Stir casting is an economical method to produce aluminum matrix composites. In the present work, composites of aluminum alloy AA6061 reinforced with various amounts (0, 5, 10 and 15 wt.%) of TiC particles were prepared by stir casting technique. X-ray diffraction patterns of the prepared composites clearly revealed the incorporation of TiC particles without the presence of any other compounds. The microstructures of the composites were studied using optical and scanning electron microscopy. It was observed that the TiC particles distributed all over the composite and properly bonded to the matrix alloy. Local clusters of TiC particles were also seen in a few places. The result shows that the reinforcement of TiC particles enhances the microhardness, ultimate tensile strength and wear resistance of the composite. The details of fracture morphology, worn surface, and wear debris are also presented in this paper. K e y w o r d s: metal matrix composites, stir casting, microstructure, mechanical properties
{"title":"Production and characterization of titanium carbide particulate reinforced AA6061 aluminum alloy composites using stir casting","authors":"J. Moses, I. Dinaharan, S. Sekhar","doi":"10.4149/KM_2016_3_257","DOIUrl":"https://doi.org/10.4149/KM_2016_3_257","url":null,"abstract":"Stir casting is an economical method to produce aluminum matrix composites. In the present work, composites of aluminum alloy AA6061 reinforced with various amounts (0, 5, 10 and 15 wt.%) of TiC particles were prepared by stir casting technique. X-ray diffraction patterns of the prepared composites clearly revealed the incorporation of TiC particles without the presence of any other compounds. The microstructures of the composites were studied using optical and scanning electron microscopy. It was observed that the TiC particles distributed all over the composite and properly bonded to the matrix alloy. Local clusters of TiC particles were also seen in a few places. The result shows that the reinforcement of TiC particles enhances the microhardness, ultimate tensile strength and wear resistance of the composite. The details of fracture morphology, worn surface, and wear debris are also presented in this paper. K e y w o r d s: metal matrix composites, stir casting, microstructure, mechanical properties","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82083511","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}
In this paper thermal oxidation and electrochemical anodizing processes were used to produce titanium oxide films on titanium alloy and to examine the effects of oxidation on mechanical and corrosion properties. The surface morphology oxide films, thickness and chemical composition of the surfaces were evaluated using scanning electron microscopy and energy dispersive spectroscopy. The microhardness of titanium oxide films prepared at different experimental conditions is maintained between 8, 2 GPa and 9, 6 GPa, measured by ultra micro hardness tester. The microhardness increased with temperature and voltage. The values of roughness parameters Rz, Rt and Ra indicate a somewhat less roughness of the anodized samples. The values of the roughness parameter Rk are nearly identical for both groups of samples. The cyclic polarization tests showed that none of the tested samples were susceptible to localized corrosion. The oxide films produced by anodic oxidation on titanium alloy showed a higher corrosion resistance than the ones produced by thermal oxidation.
{"title":"Influence of thermal and electrochemical oxidation on the mechanical and corrosion properties of titanium alloy","authors":"V. Alar, Ž. Alar, S. Jakovljević, B. Runje","doi":"10.4149/km_2013_4_251","DOIUrl":"https://doi.org/10.4149/km_2013_4_251","url":null,"abstract":"In this paper thermal oxidation and electrochemical anodizing processes were used to produce titanium oxide films on titanium alloy and to examine the effects of oxidation on mechanical and corrosion properties. The surface morphology oxide films, thickness and chemical composition of the surfaces were evaluated using scanning electron microscopy and energy dispersive spectroscopy. The microhardness of titanium oxide films prepared at different experimental conditions is maintained between 8, 2 GPa and 9, 6 GPa, measured by ultra micro hardness tester. The microhardness increased with temperature and voltage. The values of roughness parameters Rz, Rt and Ra indicate a somewhat less roughness of the anodized samples. The values of the roughness parameter Rk are nearly identical for both groups of samples. The cyclic polarization tests showed that none of the tested samples were susceptible to localized corrosion. The oxide films produced by anodic oxidation on titanium alloy showed a higher corrosion resistance than the ones produced by thermal oxidation.","PeriodicalId":18519,"journal":{"name":"Metallic Materials","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":"84420872","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}
B. Radović, V. Cvetković, R. A. Edwards, J. Jovićević
{"title":"Al-Cu alloy formation by aluminium underpotential deposition from AlCl3+NaCl melts on copper substrate","authors":"B. Radović, V. Cvetković, R. A. Edwards, J. Jovićević","doi":"10.4149/km_2010_3_159","DOIUrl":"https://doi.org/10.4149/km_2010_3_159","url":null,"abstract":"","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87347254","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}
{"title":"Observations on the intersection between {1011} and {1012} twin in deformed magnesium alloy","authors":"G. Xi, J. Zhang, J. Wu, J. Jia, Y. Zhi","doi":"10.4149/km_2021_4_231","DOIUrl":"https://doi.org/10.4149/km_2021_4_231","url":null,"abstract":"","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79174975","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}
S. Liu, Y. Sima, L. Zhang, J. Zhang, W. Qiao, Q. Yuan
{"title":"Study on the mechanical properties, wear resistance and microstructure of nano-SiCp/ZA38 composite material under the synergistic effects of thermal-force-acoustic field","authors":"S. Liu, Y. Sima, L. Zhang, J. Zhang, W. Qiao, Q. Yuan","doi":"10.4149/km_2021_5_303","DOIUrl":"https://doi.org/10.4149/km_2021_5_303","url":null,"abstract":"","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"205 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77750128","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}
{"title":"Effect of solidification parameters on microsegregation behaviour of main alloying elements in a peritectic TiAl based alloy","authors":"A. Klimová, J. Lapin, T. Pelachová, M. Nosko","doi":"10.4149/km_2013_2_89","DOIUrl":"https://doi.org/10.4149/km_2013_2_89","url":null,"abstract":"","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"19 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89445854","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}
This paper aims to investigate the abrasive wear behavior of the sol-gel coated B4C particulate reinforced aluminum metal matrix composite. Sliding wear is related to asperity-to-asperity contact of two counter surfaces, which are in relative motion against each other. The effective wear from the specimen surface is due to the combined effect of a number of factors. An increase in the applied load leads to increase in penetration of hard asperities of the counter surface to the softer pin surface, increase in micro cracking tendency of the subsurface and also increase in the deformation and fracture of asperities of the softer surface. In general, composites offer superior wear resistance as compared to the alloy irrespective of applied load and B4C particles volume fraction. This is primarily due to the presence of the hard dispersoid which protects the matrix from severe contact with the counter surfaces, and thus results in less wear, lower coefficient friction and temperature rise in composite as compared to that in the alloy. The worn surfaces of all specimens were covered with grooves parallel to the sliding direction and some plastic deformations. These grooves are typical features associated with abrasive wear, in which hard asperities on the steel counter face or hard particles between the pin and disc, plough or cut into the pin cause wear by the removal of the material. Plastic deformation, material smearing, cavities and craters imply adhesive wear. K e y w o r d s: dry sliding, adhesive, mechanically mixed layer
{"title":"Investigating the effect of reinforcing particulates on the weight loss and worn surface of compocast AMCs","authors":"A. Mazahery, M. Shabani","doi":"10.4149/km_2013_1_11","DOIUrl":"https://doi.org/10.4149/km_2013_1_11","url":null,"abstract":"This paper aims to investigate the abrasive wear behavior of the sol-gel coated B4C particulate reinforced aluminum metal matrix composite. Sliding wear is related to asperity-to-asperity contact of two counter surfaces, which are in relative motion against each other. The effective wear from the specimen surface is due to the combined effect of a number of factors. An increase in the applied load leads to increase in penetration of hard asperities of the counter surface to the softer pin surface, increase in micro cracking tendency of the subsurface and also increase in the deformation and fracture of asperities of the softer surface. In general, composites offer superior wear resistance as compared to the alloy irrespective of applied load and B4C particles volume fraction. This is primarily due to the presence of the hard dispersoid which protects the matrix from severe contact with the counter surfaces, and thus results in less wear, lower coefficient friction and temperature rise in composite as compared to that in the alloy. The worn surfaces of all specimens were covered with grooves parallel to the sliding direction and some plastic deformations. These grooves are typical features associated with abrasive wear, in which hard asperities on the steel counter face or hard particles between the pin and disc, plough or cut into the pin cause wear by the removal of the material. Plastic deformation, material smearing, cavities and craters imply adhesive wear. K e y w o r d s: dry sliding, adhesive, mechanically mixed layer","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72977336","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}
A. Ehsani, H. M. Shiri, M. G. Mahjani, R. Moshrefi, R. Safari
1-(2,4-Dimethylphenyl)-5-amino-1H-tetrazole (DAT) nanoparticles were synthesized, and its inhibiting action on the corrosion of Aluminum AA1005 alloy (Al) in sulfuric acid was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Inhibition efficiency increases as inhibitor concentration increases. A good correlation was observed between the potentiodynamic studies and electrochemical impedance spectroscopy with electrochemical noise measurements. Hence, it seems that the electrochemical noise (EN) method can be applied as a complementary quantitative technique to study the corrosion behavior of inhibitors. The effect of inhibitor concentration on the interpretation of noise resistance and spectral noise impedance was evaluated. Furthermore, quantum chemical calculations were employed to provide further insight into the mechanism of inhibition by DAT. It was shown that the adsorption of inhibitors on the AA1005 surface takes place through both physical and chemical adsorption. The best fit to the experimental data was obtained using Langmuir adsorption isotherm. K e y w o r d s: aluminum, polarization, impedance, electrochemical noise, adsorption, nanostructure
{"title":"Inhibitory effect of new azole derivative in the corrosion of aluminum in acidic medium: common electrochemical and electrochemical noise investigation","authors":"A. Ehsani, H. M. Shiri, M. G. Mahjani, R. Moshrefi, R. Safari","doi":"10.4149/KM_2016_3_233","DOIUrl":"https://doi.org/10.4149/KM_2016_3_233","url":null,"abstract":"1-(2,4-Dimethylphenyl)-5-amino-1H-tetrazole (DAT) nanoparticles were synthesized, and its inhibiting action on the corrosion of Aluminum AA1005 alloy (Al) in sulfuric acid was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Inhibition efficiency increases as inhibitor concentration increases. A good correlation was observed between the potentiodynamic studies and electrochemical impedance spectroscopy with electrochemical noise measurements. Hence, it seems that the electrochemical noise (EN) method can be applied as a complementary quantitative technique to study the corrosion behavior of inhibitors. The effect of inhibitor concentration on the interpretation of noise resistance and spectral noise impedance was evaluated. Furthermore, quantum chemical calculations were employed to provide further insight into the mechanism of inhibition by DAT. It was shown that the adsorption of inhibitors on the AA1005 surface takes place through both physical and chemical adsorption. The best fit to the experimental data was obtained using Langmuir adsorption isotherm. K e y w o r d s: aluminum, polarization, impedance, electrochemical noise, adsorption, nanostructure","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78214501","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}
{"title":"Isothermal oxidation kinetics of laser cladded NiCoCrAl/WC + La2O3 hybrid composite coatings at 700 °C","authors":"P. Ashtari, N. P. Ahmadi, S. Yazdani","doi":"10.4149/km_2021_4_269","DOIUrl":"https://doi.org/10.4149/km_2021_4_269","url":null,"abstract":"","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83311230","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}
In this study, AISI 430/AISI 1040 steel couple 10 mm thick were welded in the butt position without any pre-treatment using keyhole plasma transferred arc (KPTA) process. Welded joints were manufactured selecting constant welding speed (0.01 mmin−1) and two different nozzle orifice diameters (2.4 and 3.2 mm), three different welding currents (130, 135 and 140 A), at a constant plasma gas flow (1.2 l min−1), a shielding gas flow (25 l min−1). The microstructural changes that occurred in the interface regions of the welded samples were examined by microhardness, scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). In order to determine mechanical properties of samples, the V-notch Charpy tests were performed. In addition, fracture types in the notch impact strength tests of samples were determined from the fractographic examinations using SEM. K e y w o r d s: plasma transferred arc welding, keyhole, AISI 430, AISI 1040, nozzle orifice diameter
在本研究中，采用不进行任何预处理的锁孔等离子转移电弧(KPTA)工艺，在对接位置焊接了10 mm厚的AISI 430/AISI 1040钢对。在恒定的等离子体气体流量(1.2 l min - 1)和保护气体流量(25 l min - 1)下，选择恒定的焊接速度(0.01 mm - 1)、两种不同的喷嘴直径(2.4 mm和3.2 mm)、三种不同的焊接电流(130、135和140 A)来制造焊接接头。采用显微硬度、扫描电子显微镜(SEM)、x射线衍射仪(XRD)和能谱仪(EDS)分析了焊接试样界面区微观组织的变化。为了确定试样的力学性能，进行了v形缺口夏比试验。此外，通过扫描电镜的断口分析，确定了试样缺口冲击强度试验中的断裂类型。焊接工艺:等离子转移弧焊，锁孔，AISI 430, AISI 1040，喷嘴孔径
{"title":"The effect of nozzle orifice diameter on penetration depth and mechanical properties of AISI430/AISI1040 dissimilar steel joined by keyhole PTA welding process","authors":"T. Teker, N. Özdemir","doi":"10.4149/km_2013_4_241","DOIUrl":"https://doi.org/10.4149/km_2013_4_241","url":null,"abstract":"In this study, AISI 430/AISI 1040 steel couple 10 mm thick were welded in the butt position without any pre-treatment using keyhole plasma transferred arc (KPTA) process. Welded joints were manufactured selecting constant welding speed (0.01 mmin−1) and two different nozzle orifice diameters (2.4 and 3.2 mm), three different welding currents (130, 135 and 140 A), at a constant plasma gas flow (1.2 l min−1), a shielding gas flow (25 l min−1). The microstructural changes that occurred in the interface regions of the welded samples were examined by microhardness, scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). In order to determine mechanical properties of samples, the V-notch Charpy tests were performed. In addition, fracture types in the notch impact strength tests of samples were determined from the fractographic examinations using SEM. K e y w o r d s: plasma transferred arc welding, keyhole, AISI 430, AISI 1040, nozzle orifice diameter","PeriodicalId":18519,"journal":{"name":"Metallic Materials","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75312176","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：