Pub Date : 2016-01-01DOI: 10.7494/MAFE.2016.42.2.87
K. Ziewiec, M. Wojciechowska, M. Jasiński, D. Mucha, M. Lis
The aim of this work is to study the possibility of obtaining an amorphous-crystalline composite starting from Ni-Si-B-based powder grade 1559-40 and silver powder. The process of plasma spray deposition was performed on a water-cooled copper substrate. The cooling rate was assessed using a mid-wave infrared MWIR camera. The microstructure of the deposit was studied using scanning electron microscope SEM with an energy dispersive spectrometer EDS. Phase identification was performed using X-ray diffraction XRD. The studies confirmed an amorphous-crystalline microstructure of the deposits. The predominant constituent of the microstructure was amorphous regions enriched in Ni, Si, and B, while the other constituent was Ag-rich crystalline inclusions identified as a face-centered cubic fcc.
本工作的目的是研究从ni - si -b基1559-40粉末和银粉开始获得非晶复合材料的可能性。在水冷铜衬底上进行了等离子喷涂沉积。使用中波红外MWIR相机评估冷却速率。利用扫描电子显微镜(SEM)和能谱仪(EDS)对镀层的微观结构进行了研究。采用x射线衍射XRD进行物相鉴别。研究证实了矿床的非晶微观结构。微观结构的主要成分是富含Ni、Si和B的无定形区，而另一个成分是富含ag的晶体包裹体，被鉴定为面心立方fcc。
{"title":"Microstructure and phase composition of the Ni-Si-B-Ag-based plasma spray deposit","authors":"K. Ziewiec, M. Wojciechowska, M. Jasiński, D. Mucha, M. Lis","doi":"10.7494/MAFE.2016.42.2.87","DOIUrl":"https://doi.org/10.7494/MAFE.2016.42.2.87","url":null,"abstract":"The aim of this work is to study the possibility of obtaining an amorphous-crystalline composite starting from Ni-Si-B-based powder grade 1559-40 and silver powder. The process of plasma spray deposition was performed on a water-cooled copper substrate. The cooling rate was assessed using a mid-wave infrared MWIR camera. The microstructure of the deposit was studied using scanning electron microscope SEM with an energy dispersive spectrometer EDS. Phase identification was performed using X-ray diffraction XRD. The studies confirmed an amorphous-crystalline microstructure of the deposits. The predominant constituent of the microstructure was amorphous regions enriched in Ni, Si, and B, while the other constituent was Ag-rich crystalline inclusions identified as a face-centered cubic fcc.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"56 1","pages":"87"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75370639","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 : 2016-01-01DOI: 10.7494/MAFE.2016.42.2.105
K. Mroczka, A. Pietras, J. Jura
Aluminum alloys 2017A and AlSi9Mg (hypo-eutectic silumin) were friction stir welded with a relatively high linear velocity (over 1 m/min) and use of an additional heat source from the root side of the weld. Macrostructure investigation (with high-resolution images) showed no effect of heating on weld quality. The welding process caused significant fragmentation of the secondary phases in the AlSi9Mg alloy. Furthermore, it was proven that the material above the weld nugget was not mixed and contained micro-defects that were not caused by welding. Also, it contained cavities on the boundaries between Si-particles and the matrix. Based on hardness distribution, a slight strengthening of the cast alloy was observed at the bottom and middle parts of the weld. However, the hardness of the 2017A alloy initially decreased and then increased due to natural aging. This means that the FSW process produced a metastable state in the alloy.
{"title":"FEATURES OF 2017A AND AlSi9Mg ALUMINUM ALLOYS FRICTION STIR WELDED WITH ROOT-SIDE HEATING","authors":"K. Mroczka, A. Pietras, J. Jura","doi":"10.7494/MAFE.2016.42.2.105","DOIUrl":"https://doi.org/10.7494/MAFE.2016.42.2.105","url":null,"abstract":"Aluminum alloys 2017A and AlSi9Mg (hypo-eutectic silumin) were friction stir welded with a relatively high linear velocity (over 1 m/min) and use of an additional heat source from the root side of the weld. Macrostructure investigation (with high-resolution images) showed no effect of heating on weld quality. The welding process caused significant fragmentation of the secondary phases in the AlSi9Mg alloy. Furthermore, it was proven that the material above the weld nugget was not mixed and contained micro-defects that were not caused by welding. Also, it contained cavities on the boundaries between Si-particles and the matrix. Based on hardness distribution, a slight strengthening of the cast alloy was observed at the bottom and middle parts of the weld. However, the hardness of the 2017A alloy initially decreased and then increased due to natural aging. This means that the FSW process produced a metastable state in the alloy.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"42 1","pages":"105"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74398632","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 : 2016-01-01DOI: 10.7494/MAFE.2016.42.3.187
M. Jędrusik, Aleksandra J Debowska, A. Kopia, P. Petrzak, D. Koclęga, I. Kalemba-Rec
Aluminium and aluminium alloys are now widely used as materials for structural applications due to a number of valuable properties. Improvement in functional and decorative properties of aluminium can be obtained by forming an oxide layer on its surface. The aim of the present study was to produce and compare the properties of oxide layers on the surface of aluminium alloy 7075 and compare their properties. Methods which were used during the study were as follows: phosphating, micro-arc oxidation, and a chemical method involving the formation of the passive layer. Layers were subjected to corrosion tests. SEM and EDS methods were used for characterization of received results. Also some tests on optical ptofilometer were done. It was proven that the micro-arc oxidation method allows for obtaining a layer with the greatest thickness and highest corrosion resistance.
{"title":"CHARACTERIZATION OF OXIDE LAYERS MADE ON ALUMINUM ALLOY 7075 BY DIFFERENT METHODS","authors":"M. Jędrusik, Aleksandra J Debowska, A. Kopia, P. Petrzak, D. Koclęga, I. Kalemba-Rec","doi":"10.7494/MAFE.2016.42.3.187","DOIUrl":"https://doi.org/10.7494/MAFE.2016.42.3.187","url":null,"abstract":"Aluminium and aluminium alloys are now widely used as materials for structural applications due to a number of valuable properties. Improvement in functional and decorative properties of aluminium can be obtained by forming an oxide layer on its surface. The aim of the present study was to produce and compare the properties of oxide layers on the surface of aluminium alloy 7075 and compare their properties. Methods which were used during the study were as follows: phosphating, micro-arc oxidation, and a chemical method involving the formation of the passive layer. Layers were subjected to corrosion tests. SEM and EDS methods were used for characterization of received results. Also some tests on optical ptofilometer were done. It was proven that the micro-arc oxidation method allows for obtaining a layer with the greatest thickness and highest corrosion resistance.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"53 1","pages":"187"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74379785","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 : 2016-01-01DOI: 10.7494/MAFE.2016.42.3.179
Ł. Wzorek, M. Wiewióra, M. Wędrychowicz, T. Skrzekut, P. Noga, J. Wiewióra, W. Sajdak, M. Richert
Rapid solidification is a relatively new and effective way of ultrafine grained UFG aluminum alloys production with enhanced mechanical properties. Due to significant cooling rate close to almost 10 6 K/s it is possible to obtain material with grain size far below 100 nm. In the present study RS aluminum alloys with Si content in a range of 5-10 wt.% were produced during melt spinning. As a result, materials in a form of ribbons were produced. As-received flakes were subjected to cold pressing into a cylindrical billets with diameter of 40 mm. Hot extrusion of pre-compacted material was subsequently performed at the temperature of 450 °C with press ram speed of 3 mm/s and extrusion ratio of λ=25. In this work influence of brittle phases on mechanical properties of as-extruded rods will be examined. Both tensile and microhardness tests were performed in order to determine mechanical properties of obtained profiles. It has been showed that brittle phases refinement during melt spinning significantly influences mechanical properties of tested materials.
{"title":"Effect of rapid solidification aluminum alloys with different Si content on mechanical properties and microstructure","authors":"Ł. Wzorek, M. Wiewióra, M. Wędrychowicz, T. Skrzekut, P. Noga, J. Wiewióra, W. Sajdak, M. Richert","doi":"10.7494/MAFE.2016.42.3.179","DOIUrl":"https://doi.org/10.7494/MAFE.2016.42.3.179","url":null,"abstract":"Rapid solidification is a relatively new and effective way of ultrafine grained UFG aluminum alloys production with enhanced mechanical properties. Due to significant cooling rate close to almost 10 6 K/s it is possible to obtain material with grain size far below 100 nm. In the present study RS aluminum alloys with Si content in a range of 5-10 wt.% were produced during melt spinning. As a result, materials in a form of ribbons were produced. As-received flakes were subjected to cold pressing into a cylindrical billets with diameter of 40 mm. Hot extrusion of pre-compacted material was subsequently performed at the temperature of 450 °C with press ram speed of 3 mm/s and extrusion ratio of λ=25. In this work influence of brittle phases on mechanical properties of as-extruded rods will be examined. Both tensile and microhardness tests were performed in order to determine mechanical properties of obtained profiles. It has been showed that brittle phases refinement during melt spinning significantly influences mechanical properties of tested materials.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"47 1","pages":"179"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83232086","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 : 2016-01-01DOI: 10.7494/mafe.2016.42.4.225
A. Ziewiec, A. Zielińska-Lipiec, M. Witkowska
This paper presents the results of determining the effect of heat treatment after welding X8CrNiMoAl15-7-2 steel (commercial name: PH 15-7Mo steel) on the microstructure and texture of the welds. XRD studies showed the presence of the two phases in the welds of 15-7Mo steel; i.e., δ ferrite and austenite. Annealing at a temperature of 400°C/1 h and 550°C/1 h results in changes of the intensities for individual peaks derived from austenite and ferrite. Microstructure investigations carried out by LM and TEM indicated that the austenite and δ ferrite coexist in the microstructure of 15-7Mo steel in as-welded condition. Annealing at a temperature range of between 400–620°C after welding causes small changes in the microstructure. The hardness of the welds after annealing in that temperature range increases.
{"title":"MICROSTRUCTURE AND TEXTURE WELDS OF 15-7Mo STEEL AFTER HEAT TREATMENT","authors":"A. Ziewiec, A. Zielińska-Lipiec, M. Witkowska","doi":"10.7494/mafe.2016.42.4.225","DOIUrl":"https://doi.org/10.7494/mafe.2016.42.4.225","url":null,"abstract":"This paper presents the results of determining the effect of heat treatment after welding X8CrNiMoAl15-7-2 steel (commercial name: PH 15-7Mo steel) on the microstructure and texture of the welds. XRD studies showed the presence of the two phases in the welds of 15-7Mo steel; i.e., δ ferrite and austenite. Annealing at a temperature of 400°C/1 h and 550°C/1 h results in changes of the intensities for individual peaks derived from austenite and ferrite. Microstructure investigations carried out by LM and TEM indicated that the austenite and δ ferrite coexist in the microstructure of 15-7Mo steel in as-welded condition. Annealing at a temperature range of between 400–620°C after welding causes small changes in the microstructure. The hardness of the welds after annealing in that temperature range increases.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"25 1","pages":"225"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75134169","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 : 2016-01-01DOI: 10.7494/MAFE.2016.42.3.171
Ż. Kurleto-Kozioł, B. Grabowska
The results of spectral research (IR, UV-Vis) of activation process of calcium montmorillonite Ca-MMT by sodium cations are presented in this article. Modifications Ca-MMT were carried out by modifier in the form of sodium carbonate by keeping different times of activations. On the base of received sodium modifiers MMT (Na-MMT) analytical cycle of research was done, including structural (IR) and spectrophotometric (UV-Vis) researches, in order for designation of ions exchange ability (CEC). There was observed that the method of processing modification (changing activation time) does not affect on ion exchange ability Na-MMT. Application of modified MMT used as a binding material in greensand will be described in next part of planned researches.
{"title":"Study on the activation of calcium montmorillonite (Ca-MMT) by sodium cations","authors":"Ż. Kurleto-Kozioł, B. Grabowska","doi":"10.7494/MAFE.2016.42.3.171","DOIUrl":"https://doi.org/10.7494/MAFE.2016.42.3.171","url":null,"abstract":"The results of spectral research (IR, UV-Vis) of activation process of calcium montmorillonite Ca-MMT by sodium cations are presented in this article. Modifications Ca-MMT were carried out by modifier in the form of sodium carbonate by keeping different times of activations. On the base of received sodium modifiers MMT (Na-MMT) analytical cycle of research was done, including structural (IR) and spectrophotometric (UV-Vis) researches, in order for designation of ions exchange ability (CEC). There was observed that the method of processing modification (changing activation time) does not affect on ion exchange ability Na-MMT. Application of modified MMT used as a binding material in greensand will be described in next part of planned researches.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"14 1","pages":"171"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85918810","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 : 2016-01-01DOI: 10.7494/MAFE.2016.42.2.117
Ł. Wzorek, M. Wędrychowicz, T. Skrzekut, P. Noga, M. Wiewióra, J. Wiewióra, W. Sajdak, M. Richert
In the present work, the optimal conditions for solid bonding of fragmented aluminum alloy were determined. The research was conducted on metal chips from the AlSi11 TM aluminum alloy after the turning process. The selection of proper bonding conditions was based on the results of tensile tests and surface quality analysis of as-extruded profiles. The extrusion process was conducted within a temperature range of 350–500°C, with a ram speed of 13 mm/s. Extrusion ratio λ was 25. As a reference material, a sample from the solid AlSi11IM alloy has been extruded under the same conditions. The influence of temperature during direct extrusion on both maximum force and surface quality of obtained profiles has been determined. With reference to tensile test results, no significant influence of temperature on the mechanical properties has been noticed. Profiles extruded at 500°C were characterized by visible cracks on the surface, oriented perpendicular in the direction of extrusion. Moreover, surface flaws were also noticed in profiles extruded at 350°C. A tensile testrevealed a strong relationship between the extrusion conditions and plasticity of solid bonded rods. A shiny and smooth surface was obtained only in profiles extruded at a temperature range of 400–450°C. Selection of optimal conditions for solid bonding of the AlSi11 aluminium alloy Normal 0 21 false false false PL X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Standardowy; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0cm; line-height:107%; mso-pagination:widow-orphan; font-size:10.0pt; mso-bidi-font-size:12.0pt; font-family:"Verdana",sans-serif; mso-fareast-language:EN-US;}
{"title":"SELECTION OF OPTIMAL CONDITIONS FOR SOLID BONDING OF THE AlSi11 ALUMINIUM ALLOY","authors":"Ł. Wzorek, M. Wędrychowicz, T. Skrzekut, P. Noga, M. Wiewióra, J. Wiewióra, W. Sajdak, M. Richert","doi":"10.7494/MAFE.2016.42.2.117","DOIUrl":"https://doi.org/10.7494/MAFE.2016.42.2.117","url":null,"abstract":"In the present work, the optimal conditions for solid bonding of fragmented aluminum alloy were determined. The research was conducted on metal chips from the AlSi11 TM aluminum alloy after the turning process. The selection of proper bonding conditions was based on the results of tensile tests and surface quality analysis of as-extruded profiles. The extrusion process was conducted within a temperature range of 350–500°C, with a ram speed of 13 mm/s. Extrusion ratio λ was 25. As a reference material, a sample from the solid AlSi11IM alloy has been extruded under the same conditions. The influence of temperature during direct extrusion on both maximum force and surface quality of obtained profiles has been determined. With reference to tensile test results, no significant influence of temperature on the mechanical properties has been noticed. Profiles extruded at 500°C were characterized by visible cracks on the surface, oriented perpendicular in the direction of extrusion. Moreover, surface flaws were also noticed in profiles extruded at 350°C. A tensile testrevealed a strong relationship between the extrusion conditions and plasticity of solid bonded rods. A shiny and smooth surface was obtained only in profiles extruded at a temperature range of 400–450°C. Selection of optimal conditions for solid bonding of the AlSi11 aluminium alloy Normal 0 21 false false false PL X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Standardowy; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0cm; line-height:107%; mso-pagination:widow-orphan; font-size:10.0pt; mso-bidi-font-size:12.0pt; font-family:\"Verdana\",sans-serif; mso-fareast-language:EN-US;}","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"110 1","pages":"117"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75293850","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 : 2016-01-01DOI: 10.7494/MAFE.2016.42.2.95
I. Nejman, M. Richert, P. Zawadzka
The results of our research on the application of coatings for protecting industrial casting molds are presented. Tests were carried out on graphite molds with deposited Al2O3 coatings containing the addition of glassy carbon and with W/Zr/DLC coatings, both examined after the process of pouring molds with molten aluminum bronze. The coatings were applied by two different methods; i.e., plasma spraying in the case of Al2O3 + glassy carbon coating and PVD in the case of W/Zr/DLC coating. Reference tests were also conducted on graphite molds without coating. The use of protective coatings on graphite molds seems to be an effective solution. Studies have shown that coatings have good resistance during the casting process. The liquid metal sticking to the surface did not penetrate deep inside the graphite mold. The use of coating technology reduces the amount of downtime necessary to replace worn molds and increases the efficiency of the casting process. Application of coatings made by plasma spray and PVD methods for protection of graphite moulds Normal 0 21 false false false PL X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Standardowy; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0cm; line-height:107%; mso-pagination:widow-orphan; font-size:10.0pt; mso-bidi-font-size:12.0pt; font-family:"Verdana",sans-serif; mso-fareast-language:EN-US;}
{"title":"APPLICATION OF COATINGS MADE BY PLASMA SPRAY AND PVD METHODS FOR PROTECTION OF GRAPHITE MOULDS","authors":"I. Nejman, M. Richert, P. Zawadzka","doi":"10.7494/MAFE.2016.42.2.95","DOIUrl":"https://doi.org/10.7494/MAFE.2016.42.2.95","url":null,"abstract":"The results of our research on the application of coatings for protecting industrial casting molds are presented. Tests were carried out on graphite molds with deposited Al2O3 coatings containing the addition of glassy carbon and with W/Zr/DLC coatings, both examined after the process of pouring molds with molten aluminum bronze. The coatings were applied by two different methods; i.e., plasma spraying in the case of Al2O3 + glassy carbon coating and PVD in the case of W/Zr/DLC coating. Reference tests were also conducted on graphite molds without coating. The use of protective coatings on graphite molds seems to be an effective solution. Studies have shown that coatings have good resistance during the casting process. The liquid metal sticking to the surface did not penetrate deep inside the graphite mold. The use of coating technology reduces the amount of downtime necessary to replace worn molds and increases the efficiency of the casting process. Application of coatings made by plasma spray and PVD methods for protection of graphite moulds Normal 0 21 false false false PL X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Standardowy; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0cm; line-height:107%; mso-pagination:widow-orphan; font-size:10.0pt; mso-bidi-font-size:12.0pt; font-family:\"Verdana\",sans-serif; mso-fareast-language:EN-US;}","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"11 1","pages":"95"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88944604","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 : 2016-01-01DOI: 10.7494/mafe.2016.42.4.233
L. Tuz
This paper presents the results of a microstructure analysis of a laser butt-welded 600 nickel alloy. A microstructure evaluation of the joint is carried out with the use of light microscopy and scanning electron microscopy. The results indicate a phase γ with some particles in the grain boundaries in the base metal. In the weld, a cellular-dendritic structure was observed.
{"title":"MICROSTRUCTURE EVALUATION OF LASER-WELDED 600 NICKEL ALLOY","authors":"L. Tuz","doi":"10.7494/mafe.2016.42.4.233","DOIUrl":"https://doi.org/10.7494/mafe.2016.42.4.233","url":null,"abstract":"This paper presents the results of a microstructure analysis of a laser butt-welded 600 nickel alloy. A microstructure evaluation of the joint is carried out with the use of light microscopy and scanning electron microscopy. The results indicate a phase γ with some particles in the grain boundaries in the base metal. In the weld, a cellular-dendritic structure was observed.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"30 9","pages":"233"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91420965","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 : 2016-01-01DOI: 10.7494/mafe.2016.42.4.213
D. Koclęga, A. Radziszewska, S. Kąc, W. Zowczak, Aleksandra J Debowska, M. Jędrusik, P. Petrzak
This work presents the laser welding of dissimilar X12CrCoWVNbN12-2-2 and X10CrNi18-10 steels. This system is of interest, as laser welding offers new flexibility in the joining of metals and laser welds (LWs) and are usually of high quality; they are obtained only after the optimization of process parameters. The aim of the work was to investigate the microstructure, chemical composition, and hardness changes of laser-welded steels. After laser welding, two zones were generated in the processed materials: a fusion zone and a heat-affected zone. Due to solidification, a refinement of the microstructure occurred in the fusion zone. Examinations of the chemical composition of particular melted areas showed the occurrence of Nb-rich precipitations. The laser welding of steels led to increased hardness in the fusion zone (about 240–530 HV0.3).
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