Materiali in tehnologije最新文献_第2页

THERMODYNAMIC PROPERTIES OF CaO-SiO2-MgO-Al2O3-B2O3 SLAG SYSTEMS AT 1773 K 1773 K 下 CaO-SiO2-MgO-Al2O3-B2O3 SLAG 系统的热力学性质

IF 0.5 4区材料科学

Materiali in tehnologije Pub Date : 2023-12-11 DOI: 10.17222/mit.2023.897

Xianmeng Wang, Yongchun Guo, Mengyao Li, Yanqiang Bu

引用次数: 0

MODELING OF THE TOOL LIFE FUNCTION OF A HOB MILLING TOOL USING GENETIC PROGRAMMING 利用遗传编程建立滚刀铣刀寿命函数模型

IF 0.5 4区材料科学

Materiali in tehnologije Pub Date : 2023-12-11 DOI: 10.17222/mit.2023.954

S. Sovilj-Nikić, I. Sovilj-Nikić, B. Sovilj

引用次数: 0

EFFECT OF ELECTROCHEMICAL PROCESS PARAMETERS ON THE HASTELLOY C-276 ALLOY FOR MACHINING SPEED AND SURFACE-CORROSION FACTOR 电化学工艺参数对哈氏合金 C-276 加工速度和表面腐蚀因子的影响

IF 0.5 4区材料科学

Materiali in tehnologije Pub Date : 2023-12-11 DOI: 10.17222/mit.2023.981

P. Venugopal, T. G. Arul, V. Selvam, K. Saranya

引用次数: 0

923 PERFORMANCE CHARACTERISTICS OF THERMOSETTING POLYURETHANE MODIFIED ASPHALT BINDER AND ITS MIXTURES 923 热固性聚氨酯改性沥青粘结剂及其混合物的性能特征

IF 0.5 4区材料科学

Materiali in tehnologije Pub Date : 2023-12-11 DOI: 10.17222/mit.2023.923

Qian Zhou, Fan Yang, Liming Yang, Shiguang Tang

{"title":"923 PERFORMANCE CHARACTERISTICS OF THERMOSETTING POLYURETHANE MODIFIED ASPHALT BINDER AND ITS MIXTURES","authors":"Qian Zhou, Fan Yang, Liming Yang, Shiguang Tang","doi":"10.17222/mit.2023.923","DOIUrl":"https://doi.org/10.17222/mit.2023.923","url":null,"abstract":"A new thermosetting polyurethane modified asphalt (TPUA) pavement material was developed to solve the unbalanced performance of traditional bridge deck pavement materials. Compared with the conventional bridge deck pavement materials, this work comprehensively evaluates the pavement performance of the TPUA binder and its mixture. The results indicate that the TPUA binder gradually shows elastic material properties at high temperatures and has excellent deformation resistance. The low-temperature flexibility of the TPUA binder is much better than that of SBS asphalt and epoxy asphalt (EA) binders. The TPUA binder is a viscoelastic material at low temperatures, and its creep meets the Burgers constitutive model. Moreover, the TPUA binder also has excellent mechanical properties and flexibility. In addition, the TPUA mixture has excellent mechanical properties, high-temperature deformation resistance and moisture stability. Its crack resistance at room temperature and low temperature is much better than those of SBS asphalt and EA mixture. This work will help us continue the development and performance research of TPUA pavement materials.","PeriodicalId":18258,"journal":{"name":"Materiali in tehnologije","volume":"10 3","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138980805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PROGRAM AND BOOK OF ABSTRACTS ICM&T 2023 程序和摘要之书[c]; [c]; 2023

4区材料科学

Materiali in tehnologije Pub Date : 2023-10-06 DOI: 10.17222/mit.1022.2023

Matjaž Godec, Črtomir Donik, Aleksandra Kocijan, Irena Paulin

引用次数: 0

EFFECT OF DIFFERENT APPLICATION PRESSURES ON ROTARY-FRICTION-WELDED AA2024-T6 JOINTS 不同施加压力对aa2024 - 16旋转摩擦焊接接头的影响

4区材料科学

Materiali in tehnologije Pub Date : 2023-10-03 DOI: 10.17222/mit.2023.834

Serkan Apay, Fatih Özen, Volkan Onar

{"title":"EFFECT OF DIFFERENT APPLICATION PRESSURES ON ROTARY-FRICTION-WELDED AA2024-T6 JOINTS","authors":"Serkan Apay, Fatih Özen, Volkan Onar","doi":"10.17222/mit.2023.834","DOIUrl":"https://doi.org/10.17222/mit.2023.834","url":null,"abstract":"An AA2024-T6 aluminium alloy was welded with a rotary-friction-welding technique using different forging pressures under constant friction pressure. It was found out that the increasing forging pressure has an adverse effect on the tensile strength of the welded joint. The maximum tensile strength was 366.22 MPa for a forging pressure of 80 MPa. However, the failure energies and elongations were decreased as the forging pressure increased. The minimum elongation was 15.45 %, while the minimum failure energy was 4.35 J with a forging pressure of 120 MPa. This situation is attributed to the loss of ductility up to a degree in high forging pressures and temperatures induced in the HAZ. In microstructural examinations the existence of the S phase has dominant role in determining the local hardness. The S phase is affected by the welding heat in the heat-affected zone, the thermomechanically affected zone and the dynamically recrystallized zone. The hardness is increased up to the middle of the TMAZ. In this zone the heat input caused an aging effect and increased the dispersed S phase in the intergranular zones. The aging mainly governed by the heat input increased the hardness up to beginning of the recrystallization zone.","PeriodicalId":18258,"journal":{"name":"Materiali in tehnologije","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135743640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STUDY OF THE PROPERTIES AND INTERFACIAL ENERGY OF GRAPHENE-MODIFIED ASPHALT BASED ON MOLECULAR DYNAMICS 基于分子动力学的石墨烯改性沥青性能及界面能研究

4区材料科学

Materiali in tehnologije Pub Date : 2023-10-03 DOI: 10.17222/mit.2023.878

Zhenlong Mo

引用次数: 0

EFFECT OF TEXTURED CUTTING INSERTS IN MICRO-TURNING OF TI-6AL-4V ALLOYS 织构切削齿对ti-6al-4v合金微车削加工的影响

4区材料科学

Materiali in tehnologije Pub Date : 2023-10-03 DOI: 10.17222/mit.2023.828

Samuel G.L., Rajesh Babu Tere

{"title":"EFFECT OF TEXTURED CUTTING INSERTS IN MICRO-TURNING OF TI-6AL-4V ALLOYS","authors":"Samuel G.L., Rajesh Babu Tere","doi":"10.17222/mit.2023.828","DOIUrl":"https://doi.org/10.17222/mit.2023.828","url":null,"abstract":"There is an increasing demand for higher machining quality and service life of the cutting tools used for the machining of high-strength alloys. Various studies revealed that textured cutting tools could improve the cutting performance by enhancing the tribological characteristics of the cutting regime. Advances in precision machining enabled the creation of micro/nano-textures on tool surfaces with excellent dimensional control. In this work, distinct micro designs, viz. horizontal line, vertical line and cross-hatch, are made, varying the pitch on the rake faces of coated carbide cutting inserts (CCMT060202LF KC5010). An in-house micro-turning machine was utilized to perform all the experiments in dry-cutting conditions. Micro-turning operations were performed using plain and textured inserts and varying the cutting parameters under dry conditions. The effectiveness of micro-scale textures at a contact interface was evaluated based on the cutting forces, tool flank wear and surface roughness. Compared to non-textured inserts, the machining using cross-hatch textured inserts with 100 µm pitch resulted in 50 % lower cutting forces, a 45 % improved surface finish and 37 % reduced tool flank wear. When machining with horizontal-line textured inserts with a 100 µm pitch, cutting forces are reduced by 46 %, the surface finish is enhanced by 34 % and the tool flank wear is lowered by 30 %. Similarly, when machining with vertical-line textured inserts with a 100 µm pitch, cutting forces are minimized by 38 %, the surface finish is improved by 20 % and the tool flank wear is lowered by 26 %. Additionally, a durability test was conducted for the inserts, and the results showed that the cross-hatch textured tool life improved by 80 %, the life of the horizontal-line textured tool increased by 50 % and the life of the vertical-line textured tool increased by 40 % compared to plain inserts. The heat dissipation and tool-chip friction during machining are thus significantly influenced by the texturing, namely by its design, dimensions and orientation.","PeriodicalId":18258,"journal":{"name":"Materiali in tehnologije","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135744875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NbC-BASED CERMET PRODUCTION COMPARISON: L-PBF ADDITIVE MANUFACTURING VERSUS CONVENTIONAL LPS POWDER METALLURGY 基于nbc的金属陶瓷生产比较:L-PBF增材制造与传统LPS粉末冶金

4区材料科学

Materiali in tehnologije Pub Date : 2023-10-03 DOI: 10.17222/mit.2023.972

Fabio Miranda, Marcelo Otavio Dos Santos, Daniel Rodrigues, Rodrigo Santiago Coelho, Gilmar Ferreira Batalha

{"title":"NbC-BASED CERMET PRODUCTION COMPARISON: L-PBF ADDITIVE MANUFACTURING VERSUS CONVENTIONAL LPS POWDER METALLURGY","authors":"Fabio Miranda, Marcelo Otavio Dos Santos, Daniel Rodrigues, Rodrigo Santiago Coelho, Gilmar Ferreira Batalha","doi":"10.17222/mit.2023.972","DOIUrl":"https://doi.org/10.17222/mit.2023.972","url":null,"abstract":"The production of carbide parts (cermet) by additive manufacturing, such as laser powder bed fusion (L-PBF), has been a great challenge due to the complex optimization of process parameters to improve density, porosity, microcracks or abnormal growth of grains and obtain a microstructure as homogeneous as possible. This work aims to compare the evolution of the microstructure when using the conventional route of powder metallurgy, i.e., liquid phase sintering (LPS) with the L-PBF direct additive manufacturing process, considering the NbC-based carbide material. Sample compositions were prepared in w/%, samples were compacted under 50–125 MPa, without polymeric binders, and they were sintered under a vacuum at temperatures of 1330 °C and 1370 °C. For the L-PBF process, a vibrating device made it possible to improve the fluidity of the mixtures of three alloys, NbC–30Co, NbC–30Ni and NbC–30(Co, Ni). The mixtures exhibited low sphericity, low fluidity and compressibility, which were improved with a roller compactor. Thin powder mixture deposition layers were evenly applied and well distributed across the powder bed to avoid defects and cracks during sintering. The L-PBF process parameters varied including a power of 50–125 W and a laser scanning speed of 25–125 mm·s–1. Different microstructures, identified with a light microscope (LM) and a scanning electron microscope (SEM), and properties obtained with the two processes, direct (L–PBF) and indirect sintering (LPS), were compared.","PeriodicalId":18258,"journal":{"name":"Materiali in tehnologije","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135739651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INFLUENCE OF TEMPERING TEMPERATURE ON THE MICROSTRUCTURE AND ULTIMATE TENSILE STRENGTH OF 28Cr3SiNiMoWV STEEL 回火温度对28cr3sininmowv钢组织和极限抗拉强度的影响

4区材料科学

Materiali in tehnologije Pub Date : 2023-10-03 DOI: 10.17222/mit.2023.787

Ngoc Minh Nguyen, Hanh Ngan Vu

引用次数: 0