Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222818
Helbert Francisco, W. Lopes, Elaine Carballo Siqueira Correa
{"title":"Estudo da evolução do encruamento e das deformações do aço AISI 430 após estampagem","authors":"Helbert Francisco, W. Lopes, Elaine Carballo Siqueira Correa","doi":"10.4322/2176-1523.20222818","DOIUrl":"https://doi.org/10.4322/2176-1523.20222818","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70527368","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20232766
Juliana dos Santos Carneiro da Cunha, L. Nascimento, U. O. Costa, A. B. S. Figueiredo, S. Monteiro
Natural fiber-reinforced matrix polymer composites have shown great potential for engineering applications including ballistic protection. However, The Amazon region is full of natural fibers that have not yet been the fully studied and that might have important properties making them more attractive than synthetic fibers. This work presents a novel composite material consisting of titica vine fibers (Heteropsis flexuosa) reinforcing epoxy resin, for possible application in ballistic armor. Composite plates with different volumetric fractions of titica vine fibers (TVF) were subjected to a ballistic test, which consisted of firing multiple shots using .22 LR caliber ammunition. Through the results, it was possible to observe, with statistical validation by Weibull and ANOVA analyses, as well as the Tukey test, that a greater absorption of energy occurred for the conditions of 0 to 20 vol%, but with considerable loss of integrity. On the other hand, the 30 and 40 vol% samples have shown better integrity. In addition, the V L calculated for the samples with the highest percentage of fibers was lower than those found for the composites with 10 and 20 vol%. Thus, the higher the volumetric fraction of TVF, the lower the impact energy absorption capacity. This behavior corroborates the analysis by scanning electron microscopy (SEM) of the fracture surfaces of the composites after the ballistic test. For composites with less than 20 vol% TVF, brittle fractures evidences were observed, responsible for absorbing more impact energy. On the other hand, for other compositions, there was a predominance of complex mechanisms characteristic of ductile fracture, responsible for absorbing less energy, but still maintaining the integrity of the protection.
{"title":"Ballistic performance of epoxy composites reinforced with Amazon titica vine fibers","authors":"Juliana dos Santos Carneiro da Cunha, L. Nascimento, U. O. Costa, A. B. S. Figueiredo, S. Monteiro","doi":"10.4322/2176-1523.20232766","DOIUrl":"https://doi.org/10.4322/2176-1523.20232766","url":null,"abstract":"Natural fiber-reinforced matrix polymer composites have shown great potential for engineering applications including ballistic protection. However, The Amazon region is full of natural fibers that have not yet been the fully studied and that might have important properties making them more attractive than synthetic fibers. This work presents a novel composite material consisting of titica vine fibers (Heteropsis flexuosa) reinforcing epoxy resin, for possible application in ballistic armor. Composite plates with different volumetric fractions of titica vine fibers (TVF) were subjected to a ballistic test, which consisted of firing multiple shots using .22 LR caliber ammunition. Through the results, it was possible to observe, with statistical validation by Weibull and ANOVA analyses, as well as the Tukey test, that a greater absorption of energy occurred for the conditions of 0 to 20 vol%, but with considerable loss of integrity. On the other hand, the 30 and 40 vol% samples have shown better integrity. In addition, the V L calculated for the samples with the highest percentage of fibers was lower than those found for the composites with 10 and 20 vol%. Thus, the higher the volumetric fraction of TVF, the lower the impact energy absorption capacity. This behavior corroborates the analysis by scanning electron microscopy (SEM) of the fracture surfaces of the composites after the ballistic test. For composites with less than 20 vol% TVF, brittle fractures evidences were observed, responsible for absorbing more impact energy. On the other hand, for other compositions, there was a predominance of complex mechanisms characteristic of ductile fracture, responsible for absorbing less energy, but still maintaining the integrity of the protection.","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70527534","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222731
M. Oliveira, A. Peres, L. A. Silva
{"title":"Flotação seletiva de minério fosfático sílico-carbonatado com coletores anfotéricos","authors":"M. Oliveira, A. Peres, L. A. Silva","doi":"10.4322/2176-1523.20222731","DOIUrl":"https://doi.org/10.4322/2176-1523.20222731","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70526705","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222717
Arthur Cançado Schuttenberg, V. D. S. Lima, J. Rocha, Geraldo Lúcio de Faria
{"title":"Efeito da temperatura de austenitização intercrítica sobre a cinética de transformação martensítica e evolução microestrutural de um aço API-OCTG grau K55","authors":"Arthur Cançado Schuttenberg, V. D. S. Lima, J. Rocha, Geraldo Lúcio de Faria","doi":"10.4322/2176-1523.20222717","DOIUrl":"https://doi.org/10.4322/2176-1523.20222717","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70527091","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222809
Luiz Bernardo Varela Jimenez, Milena Tosti Umemura, J. Calderón-Hernández, R. Magnabosco, C. Pinedo, A. P. Tschiptschin
{"title":"Plasma nitriding of 410S ferritic/martensitic stainless steel: microstructure, wear and corrosion properties","authors":"Luiz Bernardo Varela Jimenez, Milena Tosti Umemura, J. Calderón-Hernández, R. Magnabosco, C. Pinedo, A. P. Tschiptschin","doi":"10.4322/2176-1523.20222809","DOIUrl":"https://doi.org/10.4322/2176-1523.20222809","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70527347","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222769
C. S. Kiminami, G. Koga, C. Bolfarini, W. Botta
{"title":"Development of Fe-based glass former alloys for thermal spray coatings with optimized corrosion and wear properties","authors":"C. S. Kiminami, G. Koga, C. Bolfarini, W. Botta","doi":"10.4322/2176-1523.20222769","DOIUrl":"https://doi.org/10.4322/2176-1523.20222769","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70527495","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222732
Fabrizzio Rodrigues Costa, G. Nery, Carina Ulsen
{"title":"Pré-concentração de minério de ouro para caracterização das formas de ocorrência e associações minerais","authors":"Fabrizzio Rodrigues Costa, G. Nery, Carina Ulsen","doi":"10.4322/2176-1523.20222732","DOIUrl":"https://doi.org/10.4322/2176-1523.20222732","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70526718","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222660
Raphael Alves da Silva, Rafael Mayrink Nunes, F. Nogueira, Fabiane Monteiro da Silva
{"title":"Aproveitamento do rejeito de minério de ferro da Mina do Andrade para a confecção de blocos intertravados","authors":"Raphael Alves da Silva, Rafael Mayrink Nunes, F. Nogueira, Fabiane Monteiro da Silva","doi":"10.4322/2176-1523.20222660","DOIUrl":"https://doi.org/10.4322/2176-1523.20222660","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70526742","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222690
Gleicon Roberto de Sousa Maior, Juliano Tessinari Zagôto, Marciel Zucoloto Pizetta, Arthur Pereira Pires
{"title":"Otimização do polimento de chapas de rochas ornamentais com uso de programação linear","authors":"Gleicon Roberto de Sousa Maior, Juliano Tessinari Zagôto, Marciel Zucoloto Pizetta, Arthur Pereira Pires","doi":"10.4322/2176-1523.20222690","DOIUrl":"https://doi.org/10.4322/2176-1523.20222690","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70527002","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}
Pub Date : 2023-01-01DOI: 10.4322/2176-1523.20222723
D. Rocha, Leonardo Neves
{"title":"Modelo matemático e estatístico para o mapeamento do volume morto no interior do distribuidor de lingotamento contínuo","authors":"D. Rocha, Leonardo Neves","doi":"10.4322/2176-1523.20222723","DOIUrl":"https://doi.org/10.4322/2176-1523.20222723","url":null,"abstract":"","PeriodicalId":53327,"journal":{"name":"Tecnologia em Metalurgia Materiais e Mineracao","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70527103","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}
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