Acta Metallurgica Slovaca最新文献_第7页

ENGINEERING PEDAGOGY COURSE MAPPING 工程教育学课程制图

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Acta Metallurgica Slovaca Pub Date : 2022-03-15 DOI: 10.36547/ams.28.1.1411

Alexander V. Perig, E. Gribkov, P. A. Gavrish, A. Zavdoveev, D. Mikhieienko, O. Subotin, Oleksii V. Razzhyvin, Artem F. Zaliatov, Tetiana K. Kasian, Mykyta O. Zhuravlov, Mykyta S. Davydenko, Yevgeny Lodatko, S. Podlesny, Liudmyla V. Vasylieva

{"title":"ENGINEERING PEDAGOGY COURSE MAPPING","authors":"Alexander V. Perig, E. Gribkov, P. A. Gavrish, A. Zavdoveev, D. Mikhieienko, O. Subotin, Oleksii V. Razzhyvin, Artem F. Zaliatov, Tetiana K. Kasian, Mykyta O. Zhuravlov, Mykyta S. Davydenko, Yevgeny Lodatko, S. Podlesny, Liudmyla V. Vasylieva","doi":"10.36547/ams.28.1.1411","DOIUrl":"https://doi.org/10.36547/ams.28.1.1411","url":null,"abstract":"Graduate students of technical universities have practical difficulties with learning and successful instructional implementation of the fundamentals of engineering didactics. The paper is focused on the formulation of a thought-provoking curriculum with computational assignments for the course of “Technical University Pedagogic and Methodological Foundations of Engineering Education” (TUPMFEE) for graduate and Ph.D. students. The paper uses computational modelling of behavioral processes in socio-educational systems. The TUPMFEE-curriculum teaches future engineers to apply computational techniques to modeling of socio-technical phenomena. The author-formulated and a computer modeling-supported metaphor for the psycho-educational effects of high social pressure impact on student learning dynamics was allegorically visualized using mechanical rolling stress distribution for the nonlinear social process of student knowledge acquisition during instructor-enhanced education with description of some successive forgetting of the previously acquired instructional material upon the studied course completion. The author-proposed TUPMFEE-course successfully triggers graduate students’ interest in both social, mechanical and computer sciences.","PeriodicalId":44511,"journal":{"name":"Acta Metallurgica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46616366","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: 2

INVESTIGATION OF THE EFFECT OF NITROCARBURIZING TREATMENT ON TRIBOLOGICAL PROPERTIES OF AISI 1045 MEDIUM CARBON STEEL 氮碳共渗处理对aisi 1045中碳钢摩擦学性能影响的研究

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Acta Metallurgica Slovaca Pub Date : 2022-03-15 DOI: 10.36547/ams.28.1.1127

Elhadj Ghelloudj

引用次数: 0

METALLURGICAL AND MECHANICAL INVESTIGATION OF TIG ARC WELDMENTS FOR API 32″ GAS PIPE API 32″燃气管道tig弧焊件的冶金和力学研究

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Acta Metallurgica Slovaca Pub Date : 2022-03-15 DOI: 10.36547/ams.28.1.1324

T. El-Bitar, Maha El-Meligy, M. Gamil

引用次数: 0

THE EFFECT OF ULTRA-FINE ALLOYING ELEMENTS ON THE PHASE COMPOSITION, MICROSTRUCTURE, HIGH-TEMPERATURE STRENGTH AND FRACTURE TOUGHNESS OF Ti–Si–X AND Ti–Cr–X COMPOSITES 超细合金元素对Ti–Si–X和Ti–Cr–X复合材料相组成、微观结构、高温强度和断裂韧性的影响

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Acta Metallurgica Slovaca Pub Date : 2022-03-15 DOI: 10.36547/ams.28.1.1350

V. Kulyk, B. Vasyliv, Z. Duriagina, P. Lyutyy, V. Vavrukh, T. Kovbasiuk, V. Vira, M. Holovchuk, T. Loskutova

{"title":"THE EFFECT OF ULTRA-FINE ALLOYING ELEMENTS ON THE PHASE COMPOSITION, MICROSTRUCTURE, HIGH-TEMPERATURE STRENGTH AND FRACTURE TOUGHNESS OF Ti–Si–X AND Ti–Cr–X COMPOSITES","authors":"V. Kulyk, B. Vasyliv, Z. Duriagina, P. Lyutyy, V. Vavrukh, T. Kovbasiuk, V. Vira, M. Holovchuk, T. Loskutova","doi":"10.36547/ams.28.1.1350","DOIUrl":"https://doi.org/10.36547/ams.28.1.1350","url":null,"abstract":"Advanced Ti-based composites are promising for applications in components of modern aircraft and rocket engines as well as other power equipment owing to their high strength-to-weight ratio and fracture toughness in a temperature range of 20 °C to 650 °C. However, there is a need to increase their operating temperature range up to 700−800 °C. In this work, mechanical behavior of Ti–Si–X composites (X=Al and/or Zr, Sn, C) has been studied. For comparison, mechanical behavior of Ti–Cr–X composite (X=Al and/or C) has been studied. As-cast and thermo-mechanically deformed series of beam specimens were examined. Strength tests of specimens were performed under three-point bending in a temperature range of 20 °C to 1000 °C. Single-edge notch beam (SENB) tests under three-point bending of specimen series were carried out in a temperature range of 20 °C to 900 °C for estimating fracture toughness of materials. Based on the constructed dependences of fracture toughness and strength on testing temperature for the specimen series as well as the microstructure and failure micromechanism analyses, the role of ultra-fine alloying elements in achieving good high-temperature strength and fracture toughness of the studied composites was substantiated.","PeriodicalId":44511,"journal":{"name":"Acta Metallurgica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44789766","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

The Improving of B2 Aluminium Composite Panel Core Material with Eloxal Sludge by Using Recycling Process 利用循环工艺改进乙二醛污泥对B2铝塑复合板芯材的性能

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Acta Metallurgica Slovaca Pub Date : 2022-03-15 DOI: 10.36547/ams.28.1.1128

Merve Özcan, B. Karaca, Y. Demirci, Bilge Tunca, L. C. Kumruoglu

引用次数: 0

INCREASING HARDNESS AND CORROSION RESISTANCE OF COMMERCIALLY PURE TITANIUM BY USING PLASMA NITROCARBURIZING PROCESS 采用等离子体氮碳共渗工艺提高商品纯钛的硬度和耐蚀性

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Acta Metallurgica Slovaca Pub Date : 2022-03-15 DOI: 10.36547/ams.28.1.1266

A. Darmawan, P. I. Purboputro, B. Sugito, B. W. Febriantoko, A. Yulianto, S. Suprapto, T. Sujitno, J. Purbolaksono

引用次数: 1

PHYSICO-MECHANICAL PROPERTIES ANND MICROSTRUCTURE RESPONSES OF HYBRID REINFORCED Al6063 COMPOSITES TO PKSA/SiC INCLUSION 混杂增强Al6063复合材料对PKSA/SiC夹杂物的物理力学性能和微观结构响应

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Acta Metallurgica Slovaca Pub Date : 2022-03-15 DOI: 10.36547/ams.28.1.1340

P. Ikubanni, M. Oki, A. A. Adeleke, P. Omoniyi, E. Ajisegiri, E. Akinlabi

{"title":"PHYSICO-MECHANICAL PROPERTIES ANND MICROSTRUCTURE RESPONSES OF HYBRID REINFORCED Al6063 COMPOSITES TO PKSA/SiC INCLUSION","authors":"P. Ikubanni, M. Oki, A. A. Adeleke, P. Omoniyi, E. Ajisegiri, E. Akinlabi","doi":"10.36547/ams.28.1.1340","DOIUrl":"https://doi.org/10.36547/ams.28.1.1340","url":null,"abstract":"The study examined the microstructure and mechanical properties of Al-Mg-Si alloy reinforced with palm kernel shell ash (PKSA) and silicon carbide (SiC). The alloy matrix was reinforced with SiC (2 - 8 wt.%) and PKSA (2 wt.%). The double stir-casting method was used to prepare the hybrid composite. The mechanical properties of the produced samples were evaluated based on ASTM standards. Identification of phases present in the composite was done using a PANalytical Empyrean diffractometer, while the microstructural characterization was examined using a scanning electron machine with electron dispersive spectrometer attachment. The density values increase as the SiC contents in the composites increase. As the reinforcement particulates increase, the mechanical properties of the reinforced composite improved with hardness value (73 – 85.5 BHN); yield strength (81 – 102 MPa); and ultimate tensile strength (123 – 133 MPa) compared with the matrix alloy of 73 BHN, 79 MPa, and 116 MPa, respectively. However, the percentage elongation and the fracture toughness of the reinforced samples reduced to 34.2 and 40.11%, respectively. The phases identified in the composites were Al, SiO2, Fe3Si, MgO, and SiC. The synthesized hybrid composites would be applicable as building materials such as aluminium frames and roofing sheets.","PeriodicalId":44511,"journal":{"name":"Acta Metallurgica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45635056","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: 7

Preparation of Transparent MgAl2O4 Spinel by Pulsed Electric Current Sintering Using Two-step Heating Method 两步加热脉冲电流烧结法制备透明MgAl2O4尖晶石

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Acta Metallurgica Slovaca Pub Date : 2021-12-07 DOI: 10.36547/ams.27.4.1212

Y. Nguyen, H. M. Le, Tu Anh Dao, H. N. Tran, T. Nguyen, Thang Hong Le, K. Dang

引用次数: 1

PHYSICO-TRIBOLOGICAL ANND WEAR MECHANISM CHARACTERISTICS OF HYBRID REINFFORCED Al6063 MATRIX COMPOSITES 混杂增强Al6063基复合材料的物理摩擦学退火磨损机制特征

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Acta Metallurgica Slovaca Pub Date : 2021-12-07 DOI: 10.36547/ams.27.4.1084

P. Ikubanni, M. Oki, A. A. Adeleke, O. Adesina, P. Omoniyi

{"title":"PHYSICO-TRIBOLOGICAL ANND WEAR MECHANISM CHARACTERISTICS OF HYBRID REINFFORCED Al6063 MATRIX COMPOSITES","authors":"P. Ikubanni, M. Oki, A. A. Adeleke, O. Adesina, P. Omoniyi","doi":"10.36547/ams.27.4.1084","DOIUrl":"https://doi.org/10.36547/ams.27.4.1084","url":null,"abstract":"The development of engineering materials is continuously attracting attention from scientists and engineers for numerous engineering applications. The physical properties and wear mechanism of aluminium (Al 6063) matrix reinforced with silicon carbide (SiC) and palm kernel shell ash (PKSA) particulates at different weight ratios ranging from 0 to 10 wt.% with 2 wt.% intervals were investigated. The liquid route of double stir casting was employed in synthesizing the composites. The wear experiment was conducted using the Taber-type wear abrasion machine. The worn surfaces were examined using scanning electron microscopy (SEM) with energy-dispersive x-ray spectroscopy (EDS), while the intermetallic phases were examined using the x-ray diffractometer (XRD). From the result, the increase in PKSA and SiC lowered and improved the density of the composites, respectively. The percentage porosity values (2 - 2.4%) obtained in this study were found to be within the acceptable limit of less than 4% for metal matrix composites castings. The mass loss and wear index increased owing to the rotating speed and applied load increase, resulting from the occurrence of mechanical mixing between the contacting surface of the sample disk and the machined disc. Adhesive and abrasive wear mechanisms were the major mechanisms observed in this study. ","PeriodicalId":44511,"journal":{"name":"Acta Metallurgica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48674095","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

Effect of plasma nitriding of austenitic stainless steel produced by direct metal laser sintering 金属激光直接烧结奥氏体不锈钢等离子体氮化的影响

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Acta Metallurgica Slovaca Pub Date : 2021-12-07 DOI: 10.36547/ams.27.4.1172

D. Kovács, D. Kemény

引用次数: 2