Pub Date : 2020-01-01DOI: 10.37904/metal.2020.3501
J. Moravec, Jan Novák, J. Sobotka, I. Nováková
Structural designs of the dynamically loaded welded structures are currently based primarily on the values of the parent base material fatigue life. Although it tries to capture the influence of the given process by using the safety constants of the notch effect both of the weld and the thermal influence, it is only a theoretical estimation. Due to that, it very often results in large oversizing and, in worse cases, in under-sizing of the engineering design. As a result, there is either an overly robust and heavy construction, which is unacceptable (especially when applied in the automotive industry) or on the contrary, there is failure of parts due to cracks earlier than their planned service life is reached. The paper shows the effect of MAG welding method on the fatigue life of fillet and butt welds made of the fine-grained structural steel S460MC. The comparison of such influence is performed via using experimentally determined Wöhler curves of the parent material and both types of welded joints.
{"title":"Influence of the Welding Process on Changes in the S460MC Fine-grained Steel Joints Fatigue life","authors":"J. Moravec, Jan Novák, J. Sobotka, I. Nováková","doi":"10.37904/metal.2020.3501","DOIUrl":"https://doi.org/10.37904/metal.2020.3501","url":null,"abstract":"Structural designs of the dynamically loaded welded structures are currently based primarily on the values of the parent base material fatigue life. Although it tries to capture the influence of the given process by using the safety constants of the notch effect both of the weld and the thermal influence, it is only a theoretical estimation. Due to that, it very often results in large oversizing and, in worse cases, in under-sizing of the engineering design. As a result, there is either an overly robust and heavy construction, which is unacceptable (especially when applied in the automotive industry) or on the contrary, there is failure of parts due to cracks earlier than their planned service life is reached. The paper shows the effect of MAG welding method on the fatigue life of fillet and butt welds made of the fine-grained structural steel S460MC. The comparison of such influence is performed via using experimentally determined Wöhler curves of the parent material and both types of welded joints.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87604210","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: 10.37904/metal.2020.3601
V. Kodetová, M. Vlach, M. Leibner, H. Kudrnová, P. Harcuba, L. Bajtošová, M. Cieslar
In the present work AA7075 alloys with and without Sc, Zr addition after hot deformation were studied. Thermal responses of precipitation reactions of hot deformed alloys were studied by differential scanning calorimetry, the relative electrical resistivity changes were determined by DC four-point method. The interconnections of these two materials characteristics were presented. Thermal and electrical measurements were compared to microstructure development that was observed by scanning and transmission electron microscope. Two types of eutectic phase were proved at (sub)grain boundaries. In the AA7075-Sc,Zr alloy primary multilayer Al3(Sc,Zr) particles precipitated during casting and subsequent cooling. In the thermal curves one exothermic process at ~ 200 °C and the decrease of relative resistivity changes were observed. Apparent activation energy of this process was calculated using by Kissinger method as ~ 100 kJ/mol regardless Sc, Zr addition. Schematic timetemperature-transformation diagram of the exothermic process was done on the base of calorimetric measurements at different heating rates.
{"title":"THERMAL CHARACTERISTICS AND ELECTRICAL PROPERTIES OF HOT DEFORMED AA7075 ALLOYS WITH AND WITHOUT Sc, Zr ADDITIONS","authors":"V. Kodetová, M. Vlach, M. Leibner, H. Kudrnová, P. Harcuba, L. Bajtošová, M. Cieslar","doi":"10.37904/metal.2020.3601","DOIUrl":"https://doi.org/10.37904/metal.2020.3601","url":null,"abstract":"In the present work AA7075 alloys with and without Sc, Zr addition after hot deformation were studied. Thermal responses of precipitation reactions of hot deformed alloys were studied by differential scanning calorimetry, the relative electrical resistivity changes were determined by DC four-point method. The interconnections of these two materials characteristics were presented. Thermal and electrical measurements were compared to microstructure development that was observed by scanning and transmission electron microscope. Two types of eutectic phase were proved at (sub)grain boundaries. In the AA7075-Sc,Zr alloy primary multilayer Al3(Sc,Zr) particles precipitated during casting and subsequent cooling. In the thermal curves one exothermic process at ~ 200 °C and the decrease of relative resistivity changes were observed. Apparent activation energy of this process was calculated using by Kissinger method as ~ 100 kJ/mol regardless Sc, Zr addition. Schematic timetemperature-transformation diagram of the exothermic process was done on the base of calorimetric measurements at different heating rates.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79568092","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: 10.37904/metal.2020.3643
R. Lenort, F. Zapletal, P. Wicher, N. Shmeleva
Sustainable development goals (SDGs) adopted by all United Nations Member States in 2015 provide an opportunity for the metallurgical and mining industry to create value for both their business and society. The aim of the paper is to analyze the SDGs preferences in the metallurgical and mining industry and identify those SDGs that companies from that industry promised to follow. The multi-criteria decision-making method PROMETHEE and the GAIA plane were used as the methodological base for analysis of input data from United Nations Global Compact database. The results show main differences in declared SDGs preferences among Europe, America, Asia, and Africa.
{"title":"Sustainability Development Goals Preferences in Metallurgical and Mining Industry","authors":"R. Lenort, F. Zapletal, P. Wicher, N. Shmeleva","doi":"10.37904/metal.2020.3643","DOIUrl":"https://doi.org/10.37904/metal.2020.3643","url":null,"abstract":"Sustainable development goals (SDGs) adopted by all United Nations Member States in 2015 provide an opportunity for the metallurgical and mining industry to create value for both their business and society. The aim of the paper is to analyze the SDGs preferences in the metallurgical and mining industry and identify those SDGs that companies from that industry promised to follow. The multi-criteria decision-making method PROMETHEE and the GAIA plane were used as the methodological base for analysis of input data from United Nations Global Compact database. The results show main differences in declared SDGs preferences among Europe, America, Asia, and Africa.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83892824","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: 10.37904/metal.2020.3653
E. Kardas
Blast furnace process is the basic process of pig iron production. This kind of device has a very large volume, so every day it produces significant quantities of the products. Therefore, the effectiveness of this device should be tested regularly. It helps to find causes lowering the effectiveness and optimize the production process. The main goal of the paper is the presentation of results of Overall Equipment Effectiveness of blast furnace conducted in one of Polish steelworks and the causes lowering the value of effectiveness. The analysis covers the period of one calendar year.
{"title":"THE application of the OEE method for THE assessment OF BLAST FURNACE EFFECTIVENESS","authors":"E. Kardas","doi":"10.37904/metal.2020.3653","DOIUrl":"https://doi.org/10.37904/metal.2020.3653","url":null,"abstract":"Blast furnace process is the basic process of pig iron production. This kind of device has a very large volume, so every day it produces significant quantities of the products. Therefore, the effectiveness of this device should be tested regularly. It helps to find causes lowering the effectiveness and optimize the production process. The main goal of the paper is the presentation of results of Overall Equipment Effectiveness of blast furnace conducted in one of Polish steelworks and the causes lowering the value of effectiveness. The analysis covers the period of one calendar year.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83906059","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: 10.37904/metal.2020.3582
J. Cais, Klara Caisova
Silumins (Al-Si alloys) are the most used type of aluminum foundry alloys used in the automotive. Their significant expansion is result of unique properties combination. The requirements of current automotive industry bring demands for high mechanical properties of silumins (mostly by high temperature processes, which decrease properties of aluminum alloys). One area of application where silumins replace the Fe based alloys are forms for tires pressing. Working temperature during this casting process is 160-180 °C, but nowadays trends for rubber vulcanization in tires production increase working temperature over 200 °C. Ordinary aluminum alloys lose their mechanical properties at this temperature. The article describes results of research of newly developed alloy applied for tire pressing forms. This research was subsequently widened by heat treatment being applied to this alloy. Both of these material characteristics (chemical composition and heat treatment) preserve its mechanical properties even when being exposed to high temperature processes.
{"title":"newly developed Al-Si based alloy for high temperature processes in automotive","authors":"J. Cais, Klara Caisova","doi":"10.37904/metal.2020.3582","DOIUrl":"https://doi.org/10.37904/metal.2020.3582","url":null,"abstract":"Silumins (Al-Si alloys) are the most used type of aluminum foundry alloys used in the automotive. Their significant expansion is result of unique properties combination. The requirements of current automotive industry bring demands for high mechanical properties of silumins (mostly by high temperature processes, which decrease properties of aluminum alloys). One area of application where silumins replace the Fe based alloys are forms for tires pressing. Working temperature during this casting process is 160-180 °C, but nowadays trends for rubber vulcanization in tires production increase working temperature over 200 °C. Ordinary aluminum alloys lose their mechanical properties at this temperature. The article describes results of research of newly developed alloy applied for tire pressing forms. This research was subsequently widened by heat treatment being applied to this alloy. Both of these material characteristics (chemical composition and heat treatment) preserve its mechanical properties even when being exposed to high temperature processes.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88738698","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: 10.37904/metal.2020.3497
Ivana Schnablová, R. Kopřiva, Ondřej Buršík, K. Rusňáková, A. Materna
Current trend of long-term operation of NPP’s for more than 60 years requires assurance of its safety and reliability. One of the solutions how to extend service life of reactor pressure vessel (RPV) is thermal annealing, which became a verified technology and its application in nuclear industry was prompted mainly due to an inability of RPV exchange. At present time, there is no comparable method for RPV internals that are not monitored by surveillance program and their material is exposed to significantly more intense neutron flux than the RPV. Paper presents the thermal annealing as one of the possible solutions to provide and re-establish sufficient mechanical properties of RPV internals during the operation. According to previously obtained results of unirradiated material, two thermal annealing regimes for irradiated experimental material were selected based on the annealing temperatures of 550 and 600 °C. The possibility of recovery of mechanical properties to the level almost corresponding to the initial state by the thermal annealing was studied by hardness testing and static fracture toughness tests before and after the thermal annealing of irradiated material.
{"title":"THERMAL ANNEALING OF WWER – 440 NUCLEAR REACTOR PRESSURE VESSEL INTERNALS MATERIAL","authors":"Ivana Schnablová, R. Kopřiva, Ondřej Buršík, K. Rusňáková, A. Materna","doi":"10.37904/metal.2020.3497","DOIUrl":"https://doi.org/10.37904/metal.2020.3497","url":null,"abstract":"Current trend of long-term operation of NPP’s for more than 60 years requires assurance of its safety and reliability. One of the solutions how to extend service life of reactor pressure vessel (RPV) is thermal annealing, which became a verified technology and its application in nuclear industry was prompted mainly due to an inability of RPV exchange. At present time, there is no comparable method for RPV internals that are not monitored by surveillance program and their material is exposed to significantly more intense neutron flux than the RPV. Paper presents the thermal annealing as one of the possible solutions to provide and re-establish sufficient mechanical properties of RPV internals during the operation. According to previously obtained results of unirradiated material, two thermal annealing regimes for irradiated experimental material were selected based on the annealing temperatures of 550 and 600 °C. The possibility of recovery of mechanical properties to the level almost corresponding to the initial state by the thermal annealing was studied by hardness testing and static fracture toughness tests before and after the thermal annealing of irradiated material.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85852433","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}
Xiaoxuan Deng, Guoliang Liu, Qiangqiang Wang, Baisong Liu, C. Ji, Haibo Li, Xiao-jing Shao, Guo-sen Zhu
The flow control devices (FCDs) in the tundish play an important role in steel cleanliness and removal of macro-inclusions. To eliminate the spot-like defects during deep-drawing process, the liquid steel samples were taken from tundish in three industrial IF steel heats, and the effect of weir structure in the tundish on the steel cleanliness were evaluated and compared with the aid of ASPEX with the total detection area of over 54 000 mm2 . The results showed that non-metallic inclusions over 5 µm observed in the liquid tundish samples were categorized into two types: type 1: alumina based inclusions and type 2: calcium aluminates. Compared to the tundish without weir, the number density of macro-inclusions reduces by half when furnished with weir. In addition, several large sized calcium aluminates were occasionally found without weir whereas no calcium aluminates were detected with the weir. The mechanism of the inclusion distributions with the weir was proposed based on the experimental results, which shows that the weir act as a baffle that block the large sized inclusions from moving toward the mould. After using the weir in the actual casting practice, the occurrence ratio of spot-like defects was decreased by about 25%.
{"title":"Effect of the weir structure in the tundish on the cleanliness of IF steels and elimination of spot-like defects in deep drawing automobile steel sheets","authors":"Xiaoxuan Deng, Guoliang Liu, Qiangqiang Wang, Baisong Liu, C. Ji, Haibo Li, Xiao-jing Shao, Guo-sen Zhu","doi":"10.1051/metal/2020061","DOIUrl":"https://doi.org/10.1051/metal/2020061","url":null,"abstract":"The flow control devices (FCDs) in the tundish play an important role in steel cleanliness and removal of macro-inclusions. To eliminate the spot-like defects during deep-drawing process, the liquid steel samples were taken from tundish in three industrial IF steel heats, and the effect of weir structure in the tundish on the steel cleanliness were evaluated and compared with the aid of ASPEX with the total detection area of over 54 000 mm2 . The results showed that non-metallic inclusions over 5 µm observed in the liquid tundish samples were categorized into two types: type 1: alumina based inclusions and type 2: calcium aluminates. Compared to the tundish without weir, the number density of macro-inclusions reduces by half when furnished with weir. In addition, several large sized calcium aluminates were occasionally found without weir whereas no calcium aluminates were detected with the weir. The mechanism of the inclusion distributions with the weir was proposed based on the experimental results, which shows that the weir act as a baffle that block the large sized inclusions from moving toward the mould. After using the weir in the actual casting practice, the occurrence ratio of spot-like defects was decreased by about 25%.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"78 1","pages":"609"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84261012","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: 10.37904/metal.2020.3444
R. Bendikiene, A. Ciuplys, R. Česnavičius, V. Grigas, A. Jutas, A. Bahdanovich, D. N. Marmysh, A. Nasan, Liudmila Shemet, S. Sherbakov
This research paper combines investigation of mechanical properties of austempered ductile cast iron (ADI) and comparison with standard grades of steel and cast iron. Due to the special features of both materials – catsability from cast iron, and toughness from steel, ADI attracts an attention of industry and science because of economic benefits and high performance at the different application areas. Austempered ductile iron was tested on tension where unconventional behaviour was observed: with the increase of tensile strength almost to 1600 MPa the metal became less brittle. Hardness test revealed absence of linear relation between strength and hardness, different hardness values ~ 40 HRC or ~ 55 HRC can be reached with the same tensile strength 1000 – 1200 MPa. After successful tensile tests the main direction of further studies was solving relevant practical wear and fatigue problems in rail-wheel system. The complex practical studies demonstrated that ADI is consistent with heat treated steels including the rail steels: required tensile strength of rail steel ranges from 1180 MPa to 1280 MPa when rolling surface hardness is expected to be in the range of 38 HRC – 44 HRC, whereas tensile strength of ADI was higher, up to 1400 MPa, and hardness slightly higher than of steel, 50 HRC. Herewith the workability of frictional couple cast iron/steel 20MnCr5G exceeded work performance of steel/steel system by 14 %. Specific properties emerged from successful ratio of three elements Mo, Ni, and Cu, and properly chosen austenitization schedule.
{"title":"STUDY OF AUSTEMPERED DUCTILE CAST IRON ENRICHED BY PARTICULAR RATIO OF Nickel, mOLYBDENUM AND COPPER","authors":"R. Bendikiene, A. Ciuplys, R. Česnavičius, V. Grigas, A. Jutas, A. Bahdanovich, D. N. Marmysh, A. Nasan, Liudmila Shemet, S. Sherbakov","doi":"10.37904/metal.2020.3444","DOIUrl":"https://doi.org/10.37904/metal.2020.3444","url":null,"abstract":"This research paper combines investigation of mechanical properties of austempered ductile cast iron (ADI) and comparison with standard grades of steel and cast iron. Due to the special features of both materials – catsability from cast iron, and toughness from steel, ADI attracts an attention of industry and science because of economic benefits and high performance at the different application areas. Austempered ductile iron was tested on tension where unconventional behaviour was observed: with the increase of tensile strength almost to 1600 MPa the metal became less brittle. Hardness test revealed absence of linear relation between strength and hardness, different hardness values ~ 40 HRC or ~ 55 HRC can be reached with the same tensile strength 1000 – 1200 MPa. After successful tensile tests the main direction of further studies was solving relevant practical wear and fatigue problems in rail-wheel system. The complex practical studies demonstrated that ADI is consistent with heat treated steels including the rail steels: required tensile strength of rail steel ranges from 1180 MPa to 1280 MPa when rolling surface hardness is expected to be in the range of 38 HRC – 44 HRC, whereas tensile strength of ADI was higher, up to 1400 MPa, and hardness slightly higher than of steel, 50 HRC. Herewith the workability of frictional couple cast iron/steel 20MnCr5G exceeded work performance of steel/steel system by 14 %. Specific properties emerged from successful ratio of three elements Mo, Ni, and Cu, and properly chosen austenitization schedule.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84328182","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: 10.37904/metal.2020.3543
B. Eremiáš, L. Mindos, L. Turek
The possible effects on the protective performance of ZRP modified by combination of Zn dust with aluminium or carbon type fillers were investigated using electrochemical noise analysis (ENA). The role of different oxygen diffusion characteristics (identified on tested coating systems with ENA) on delamination tendency was tested during 168 hrs immersion tests in 0.05 M NaCl. It was shown the protective performance of tested type of coating systems can be changing with immersion time rather differently in relation to different ability of polymer matrix with the Zn/Al or Zn/C particles combination for oxygen transport to the coating/steel interface.
利用电化学噪声分析(ENA)研究了锌粉与铝或碳型填料复合改性ZRP对其防护性能可能产生的影响。在0.05 M NaCl中浸泡168小时，测试了不同的氧扩散特性(在测试的ENA涂层体系中确定)对分层倾向的影响。结果表明，不同类型的聚合物基体与Zn/Al或Zn/C颗粒组合向涂层/钢界面输送氧的能力不同，其防护性能随浸泡时间的变化有较大差异。
{"title":"THE APPLICATION OF ENA FOR COMPARISON OF PROTECTIVE PERFORMANCE OF ZRP MODIFIED BY COMBINATION OF Zn DUST WITH ALUMINIUM OR CARBON TYPE FILLERS","authors":"B. Eremiáš, L. Mindos, L. Turek","doi":"10.37904/metal.2020.3543","DOIUrl":"https://doi.org/10.37904/metal.2020.3543","url":null,"abstract":"The possible effects on the protective performance of ZRP modified by combination of Zn dust with aluminium or carbon type fillers were investigated using electrochemical noise analysis (ENA). The role of different oxygen diffusion characteristics (identified on tested coating systems with ENA) on delamination tendency was tested during 168 hrs immersion tests in 0.05 M NaCl. It was shown the protective performance of tested type of coating systems can be changing with immersion time rather differently in relation to different ability of polymer matrix with the Zn/Al or Zn/C particles combination for oxygen transport to the coating/steel interface.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86888255","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: 10.37904/metal.2020.3659
D. Klimecka-Tatar
Titanium, invariably for decades, is the most promising metallic material used in medicine (implantology). And its suitability is primarily determined by biotolerance, which depends on the preparation of the surface of the elements. This paper assesses the quality control of oxide layers produced on pure (medical) titanium in the process of thermal oxidation in an air atmosphere. The parameters characterizing surface roughness have been used as control parameters. It was noted that the titanium surface undergoes a slight change with short oxidation times, and the oxidation is relatively even in nature. However, with longer oxidation times (more than 45 minutes) roughness parameters change drastically, which is not always beneficial from the point of view of further use.
{"title":"QUality CONTROL BASE ON surface roughness CHARACTERISTIC – OXIDE layer on PURE titanium","authors":"D. Klimecka-Tatar","doi":"10.37904/metal.2020.3659","DOIUrl":"https://doi.org/10.37904/metal.2020.3659","url":null,"abstract":"Titanium, invariably for decades, is the most promising metallic material used in medicine (implantology). And its suitability is primarily determined by biotolerance, which depends on the preparation of the surface of the elements. This paper assesses the quality control of oxide layers produced on pure (medical) titanium in the process of thermal oxidation in an air atmosphere. The parameters characterizing surface roughness have been used as control parameters. It was noted that the titanium surface undergoes a slight change with short oxidation times, and the oxidation is relatively even in nature. However, with longer oxidation times (more than 45 minutes) roughness parameters change drastically, which is not always beneficial from the point of view of further use.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86462855","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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