Materia-rio De Janeiro最新文献_第2页

Escória de Alto Forno como substituição parcial ao cimento Portland 高炉炉渣部分替代硅酸盐水泥

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0120

Marcelo Martins Farias, Celestina Lima de Rezende Farias, Marcelo de Souza Picanço

引用次数: 0

Mechanical properties of asphalt mixtures containing reclaimed asphalt incorporating Acrylonitrile Butadiene Styrene (ABS) 含丙烯腈-丁二烯-苯乙烯(ABS)再生沥青混合料的力学性能

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0201

Kamalasekar Athiappan, Rajiah Murugasan, Chandrakasu Makendran, Francis Michael Raj

引用次数: 1

Investigation of specimen size effect on the use of double punch test as quality control method of the steel fiber reinforced shotcrete 双冲试验作为钢纤维喷射混凝土质量控制方法对试件尺寸影响的研究

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0147

Felipe Pereira Santos, Alan Renato Estrada Cáceres, Rafael Celeghini Santiago, Antonio Domingues de Figueiredo, Luís Antônio Guimarães Bitencourt Júnior

引用次数: 0

Influence of eco-friendly lightweight aggregates in mechanical and durability properties of geopolymer concrete 环保轻骨料对地聚合物混凝土力学性能和耐久性的影响

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0209

Parvathi Rajalekshmi, Prakash Arul Jose

{"title":"Influence of eco-friendly lightweight aggregates in mechanical and durability properties of geopolymer concrete","authors":"Parvathi Rajalekshmi, Prakash Arul Jose","doi":"10.1590/1517-7076-rmat-2023-0209","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0209","url":null,"abstract":"This research is to replace natural coarse aggregate as 20%, 40%, 60%, 80%, and 100% respectively, by weight in an M20 grade geopolymer concrete. The geopolymer concrete with different mixes is subjected to fresh, hardened, and durability tests. Utilization of thermal ash aggregates increased the slump and compressive strength of geopolymer concrete by about 15% and 9% respectively. Whereas the slump and compressive strength of geopolymer concrete decreased by about 30% and 38% respectively by using 100% Lightweight Expanded Clay Aggregate (LECA). Density reduction in geopolymer concrete was found by using both thermal ash aggregate and lightweight expanded clay aggregate for about 9% and 28% respectively. Thermal ash aggregate decreased the density of geopolymer concrete up to 1850 kg/m3 and improved the strength up to 24.50 N/mm2, on the other side using lightweight expanded clay aggregate, the density of geopolymer concrete drastically decreased up to 1250 kg/m3 with a huge decrease in strength up to 14 N/mm2. Other mechanical test results showed similar variations with respect to the compression test results. To ensure the durability of lightweight geopolymer concrete for mixes of GPC, TM5, and LM2 conducted tests like acid resistance, sulphate resistance, salt resistance, water absorption, accelerated corrosion, and sorptivity test.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135214716","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

Efeito da temperatura e pressão nas propriedades da liga de titânio Ti-6Aℓ-4V produzida a partir da metalurgia do pó 温度和压力影响钛合金的性质你6ℓ4 v产生粉末冶金

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0196

Ricardo Alan da Silva Vieira, Erbenia Taciane Fernandes da Fonseca, Manoel Quirino da Silva Júnior, Edgley Alves de Oliveira Paula, Fernanda Monique da Silva, Felipe Bento de Albuquerque, Joalis Barbalho de Souza, Fernando Rusch, Mário Vanoli Scatolino, Rafael Rodolfo de Melo

{"title":"Efeito da temperatura e pressão nas propriedades da liga de titânio Ti-6Aℓ-4V produzida a partir da metalurgia do pó","authors":"Ricardo Alan da Silva Vieira, Erbenia Taciane Fernandes da Fonseca, Manoel Quirino da Silva Júnior, Edgley Alves de Oliveira Paula, Fernanda Monique da Silva, Felipe Bento de Albuquerque, Joalis Barbalho de Souza, Fernando Rusch, Mário Vanoli Scatolino, Rafael Rodolfo de Melo","doi":"10.1590/1517-7076-rmat-2023-0196","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0196","url":null,"abstract":"RESUMO Foram caracterizadas micro estruturalmente e mecanicamente a liga Ti-6Aℓ-4V obtida através da metalurgia do pó em atmosfera não controlada variando os parâmetros de sinterização. As amostras foram compactadas em uma prensa uniaxial à 874 MPa, 999 MPa e 1124 MPa, e sinterizadas sem atmosfera protetora ou vácuo, nas temperaturas de 675 °C, 750 °C e 850 °C. Ao sinterizar o material, houve influência dos óxidos nos resultados devido à alta afinidade que o titânio tem por elementos intersticiais, promovendo um aumento na densidade e elevados valores de dureza. A partir dos resultados verificou-se que o tratamento realizado na pressão de 1124 MPa e temperatura de 750 °C foi o que apontou a maior dureza na fase beta (β), sendo o valor de 1165,1 HV. Na fase alfa (α), o maior valor foi de 1321,3 HV, apresentado pelo tratamento realizado na pressão de 999 MPa e temperatura de 850 °C. Os elevados valores na dureza observados na liga estão associados ao reforço promovido pela dissolução átomos de Fe. Materiais com elevada dureza possuem uma vasta aplicação nas indústrias aeroespaciais e biomédicas, que buscam sempre por melhores resultados de resistência mecânica, aumentando assim a vida útil e a aplicabilidades de seus produtos.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136202598","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

Análise das tensões residuais utilizando método DPC na soldagem GTAW multipasse do aço ASTM A131 AH36 com chanfros em “V” e em “U” ASTM A131 AH36钢V型和U型倒角多道GTAW焊接中残余应力的DPC分析

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0212

Danilo Helder de Melo Pereira, Douglas Henrique de Melo Pereira, Romulo Rocha de Araújo Lima, Ionaldo Bezerra Alves dos Passos, Lindembergue Pereira Costa Júnior, Ricardo Artur Sanguinetti Ferreira

{"title":"Análise das tensões residuais utilizando método DPC na soldagem GTAW multipasse do aço ASTM A131 AH36 com chanfros em “V” e em “U”","authors":"Danilo Helder de Melo Pereira, Douglas Henrique de Melo Pereira, Romulo Rocha de Araújo Lima, Ionaldo Bezerra Alves dos Passos, Lindembergue Pereira Costa Júnior, Ricardo Artur Sanguinetti Ferreira","doi":"10.1590/1517-7076-rmat-2023-0212","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0212","url":null,"abstract":"RESUMO Análise de tensões residuais realizada em juntas soldadas pelo processo TIG utilizando metal de base ASTM A131 AH36 comparando diferentes projetos de junta. Uma parte com chanfro usinado em formato de “V” e outra em forma de “U”. Também foi correlacionado variáveis de acabamento com passe único oscilante ou com passe duplo retilíneo. O resultado das tensões foi obtido através do método DPC (deslocamento de pontos coordenados). Os corpos de prova foram soldados segundo as normas (fabricação e qualificação) AWS D1.1. Após a soldagem foram realizadas furações na zona termicamente afetada nas mediações centrais do eixo de soldagem em uma mesa de medição por coordenadas. As soldas foram submetidas a tratamento térmico para alívio de tensões (TTAT) e mensurou-se os deslocamentos dos furos causados pelo TTAT, possibilitando o cálculo das tensões residuais. Os resultados demostraram menores níveis de tensões juntas em “U” e boa aplicabilidade do método DPC.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135495082","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

Effect of surface parameters on anti-loosening performance of bolts for engineering machinery 表面参数对工程机械螺栓抗松性能的影响

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0159

Can Wang, Qingchao Sun, Shuaishuai Han

引用次数: 0

Structural performance of hybrid FRP laminates on concrete beams made with manufactured sand 复合玻璃钢层合板在砂制混凝土梁上的结构性能

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0186

Manikandan Kesavakannan, Ramasamy Vasudevan

引用次数: 0

Experimental investigation on mechanical behavior of geopolymer light weight concrete 地聚合物轻质混凝土力学性能试验研究

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0160

Suresh Kumar Paramasivam, Suganya Rajendran

{"title":"Experimental investigation on mechanical behavior of geopolymer light weight concrete","authors":"Suresh Kumar Paramasivam, Suganya Rajendran","doi":"10.1590/1517-7076-rmat-2023-0160","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0160","url":null,"abstract":"The development of lightweight geopolymer concrete is the main goal of this research work, and the outcomes were evaluated in comparison to the control mix. In this work, geopolymer concrete was produced using fly ash as a binder, synthetic sand as M-sand as fine aggregate, and coconut shell as well as palm shell ash for coarse aggregate. For the purpose of selecting a mix proportion via trial mixes, an initial investigation was conducted. The quantity among binder, fine and coarse aggregate, sodium hydroxide molarity, sodium silicate: sodium hydroxide ratio, the alkaline binder ratio is some of the significant variables taken into account in the current study. Investigation of the effects of various factors on the engineering characteristics of geopolymer concrete. The trial mixes were utilized to evaluate the characteristics for geopolymer concrete with a ratio of 1: 2.36 :1.02 and a Molarity of 16 with binder ratio 0.6 The key findings of this investigation is to that the coconut shell waste and palm shell can be replaced instead of fine aggregate. In-depth research was done on the mechanical behavior with geopolymer concrete, such as the mechanical and durability characteristics with control mix.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135151774","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

Analysis of the influence of the composition and quenching parameters on the performance of some dual phase in HSLA steels 分析了成分和淬火参数对某些HSLA钢双相性能的影响

4区材料科学

Materia-rio De Janeiro Pub Date : 2023-01-01 DOI: 10.1590/1517-7076-rmat-2023-0144

Hektor Oliveira Borges, Jorge Luis Braz Medeiros, Luciano Volcanoglo Biehl, Carlos Otávio Damas Martins, Carlos Alberto Mendes Moraes, José de Souza

{"title":"Analysis of the influence of the composition and quenching parameters on the performance of some dual phase in HSLA steels","authors":"Hektor Oliveira Borges, Jorge Luis Braz Medeiros, Luciano Volcanoglo Biehl, Carlos Otávio Damas Martins, Carlos Alberto Mendes Moraes, José de Souza","doi":"10.1590/1517-7076-rmat-2023-0144","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0144","url":null,"abstract":"Due to its combination of high mechanical properties, good formability, and low production cost, steel is a key material with potential for improvement in the metallurgical industry. Based on these conditions, this research evaluated the influence of material composition and incomplete austenitization parameters on the final metallurgical and mechanical properties of high-strength microalloyed steels after cooling in a medium with high severity. The applied cycle was based on the intercritical thermal treatment of microalloyed steels with niobium (Nb) and titanium (Ti) to increase the mechanical resistance and guarantee the tenacity of the material. An experimental study was carried out testing three intercritical temperatures, 806 °C, 775 °C, and 740 °C, with subsequent cooling in polymeric solutions in water. The studies showed that the intercritical temperature variation directly contributed to the difference in the second phase microstructure present in the samples. The heat treatment findings resulted in a microhardness of 434.2 HV0.01, characterizing the low-carbon martensite. The presence of a matrix consisting of ferrite and a second phase of low-carbon martensite promoted the typical behavior of dual phase steel. In the x ray diffraction, the presence of retained austenite was not evidenced, indicating the efficiency of the cooling rate. The experiments confirmed the influence of different engineering parameters and intercritical treatment on the mechanical properties. The study enriches the current knowledge about the development of variables for the development of dual phase steel from microalloying elements.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136202399","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