Pub Date : 2023-06-02DOI: 10.1590/1980-5373-MR-2023-0015
R. Lima, J. Spadotto, F. Tolomelli, Maria Isabel Ramos Navarro, A. Clarke, K. Clarke, F. Assunção
The demand for new advanced high strength steels (AHSS) has been increasing in the last few decades. A large part of this demand comes from automotive companies. We have produced a new complex-phase (CP) steel with 1200 MPa of mechanical resistance and 8% of elongation, called CP1200. In this paper the dilatometric and microstructural characterization of a newly produced CP1200 steel is presented. The new steel was produced by making changes to the heat treatment of the already industrially available CP1100. The microstructure was quantified using light optical microscopy (LOM) and electron backscatter diffraction (EBSD). The microstructure of both steels was compared to identify the origin of the mechanical properties improvement. A new microstructure distribution, with higher amount of bainite and smaller concentration of ferrite and martensite was identified.
{"title":"Microstructural Characterization of a 1200 MPa Complex-Phase Steel","authors":"R. Lima, J. Spadotto, F. Tolomelli, Maria Isabel Ramos Navarro, A. Clarke, K. Clarke, F. Assunção","doi":"10.1590/1980-5373-MR-2023-0015","DOIUrl":"https://doi.org/10.1590/1980-5373-MR-2023-0015","url":null,"abstract":"The demand for new advanced high strength steels (AHSS) has been increasing in the last few decades. A large part of this demand comes from automotive companies. We have produced a new complex-phase (CP) steel with 1200 MPa of mechanical resistance and 8% of elongation, called CP1200. In this paper the dilatometric and microstructural characterization of a newly produced CP1200 steel is presented. The new steel was produced by making changes to the heat treatment of the already industrially available CP1100. The microstructure was quantified using light optical microscopy (LOM) and electron backscatter diffraction (EBSD). The microstructure of both steels was compared to identify the origin of the mechanical properties improvement. A new microstructure distribution, with higher amount of bainite and smaller concentration of ferrite and martensite was identified.","PeriodicalId":18272,"journal":{"name":"Materials Research","volume":"247 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139370989","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 : 2021-09-15DOI: 10.1590/1980-5373-mr-2021-0232
Hector J. Dorantes-Rosalesa, C. Ferreira-Palma, Victor M. Lopez-Hirata, Maribel L. Saucedo-Muñoza,, Erika O. Avila-Davila, Felipe ernandez-Santiago, José D. Villegas-Cárdenas, D. Rivas-López
Abstract A precipitation study was carried out during the isothermal aging at 850 °C for Fe-10at.%Ni-15at.%Al, Fe-10at.%Ni-15at.%Al-2.5at.%Cu and Fe-10at.%Ni-15at.%Al-5at.%Cu alloys. The experimental, Calphad, and Kinetic/Precipitation calculated results indicated that the Cu-addition to the ternary alloy promoted a higher volume fraction of β´precipitates, which caused a better aging response for the Cu-containing alloys. The coarsening resistance was the highest for the 2.5 at. % Cu-containing alloy, compared to the ternary alloy because of its lower interfacial free energy, 0.009 Jm-2, between the precipitate and the matrix. The Cu alloying element was located mainly in the β´ precipitate according to its expected thermodynamic behavior, and it caused an atomic relation of Ni to Al close to that of NiAl intermetallic compound for the β´phase. A content of 5 at. % Cu in the ternary alloy promoted higher interfacial energy, 0.04 Jm-2, and thus the fastest coarsening process.
摘要:对Fe-10at.%Ni-15at在850℃等温时效过程中的析出进行了研究。%, Fe-10at. % Ni-15at. % Al - 2.5。%Cu和fe -10at， % ni -15at， %Al-5at。%铜合金。实验、calphhad和动力学/析出计算结果表明，cu的加入使三元合金中β′析出相的体积分数提高，使含cu合金的时效响应变好。2.5 at的抗粗化性最高。与三元合金相比，含cu合金的析出相与基体之间的界面自由能较低，为0.009 Jm-2。Cu合金元素主要位于β′相中，使Ni与Al的原子关系接近于NiAl金属间化合物在β′相中的原子关系。含量为5 at。% Cu在三元合金中促进了较高的界面能，为0.04 Jm-2，因此粗化过程最快。
{"title":"Growth Kinetics of β´Precipitation in a Ferritic Matrix During Isothermal Aging of Cu-containing Fe-10at.%Ni-15at.%Al alloys","authors":"Hector J. Dorantes-Rosalesa, C. Ferreira-Palma, Victor M. Lopez-Hirata, Maribel L. Saucedo-Muñoza,, Erika O. Avila-Davila, Felipe ernandez-Santiago, José D. Villegas-Cárdenas, D. Rivas-López","doi":"10.1590/1980-5373-mr-2021-0232","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2021-0232","url":null,"abstract":"Abstract A precipitation study was carried out during the isothermal aging at 850 °C for Fe-10at.%Ni-15at.%Al, Fe-10at.%Ni-15at.%Al-2.5at.%Cu and Fe-10at.%Ni-15at.%Al-5at.%Cu alloys. The experimental, Calphad, and Kinetic/Precipitation calculated results indicated that the Cu-addition to the ternary alloy promoted a higher volume fraction of β´precipitates, which caused a better aging response for the Cu-containing alloys. The coarsening resistance was the highest for the 2.5 at. % Cu-containing alloy, compared to the ternary alloy because of its lower interfacial free energy, 0.009 Jm-2, between the precipitate and the matrix. The Cu alloying element was located mainly in the β´ precipitate according to its expected thermodynamic behavior, and it caused an atomic relation of Ni to Al close to that of NiAl intermetallic compound for the β´phase. A content of 5 at. % Cu in the ternary alloy promoted higher interfacial energy, 0.04 Jm-2, and thus the fastest coarsening process.","PeriodicalId":18272,"journal":{"name":"Materials Research","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79824407","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 : 2021-01-01DOI: 10.1590/1980-5373-MR-2020-0321
Luan Thanh Nguyen, Hai Le Tran, P. Mai, Vu Ba Duong, Le-Thu T. Nguyen, H. T. Nguyen
{"title":"Poly(L-glutamic acid) via catalytical hydrogenation for the fabrication of carbon nanotube nanocomposites","authors":"Luan Thanh Nguyen, Hai Le Tran, P. Mai, Vu Ba Duong, Le-Thu T. Nguyen, H. T. Nguyen","doi":"10.1590/1980-5373-MR-2020-0321","DOIUrl":"https://doi.org/10.1590/1980-5373-MR-2020-0321","url":null,"abstract":"","PeriodicalId":18272,"journal":{"name":"Materials Research","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73127776","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 : 2020-01-01DOI: 10.1590/1980-5373-MR-2020-0309
F. Santini, A. Plaine, C. Afonso, Luciano Bergmann, N. Alcântara, J.M.F. dos Santos, M. Miyazaki
aUniversidade Federal de São Carlos, Departamento de Engenharia de Materiais, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Rod. Washington Luiz, km 235, 13565-905, São Carlos, SP, Brasil bUniversidade do Estado de Santa Catarina, Departamento de Engenharia Mecânica,Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Rua Paulo Malschitzki, 89219-710, Joinville, SC, Brasil cHelmholtz-Zentrum Geesthacht, Institute of Materials Research, Materials Mechanics, Solid State Joining Processes, Max-Planck-Str. 1, 21502, Geesthacht, Germany dEmbraer S.A., Rod. Presidente Dutra, km 134, 12247-004, São José dos Campos, SP, Brasil
联邦大学sao卡洛斯，材料工程系，材料科学与工程研究生项目，Rod。华盛顿鲁兹,235公里,13565 - -905,是查尔斯SP,巴西圣卡塔琳娜州的州bUniversidade机械工程系,在材料科学与工程研究生课程,保罗Malschitzki街89219号-710,本部、SC、巴西cHelmholtz -Zentrum Geesthacht材料研究所,材料力学,固体加入苏,并不-Str。= =地理= =根据美国人口普查，这个县的总面积是，其中土地和(2.641平方公里)水。杜特拉总统，km 134, 12247-004, sao jose dos Campos, SP，巴西
{"title":"Microstructure Features and Mechanical Properties of Double-Sided Friction Stir Welded Joints of AA2050-T84 Thick Plates","authors":"F. Santini, A. Plaine, C. Afonso, Luciano Bergmann, N. Alcântara, J.M.F. dos Santos, M. Miyazaki","doi":"10.1590/1980-5373-MR-2020-0309","DOIUrl":"https://doi.org/10.1590/1980-5373-MR-2020-0309","url":null,"abstract":"aUniversidade Federal de São Carlos, Departamento de Engenharia de Materiais, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Rod. Washington Luiz, km 235, 13565-905, São Carlos, SP, Brasil bUniversidade do Estado de Santa Catarina, Departamento de Engenharia Mecânica,Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Rua Paulo Malschitzki, 89219-710, Joinville, SC, Brasil cHelmholtz-Zentrum Geesthacht, Institute of Materials Research, Materials Mechanics, Solid State Joining Processes, Max-Planck-Str. 1, 21502, Geesthacht, Germany dEmbraer S.A., Rod. Presidente Dutra, km 134, 12247-004, São José dos Campos, SP, Brasil","PeriodicalId":18272,"journal":{"name":"Materials Research","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84468428","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 : 2020-01-01DOI: 10.1590/1980-5373-mr-2019-0487
L. Piaia, G. Salmoria, D. Hotza
Tissue Engineering aims to repair, regenerate or restore damaged tissues. Structures known as scaffolds can be manufactured in different ways and with various materials such as synthetic and natural polymers as well as inorganic materials. Additive Manufacturing (AM) has been used to produce porous scaffolds. Particularly, Selective Laser Sintering (SLS) produces materials and composites through a selective solidification of a variety of fine powders. AM-made biomaterials may be suitable for different affected or injured parts by stimulating the biological system around the implant. The present work aims to review relevant concepts concerning the nanostructure for regeneration of the bone tissue when in contact with the native tissue, as well as the suitable techniques and materials to fabricate it
{"title":"Additive Manufactured Nanocomposites for Bone Tissue Engineering Applications: an Overview","authors":"L. Piaia, G. Salmoria, D. Hotza","doi":"10.1590/1980-5373-mr-2019-0487","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2019-0487","url":null,"abstract":"Tissue Engineering aims to repair, regenerate or restore damaged tissues. Structures known as scaffolds can be manufactured in different ways and with various materials such as synthetic and natural polymers as well as inorganic materials. Additive Manufacturing (AM) has been used to produce porous scaffolds. Particularly, Selective Laser Sintering (SLS) produces materials and composites through a selective solidification of a variety of fine powders. AM-made biomaterials may be suitable for different affected or injured parts by stimulating the biological system around the implant. The present work aims to review relevant concepts concerning the nanostructure for regeneration of the bone tissue when in contact with the native tissue, as well as the suitable techniques and materials to fabricate it","PeriodicalId":18272,"journal":{"name":"Materials Research","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86957479","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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