Revue De Metallurgie-cahiers D Informations Techniques最新文献_第3页

the influence of the processing parameters on the porosity and microhardness of sintered ti-20nb biomedical alloy 工艺参数对烧结ti-20nb生物医用合金孔隙率和显微硬度的影响

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3581

L. Benić, Gorana Domitrović, Žiga Erman, J. Šubić

{"title":"the influence of the processing parameters on the porosity and microhardness of sintered ti-20nb biomedical alloy","authors":"L. Benić, Gorana Domitrović, Žiga Erman, J. Šubić","doi":"10.37904/metal.2020.3581","DOIUrl":"https://doi.org/10.37904/metal.2020.3581","url":null,"abstract":"Titanium based alloys are increasingly used in biomedicine due to their favourable properties. However, because of their high cost, new methods are being developed to produce more economical alloys. Therefore, in the framework of this work, Ti-20Nb alloy was produced by powder metallurgy. Namely, experimental alloy was prepared by mechanical alloying in a ball mill. The samples were singled out from the powder mixture and pressed on a hydraulic press. Sintering was carried out in a tube furnace in an argon atmosphere. Different processing parameters regarding the time and temperature of sintering were applied. Chemical homogeneity was analysed using the energy-dispersive spectrometry. Porosity was observed using the light microscope and microhardness was determined by Vickers method. The obtained results show that with a small correction of the applied technological parameters, in terms of time extension of mixing/mechanical alloying, it is possible to produce economically Ti-20Nb alloy having the properties suitable for biomedical application by using powder metallurgy technology.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82951151","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

APPLICATION OF EXPLICIT-IMPLICIT CO-SIMULATION TECHNIQES INto THE ROLL PASS DESIGN OF CHANNELS WITH LARGE DEFORMATIONS 显式-隐式联合模拟技术在大变形通道滚道设计中的应用

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3479

M. Dziedzic, S. Turczyn

{"title":"APPLICATION OF EXPLICIT-IMPLICIT CO-SIMULATION TECHNIQES INto THE ROLL PASS DESIGN OF CHANNELS WITH LARGE DEFORMATIONS","authors":"M. Dziedzic, S. Turczyn","doi":"10.37904/metal.2020.3479","DOIUrl":"https://doi.org/10.37904/metal.2020.3479","url":null,"abstract":"The practical aim of the following study was to develop a new roll pass design (RPD) of the channels (UPN) and introduce it into industrial rolling. The necessity of usage of a charge stock with a greater cross section has caused necessity of an application of the new rolling schedule characterized by large deformations. The investigations are based on an explicit–implicit co-simulation techniques applied in the ABAQUS commercial code. A complete production line containing all passes for forming the section including break-down, intermediate and finishing sequences are modelled. The data of exit section from subsequent pass is imported as the entering material for the next pass. The series of the plastometric tests were performed to obtain characteristic data of the rolled steel, which were required for the subsequent computer calculations. The metal flow in the roll grooves in each stand, separation force and roll torque in each pass are also calculated. It can be concluded that the explicit–implicit co-simulation techniques used in the analysis are an efficient and accurate enough application for the roll pass design of the steel sections.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86606381","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

Basic Characteristics of Widmanstätten austenite in goes goes中Widmanstätten奥氏体的基本特征

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3505

Kryštof Hradečný, Renáta Palupčíková, A. Volodarskaja, V. Vodárek

引用次数: 0

Evolution of Structure and Properties of Nickel-Enriched Ti-Ni Shape Memory Alloy subjected to Compressive Deformation 压缩变形下富镍Ti-Ni形状记忆合金的组织与性能演变

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3623

V. Komarov, I. Khmelevskaya, R. Karelin, V. Yusupov, I. Postnikov, G. Korpała, R. Kawalla, U. Prahl, S. Prokoshkin

引用次数: 0

An investigation on thermodynamics and kinetics of η phase formation in Nb-modified iron-nickel base A286 superalloy nb改性铁镍基A286高温合金η相形成的热力学和动力学研究

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.1051/metal/2020084

Reza Soleimani Gilakjani, S. H. Razavi, M. Seifollahi

{"title":"An investigation on thermodynamics and kinetics of η phase formation in Nb-modified iron-nickel base A286 superalloy","authors":"Reza Soleimani Gilakjani, S. H. Razavi, M. Seifollahi","doi":"10.1051/metal/2020084","DOIUrl":"https://doi.org/10.1051/metal/2020084","url":null,"abstract":"In this study, precipitation of η phase (Ni3 Ti) in conventional and Nb-modified (Nb-A286) A286 superalloys was evaluated at different aging times and temperatures. The TTP curve of the η phase formation was plotted using thermodynamic analyses, kinetics and microstructural studies. Depending on temperature and heat treatment, the η phase precipitated at the grain boundaries or twin sites, as a result of the γ′ phase or matrix austenite transformation. Heat treatment of conventional A286 superalloy and Nb-A286 was performed within a temperature range of 650 to 900 °C for 2 to 30 h. The η phase transformation was evaluated by scanning electron microscope (SEM) which is equipped to energy dispersive X-ray spectroscopy (EDS) and optical microscopy (OM). In the analyses based on thermodynamic calculations, the interaction of the Gibbs free energy of η phase formation and the diffusion activation energy of the elements, especially titanium and niobium, was considered. The microstructural studies showed that increasing the heat treatment time results in increasing the volume fraction of the η phase. By increasing the aging temperature to 840 and 860 °C for conventional A286 superalloy and Nb-A286 superalloy, respectively, the η phase volume fraction increased, however, further increase led to volume fraction decrease. The results of the thermodynamic analyses showed the tip of the TTP diagrams at temperatures of 860 and 820 °C for the A286 and Nb-A286 alloys, respectively. Investigation of kinetics calculations showed that η phase transformation depends on the diffusion of titanium, nickel, and niobium.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90898782","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: 1

Deposition of ultra-black nickel phosphorus coatings 超黑镍磷涂层的沉积

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3552

E. Shcherbina, A. Abrashov, N. Grigoryan, V. Aleshina, T. Vagramyan, V. Men'shikov

引用次数: 0

Investigation of the weldability of AISI304 and AISI1030 steels welded by friction welding AISI304和AISI1030钢摩擦焊可焊性的研究

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.1051/metal/2020058

T. Teker, E. M. Karakurt, Murat Özabaci, Yaşar Güleryüz

引用次数: 1

Hydrogen embrittlement of TRIP steel after previous deformation TRIP钢变形后的氢脆

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3502

P. Váňová, J. Sojka, Mária Melicherová, K. Konečná, Taťána Radkovská

{"title":"Hydrogen embrittlement of TRIP steel after previous deformation","authors":"P. Váňová, J. Sojka, Mária Melicherová, K. Konečná, Taťána Radkovská","doi":"10.37904/metal.2020.3502","DOIUrl":"https://doi.org/10.37904/metal.2020.3502","url":null,"abstract":"The aim of the work was to obtain information about the effect of hydrogen in pre-deformed samples made of TRIP 780 steel and during deformation, when retained austenite transforms into martensite. Electrolytic hydrogenation took place both under the simultaneous action of deformation and before the tensile test itself. After hydrogenation, TRIP steel showed an increase in the yield strength and a decrease in the tensile strength. Elongation at fracture also decreased significantly by more than 20 % compared to samples that were only pre-deformed. The occurrence of deformation-induced martensite in the microstructure of TRIP steels significantly contribute to the susceptibility of these steels to hydrogen embrittlement. For samples with 5% predeformation, the value of the hydrogen embrittlement index was found to be 78.1 %, for samples with 10% predeformation it further increased to 86.2 %. From these results, hydrogen led to a degradation of mechanical properties with increasing percentage of deformation and at the same time the obtained results demonstrate a significant susceptibility of TRIP steels to hydrogen embrittlement. The article also contains results of a fractographic analysis, which also showed the occurrence of typical signs of hydrogen embrittlement, which are a quasi-cleavage fracture and fisheyes.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74203404","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 STUDY OF ANTICORROSIVE COLD SPRAYED Al-Zn COATINGS FOR Nd-Fe-B PERMANENT MAGNETS Nd-Fe-B永磁体防腐冷喷涂铝锌涂层的研究

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3560

I. Belyaev, K. Frolov, A. Stepnov, V. Bazhenov, A. Kireev

引用次数: 0

Laser welding-brazing of alumina to 304 stainless steel with an Ag-based filler material 用ag基填充材料激光钎焊氧化铝至304不锈钢

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.1051/metal/2020086

Yan Zhang, Yankun Chen, Jianping Zhou, Daqian Sun, Hongmei Li

引用次数: 4