samples was investigated by scanning electron microscopy (SEM). The potentiodynamic polarization tests were performed with 1 mV/s scan rate in 0.9% NalCl solution. The improved corrosion resistance (lowest current density I corr = 0.35 µA/cm 2 and highest corrosion potential E corr = -0.164 V) was obtained for specimens with longer time (60 s) and higher pressure of shot peening treatment (0.4 MPa). Greater changes in surface roughness were observed with an increase in peening pressure than with an increase in the processing time. The treatment of the surface with ceramic shots results in an increase in the hardness of the treated surface by more than 110% (for sample 316L/0.4/60) compared to the reference surface. Moreover, an increase in average hardness values was recorded for all surfaces after shot peening (by more than 42% relative to reference samples).","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"5 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233763","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

Performance Evaluation of a Production Control Architectures for Flexible Manufacturing System 柔性制造系统生产控制架构的性能评估

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186222

Dhuha Kadhim Ismayir, L. Dawood, M. Al-Khafaji

引用次数: 0

Surface Modification of the Ti-35Nb-7Zr-5Ta Bio Alloy by the PM-EDM Route 通过 PM-EDM 工艺对 Ti-35Nb-7Zr-5Ta 生物合金进行表面改性

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186159

A. R. Hayyawi, H. Al-Ethari, Ali Hubi Haleem

{"title":"Surface Modification of the Ti-35Nb-7Zr-5Ta Bio Alloy by the PM-EDM Route","authors":"A. R. Hayyawi, H. Al-Ethari, Ali Hubi Haleem","doi":"10.12913/22998624/186159","DOIUrl":"https://doi.org/10.12913/22998624/186159","url":null,"abstract":"One of the most attractive β-Ti alloys is Ti–35Nb–7Zr–5Ta wt% (TNZT) alloy, which has one of the lowest Young’s moduli among the β-Ti family (about 55 GPa) and contains no cytotoxic elements. On the other hand, the β -type Ti alloys are susceptible to bacterial infection because they lack an antibacterial function and can become contaminated quickly after implantation, making surface modification a keyway to improve the antibacterial properties of these alloys. A recently created technique called powder mixed-EDM can simultaneously improve machining, mechanical, and biological properties. In this research, silver was added to the dielectric fluid during PM-EDM of Ti-35Nb-7Zr-5Ta wt% alloy prepared by powder metallurgy route. The surface composition, Brinell hardness, corrosion resistance, ion release, and antibacterial properties were evaluated for the TNZT alloy before and after surface modification. The results show better hardness and corrosion resistance as well as lower ion re - lease for the PM-EDMed specimen due to the presence of Ag, oxides, and carbides such as NbC, TiC, TiO 2 , ZrO 2, and Nb 2 O 5 that is deposited and embedded as a hard phase in the recast layer of the machined surface. Also, the antibacterial property of the PM-EDMed specimen is effectively improved as silver is an antibiotic with a wide range, so it has favorable antibacterial properties for Gram-negative and Gram-positive bacteria.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"9 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141230826","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

Experimental Energy Recovery from a Backpack Using Various Harvester Concepts 利用各种收割机概念进行背包能量回收实验

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/185848

Krzysztof Kecik

引用次数: 0

Effect of Surface Hydrophobization on the Durability of Concrete with Cement Kiln Dust 表面疏水化对水泥窑粉尘混凝土耐久性的影响

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186212

Małgorzata Grzegorczyk-Frańczak, W. Andrzejuk, Robert Hunek, Grzegorz Łagód

{"title":"Effect of Surface Hydrophobization on the Durability of Concrete with Cement Kiln Dust","authors":"Małgorzata Grzegorczyk-Frańczak, W. Andrzejuk, Robert Hunek, Grzegorz Łagód","doi":"10.12913/22998624/186212","DOIUrl":"https://doi.org/10.12913/22998624/186212","url":null,"abstract":"The examinations of concrete involved partial substitution of cement with cement kiln dust (CKD) 0, 5, 10, 20 and 30%. The water/cement (w/c) ratio amounted to 0.36. The obtained findings pertaining to open porosity, density, and volumetric density were found to correlate with the capillary action and absorptivity of the analyzed types of concrete. With the maximum addition of CKD, i.e. 30%, open porosity decreased by 35%. In turn, CKD added in the amount of 5% resulted in a slightly reduced addition compressive strength, amounting to 1.3% and 2.1% fol - lowing 28 days and 56 days of concrete curing, respectively. After 28 days, the differences in strength were greater when the additive was supplied in higher amounts, i.e. 10%, 20%, and 30%, resulting in 6.5%, 13.4%, and 22.9% decrease, respectively, in spite of strength improvement. In terms of flexural and splitting tensile strengths, compa - rable relations were noted. As far as the frost resistance test results are concerned, the mass losses in all examined concretes were not significant, reaching up to 0.5%. The strength reduction in the case of the first three series of concretes was below 3%. When the CKD addition was increased to 20% and 30%, the value of the dynamic modu - lus of elasticity E c,s decreased to a greater degree, by 8.0% and 14.7%, respectively. The hydrophobization effect is best seen in CKD-free concrete. After the impregnation, the loss of mass following the frost test of the samples is reduced by half. With a higher CKD content, the hydrophobization effectiveness is insignificant. The most favour - able results were observed for hydrophobization with the oligomer-based preparation A1.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"20 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233976","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