Pub Date : 2023-09-23DOI: 10.1080/13640461.2023.2260662
Niveen Jamal Abdulkader, Mayyadah Shanan Abed
ABSTRACTThis study focuses on the synthesis of a Zn-Al alloy nanocomposite, incorporating varying weight percentages (2, 4, 6, and 8 wt.%) of SiC nanoparticles with an average size of 30 nm. The preparation was carried out using the stir casting technique. Experimental tests, including hardness, compression, and tensile tests, were conducted on both the Zn-Al alloy and its composite. Furthermore, the surface morphology of the materials was examined using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The mechanical properties and microstructure of the composite samples were assessed. The results indicate that an increase in the weight percentage of SiC nanoparticles led to corresponding increases in hardness, compression strength, and ultimate tensile strength of the composite materials. When compared to an unreinforced alloy, nanocomposites reinforced with 2, 4, 6, and 8 wt.% SiC nanoparticles exhibited hardness improvements of 9.1%, 15%, 20.8%, and 30% respectively, as well as increases in ultimate tensile strength of 2.56%, 4.46%, 7.74%, and 12.21%, and compression strength enhancements of 17.5%, 20%, 22.4%, and 31.5% respectively. Notably, the composite sample containing 8% weight of reinforcement consistently demonstrated the highest ratings in terms of hardness, tensile strength, and compression strength. Based on the scanning electron microscopy (SEM) results, the nanocomposite alloy exhibits a dendritic morphology, with evenly distributed silicon carbide (SiC) particles embedded within the metal matrix. Furthermore, the interface between the SiC particles and the metal matrix demonstrates a strong bond. As a consequence, the mechanical properties of the fabricated composites were significantly improved.KEYWORDS: Zn-Al alloystir castingmechanical propertiesSilicon carbidenanoparticles AcknowledgmentsThe authors would like to acknowledge and thank all of their colleagues at the Department of Materials Engineering/University of Technology- Iraq for their excellent contributions, which helped them complete and improve this study.Disclosure statementNo potential conflict of interest was reported by the authors.Data availability statementThe data used to support the findings of this study are available from the corresponding author upon request.CreditNiveen Jamal Abdulkader1: Conceptualisation, Methodology, Planning, Investigation, analysis, Writing the First Draft.Mayyadah S. Abed2*: Methodology, Investigation, Analysis, Feedback checking, Supervision, Writing, and Editing the Final Manuscript.Additional informationFundingThis study did not receive any funding in any form.
摘要:本研究的重点是合成一种锌铝合金纳米复合材料，该复合材料采用不同重量百分比(2、4、6和8 wt.%)的SiC纳米颗粒，平均尺寸为30 nm。采用搅拌铸造工艺进行了制备。对Zn-Al合金及其复合材料进行了硬度、压缩和拉伸试验。利用扫描电子显微镜(SEM)和能谱仪(EDS)对材料的表面形貌进行了表征。对复合材料的力学性能和显微组织进行了评价。结果表明，随着SiC纳米颗粒含量的增加，复合材料的硬度、抗压强度和极限抗拉强度均有相应的提高。与未增强的合金相比，添加2、4、6和8 wt.% SiC纳米颗粒的复合材料硬度分别提高了9.1%、15%、20.8%和30%，抗拉强度分别提高了2.56%、4.46%、7.74%和12.21%，抗压强度分别提高了17.5%、20%、22.4%和31.5%。值得注意的是，含有8%重量增强的复合材料样品在硬度、抗拉强度和抗压强度方面始终表现出最高的评级。基于扫描电镜(SEM)结果，纳米复合合金呈现枝晶形态，均匀分布的碳化硅(SiC)颗粒嵌入金属基体中。此外，SiC颗粒与金属基体之间的界面表现出很强的结合。结果表明，复合材料的力学性能得到了显著改善。关键词:Zn-Al合金搅拌铸造力学性能碳化硅颗粒致谢作者感谢伊拉克理工大学材料工程系的所有同事，他们的杰出贡献帮助他们完成和完善了这项研究。披露声明作者未报告潜在的利益冲突。数据可用性声明用于支持本研究结果的数据可应要求从通讯作者处获得。CreditNiveen Jamal Abdulkader1:概念化，方法论，规划，调查，分析，撰写初稿。Mayyadah S. Abed2*:方法，调查，分析，反馈检查，监督，写作和编辑最终稿件。本研究未获得任何形式的资助。
{"title":"Influence of SiC nanoparticles addition on the microstructure and mechanical properties of stir-casted Zn-Al alloy","authors":"Niveen Jamal Abdulkader, Mayyadah Shanan Abed","doi":"10.1080/13640461.2023.2260662","DOIUrl":"https://doi.org/10.1080/13640461.2023.2260662","url":null,"abstract":"ABSTRACTThis study focuses on the synthesis of a Zn-Al alloy nanocomposite, incorporating varying weight percentages (2, 4, 6, and 8 wt.%) of SiC nanoparticles with an average size of 30 nm. The preparation was carried out using the stir casting technique. Experimental tests, including hardness, compression, and tensile tests, were conducted on both the Zn-Al alloy and its composite. Furthermore, the surface morphology of the materials was examined using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The mechanical properties and microstructure of the composite samples were assessed. The results indicate that an increase in the weight percentage of SiC nanoparticles led to corresponding increases in hardness, compression strength, and ultimate tensile strength of the composite materials. When compared to an unreinforced alloy, nanocomposites reinforced with 2, 4, 6, and 8 wt.% SiC nanoparticles exhibited hardness improvements of 9.1%, 15%, 20.8%, and 30% respectively, as well as increases in ultimate tensile strength of 2.56%, 4.46%, 7.74%, and 12.21%, and compression strength enhancements of 17.5%, 20%, 22.4%, and 31.5% respectively. Notably, the composite sample containing 8% weight of reinforcement consistently demonstrated the highest ratings in terms of hardness, tensile strength, and compression strength. Based on the scanning electron microscopy (SEM) results, the nanocomposite alloy exhibits a dendritic morphology, with evenly distributed silicon carbide (SiC) particles embedded within the metal matrix. Furthermore, the interface between the SiC particles and the metal matrix demonstrates a strong bond. As a consequence, the mechanical properties of the fabricated composites were significantly improved.KEYWORDS: Zn-Al alloystir castingmechanical propertiesSilicon carbidenanoparticles AcknowledgmentsThe authors would like to acknowledge and thank all of their colleagues at the Department of Materials Engineering/University of Technology- Iraq for their excellent contributions, which helped them complete and improve this study.Disclosure statementNo potential conflict of interest was reported by the authors.Data availability statementThe data used to support the findings of this study are available from the corresponding author upon request.CreditNiveen Jamal Abdulkader1: Conceptualisation, Methodology, Planning, Investigation, analysis, Writing the First Draft.Mayyadah S. Abed2*: Methodology, Investigation, Analysis, Feedback checking, Supervision, Writing, and Editing the Final Manuscript.Additional informationFundingThis study did not receive any funding in any form.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135966216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-27DOI: 10.1080/13640461.2023.2237651
J. Grilo, H. Puga
ABSTRACT Simulations of manufacturing processes typically rely on commercial or publicly available material databases. In the casting process, additives such as grain refiners and eutectic Si modifiers can affect the properties of molten metal during solidification. However, these effects are not always represented in the material’s thermophysical characteristics. This study differentiates the simulated filling and defect indicators of a aluminium alloy from different material databases. Further, to account the effect of the grain refiner, thermal analysis data from a Al-7Si-Mg alloy with 0.2 wt.% Al-5Ti-B is used to create a corrected alloy that minimises the difference between numerical and experimental results. Results indicate that minor differences in thermophysical properties can affect misrun risk and filling temperatures. The corrected alloy more accurately represents heat release during phase transformation and reduces the temperature error from 7°C to 4°C. Additionally, it more accurately represents shrinkage, with the exception of some localised defects.
{"title":"Thermal analysis strategy for Al-7Si-Mg alloy sand-casting modelling","authors":"J. Grilo, H. Puga","doi":"10.1080/13640461.2023.2237651","DOIUrl":"https://doi.org/10.1080/13640461.2023.2237651","url":null,"abstract":"ABSTRACT Simulations of manufacturing processes typically rely on commercial or publicly available material databases. In the casting process, additives such as grain refiners and eutectic Si modifiers can affect the properties of molten metal during solidification. However, these effects are not always represented in the material’s thermophysical characteristics. This study differentiates the simulated filling and defect indicators of a aluminium alloy from different material databases. Further, to account the effect of the grain refiner, thermal analysis data from a Al-7Si-Mg alloy with 0.2 wt.% Al-5Ti-B is used to create a corrected alloy that minimises the difference between numerical and experimental results. Results indicate that minor differences in thermophysical properties can affect misrun risk and filling temperatures. The corrected alloy more accurately represents heat release during phase transformation and reduces the temperature error from 7°C to 4°C. Additionally, it more accurately represents shrinkage, with the exception of some localised defects.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42543010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-17DOI: 10.1080/13640461.2023.2237650
F. Ficici, M. Keser
ABSTRACT In this study, the effects of casting modifiers on the surface roughness and chip formation of Al-12Si alloy materials were experimentally investigated. Machinability tests were carried out using a conventional lathe. Machinability tests were performed on four different materials, Etial 140, Etial 140 +CuSn5, Etial 140 +Al10Sr and Etial 140 +Al10Sr+CuSn5, respectively. A constant depth of cut, 3 different cutting speeds (Vc: 35, 95, 135 m/min) and three different feed rates (f: 0.08, 0.16, and 0.32 mm/rev) were chosen as test parameters. The most effective roughness reduction under these test conditions was 7.21% for the Al10Sr modified test material. According to the measured density values of the unmodified material, the density values of the other tested materials increased by 1.65% for CuSn5, 0.40% for Al10Sr and 1.16% for CuSn5+Al10Sr. Furthermore, the hardness values increased by 5.48% for CuSn5, 0.58% for Al10Sr, and 15.75% for CuSn5+Al10Sr.
{"title":"Effect of casting modifiers on surface roughness and chip formation of Al-12Si alloy","authors":"F. Ficici, M. Keser","doi":"10.1080/13640461.2023.2237650","DOIUrl":"https://doi.org/10.1080/13640461.2023.2237650","url":null,"abstract":"ABSTRACT In this study, the effects of casting modifiers on the surface roughness and chip formation of Al-12Si alloy materials were experimentally investigated. Machinability tests were carried out using a conventional lathe. Machinability tests were performed on four different materials, Etial 140, Etial 140 +CuSn5, Etial 140 +Al10Sr and Etial 140 +Al10Sr+CuSn5, respectively. A constant depth of cut, 3 different cutting speeds (Vc: 35, 95, 135 m/min) and three different feed rates (f: 0.08, 0.16, and 0.32 mm/rev) were chosen as test parameters. The most effective roughness reduction under these test conditions was 7.21% for the Al10Sr modified test material. According to the measured density values of the unmodified material, the density values of the other tested materials increased by 1.65% for CuSn5, 0.40% for Al10Sr and 1.16% for CuSn5+Al10Sr. Furthermore, the hardness values increased by 5.48% for CuSn5, 0.58% for Al10Sr, and 15.75% for CuSn5+Al10Sr.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42060189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-27DOI: 10.1080/13640461.2023.2217621
Seungcheol Lee, Dosuck Han, Naksoo Kim
ABSTRACT This research presents a design process for mould cavity monitoring with a temperature and force-generated pressure measurement system in high-pressure Die casting (HPDC). K-type thermocouple sensor was selected to measure the harsh environment of the Mould Cavity. An eject pin was processed and used for the installation of the sensor in the measurement system, and data was collected from the sensor and displayed as a real-time graph. The rationality of the obtained data was verified with comparative analysis with finite element analysis simulation (FEM) result as a reverse engineering approach. The proposed system is successfully measuring and monitoring the temperature and pressure inside the mould, allowing for the safe monitoring of Die casting. Through monitoring, abnormal conditions in the process can be detected. It is expected that this will reduce the defect rate and improve the quality of manufactured products.
{"title":"Design and implementation of a remote monitoring system of mold cavity using eject pin in high-pressure die casting","authors":"Seungcheol Lee, Dosuck Han, Naksoo Kim","doi":"10.1080/13640461.2023.2217621","DOIUrl":"https://doi.org/10.1080/13640461.2023.2217621","url":null,"abstract":"ABSTRACT This research presents a design process for mould cavity monitoring with a temperature and force-generated pressure measurement system in high-pressure Die casting (HPDC). K-type thermocouple sensor was selected to measure the harsh environment of the Mould Cavity. An eject pin was processed and used for the installation of the sensor in the measurement system, and data was collected from the sensor and displayed as a real-time graph. The rationality of the obtained data was verified with comparative analysis with finite element analysis simulation (FEM) result as a reverse engineering approach. The proposed system is successfully measuring and monitoring the temperature and pressure inside the mould, allowing for the safe monitoring of Die casting. Through monitoring, abnormal conditions in the process can be detected. It is expected that this will reduce the defect rate and improve the quality of manufactured products.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45970358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-24DOI: 10.1080/13640461.2023.2214496
Z. Guangwei, Chen Jian, Ding Chong, Yan Erhu, Ye Xicong
ABSTRACT The liquid solidification paths of ternary eutectic and quasiperitectic Al-Cu-Mg alloys in Al-rich corner were calculated using an extended microsegregation model. The user’s programs were coupled with CALPHAD software for calculating the thermodynamic data of the investigated alloys. The influences of initial composition, average solidification rate, assumption of dendrite morphology, diffusion coefficient and the united solid back diffusion (SBD) parameter Фn on solidification paths were investigated. It was found that differences of the above parameters could greatly affect the liquid solidification path, types and quantities of the precipitated phases, and concentration of solutes in liquid phase. Solidification experiments were carried out with four Al-Cu-Mg alloys to verify the accuracy of the calculation, and reasonable agreements were obtained between the predicted solidification paths and the experiment results.
{"title":"Solidification Path Calculation of ternary Al-Cu-Mg alloys in Al rich corner","authors":"Z. Guangwei, Chen Jian, Ding Chong, Yan Erhu, Ye Xicong","doi":"10.1080/13640461.2023.2214496","DOIUrl":"https://doi.org/10.1080/13640461.2023.2214496","url":null,"abstract":"ABSTRACT The liquid solidification paths of ternary eutectic and quasiperitectic Al-Cu-Mg alloys in Al-rich corner were calculated using an extended microsegregation model. The user’s programs were coupled with CALPHAD software for calculating the thermodynamic data of the investigated alloys. The influences of initial composition, average solidification rate, assumption of dendrite morphology, diffusion coefficient and the united solid back diffusion (SBD) parameter Фn on solidification paths were investigated. It was found that differences of the above parameters could greatly affect the liquid solidification path, types and quantities of the precipitated phases, and concentration of solutes in liquid phase. Solidification experiments were carried out with four Al-Cu-Mg alloys to verify the accuracy of the calculation, and reasonable agreements were obtained between the predicted solidification paths and the experiment results.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43855749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-23DOI: 10.1080/13640461.2023.2216479
Seyed Amir Farokh Fatemi, F. Bashirzadeh, T. Saeid
ABSTRACT In just one step, a squeeze casting process was applied to produce aluminium foam sandwich panels. NaCl particles with mean sizes of 4.75 and 6.35 mm were used as space holders in different proportions. In-situ face sheet manufacturing was conducted through previously placed steel meshes in the mould. The effect of NaCl particle sizes and the proportion of each size on porosity, microstructure, and mechanical properties were investigated. Results showed a decline from 59.8% to 43.8% in the porosity amount of samples with increasing the proportion of larger NaCl particles. Accordingly, an increase in compression yield stress (from 3.2 to 6.1 kgf/mm2) and the absorbed energy were observed. Also, at the elevated densities of the sandwich panel core, the plateau stress was enhanced. The presence of Cu, Ni, Fe, and Si elements leads to the formation of brittle intermetallic compounds in the microstructure of cell walls.
{"title":"Microstructural and mechanical characterisation of reinforced aluminium foam sandwich panels made by one-step squeeze casting method","authors":"Seyed Amir Farokh Fatemi, F. Bashirzadeh, T. Saeid","doi":"10.1080/13640461.2023.2216479","DOIUrl":"https://doi.org/10.1080/13640461.2023.2216479","url":null,"abstract":"ABSTRACT In just one step, a squeeze casting process was applied to produce aluminium foam sandwich panels. NaCl particles with mean sizes of 4.75 and 6.35 mm were used as space holders in different proportions. In-situ face sheet manufacturing was conducted through previously placed steel meshes in the mould. The effect of NaCl particle sizes and the proportion of each size on porosity, microstructure, and mechanical properties were investigated. Results showed a decline from 59.8% to 43.8% in the porosity amount of samples with increasing the proportion of larger NaCl particles. Accordingly, an increase in compression yield stress (from 3.2 to 6.1 kgf/mm2) and the absorbed energy were observed. Also, at the elevated densities of the sandwich panel core, the plateau stress was enhanced. The presence of Cu, Ni, Fe, and Si elements leads to the formation of brittle intermetallic compounds in the microstructure of cell walls.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44576055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-04DOI: 10.1080/13640461.2023.2207894
Vineet Chak, H. Chattopadhyay
ABSTRACT The recent shoot-up in demand for lightweight materials with tailored properties has increased the interest of researchers, metallurgical and materials engineers towards aluminium matrix composites (AMCs). AMCs are light and rich in properties like corrosion, strength and wear. Moreover, AMCs are among the most economical compared to their counterparts due to the low cost and availability of aluminium. AMCs are gaining employment in many engineering sectors including power, construction, automobile and aerospace. Selection of suitable base materials and compatible reinforcement is of prime importance. Therefore, in the current study, an attempt has been made to develop an effective and economical silicon carbide-reinforced AMCs through stirring-assisted squeeze casting. Mechanical, metallurgical and wear investigations were done on the developed AMCs to determine the influence of ceramic addition on the base matrix. Microstructural investigations revealed grain refinement with even dispersion of silicon carbide in aluminium matrix. The ceramic reinforcement has also led to an increase of about 62% in ultimate tensile strength and 30% in microhardness of composites over the base matrix. Improvement in properties and microstructure can be attributed to grain refinement, reduction in porosity and strengthening of the aluminium matrix by the reinforcement particles. In addition, the tribological behaviour of the fabricated composites showed significant improvement with a reduction in wear rate and friction coefficient.
{"title":"Mechanical and tribological properties of ceramic–aluminium composites developed using stirring-assisted squeeze casting","authors":"Vineet Chak, H. Chattopadhyay","doi":"10.1080/13640461.2023.2207894","DOIUrl":"https://doi.org/10.1080/13640461.2023.2207894","url":null,"abstract":"ABSTRACT The recent shoot-up in demand for lightweight materials with tailored properties has increased the interest of researchers, metallurgical and materials engineers towards aluminium matrix composites (AMCs). AMCs are light and rich in properties like corrosion, strength and wear. Moreover, AMCs are among the most economical compared to their counterparts due to the low cost and availability of aluminium. AMCs are gaining employment in many engineering sectors including power, construction, automobile and aerospace. Selection of suitable base materials and compatible reinforcement is of prime importance. Therefore, in the current study, an attempt has been made to develop an effective and economical silicon carbide-reinforced AMCs through stirring-assisted squeeze casting. Mechanical, metallurgical and wear investigations were done on the developed AMCs to determine the influence of ceramic addition on the base matrix. Microstructural investigations revealed grain refinement with even dispersion of silicon carbide in aluminium matrix. The ceramic reinforcement has also led to an increase of about 62% in ultimate tensile strength and 30% in microhardness of composites over the base matrix. Improvement in properties and microstructure can be attributed to grain refinement, reduction in porosity and strengthening of the aluminium matrix by the reinforcement particles. In addition, the tribological behaviour of the fabricated composites showed significant improvement with a reduction in wear rate and friction coefficient.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"36 1","pages":"65 - 75"},"PeriodicalIF":1.4,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46913115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-04DOI: 10.1080/13640461.2023.2211895
P. Das
ABSTRACT In this study, a computational fluid dynamics (CFD) model is employed to optimise the melt pouring temperature during Low superheat casting (LSC) of the Al-15 Mg2Si-4.5Si composite. The die cavity considered to perform the die filling simulations corresponds to the as-cast tensile specimens, as per ASTM B557 guidelines. The findings of the study include melt temperature distribution, solid fraction distribution during filling as well as during solidification, velocity distribution of the melt and surface defect concentration. Experimentation is performed to develop low superheat cast composite based on the numerically estimated optimum melt pouring temperature of 650°C. Mixture of irregular dendritic, polygonal and equiaxed shaped primary Mg2Si grains are observed within the cast parts, whereas primary Al grains are found to be of dendritic morphology with occasional presence of spheroids. Marked improvements in microstructure and mechanical properties have been evidenced in the LSC composite compared to its conventional cast counterpart.
{"title":"Optimisation of melt pouring temperature and low superheat casting of Al-15Mg2Si-4.5Si composite","authors":"P. Das","doi":"10.1080/13640461.2023.2211895","DOIUrl":"https://doi.org/10.1080/13640461.2023.2211895","url":null,"abstract":"ABSTRACT In this study, a computational fluid dynamics (CFD) model is employed to optimise the melt pouring temperature during Low superheat casting (LSC) of the Al-15 Mg2Si-4.5Si composite. The die cavity considered to perform the die filling simulations corresponds to the as-cast tensile specimens, as per ASTM B557 guidelines. The findings of the study include melt temperature distribution, solid fraction distribution during filling as well as during solidification, velocity distribution of the melt and surface defect concentration. Experimentation is performed to develop low superheat cast composite based on the numerically estimated optimum melt pouring temperature of 650°C. Mixture of irregular dendritic, polygonal and equiaxed shaped primary Mg2Si grains are observed within the cast parts, whereas primary Al grains are found to be of dendritic morphology with occasional presence of spheroids. Marked improvements in microstructure and mechanical properties have been evidenced in the LSC composite compared to its conventional cast counterpart.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"36 1","pages":"76 - 89"},"PeriodicalIF":1.4,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60012683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-17DOI: 10.1080/13640461.2023.2204041
Y. Gu, G. Peng, Xiaoyun Fu, G. S. Song, S.S. Chen, S.Y. Chen
ABSTRACT The modifying influence of aluminium phosphide to the morphology of primary Si and eutectic Si was investigated in hypereutectic Al-20Si alloys via adding Al-Cu-P master alloy (0.5, 1, 20 wt.%). Microstructural results showed when Al-Cu-P addition from 0 to 0.5%, primary Si phase decreases and eutectic Si phase size remains invariable; when addition higher than 0.5%, primary Si phase keeps invariable, eutectic Si phase size increases. To prove the nucleation effect of AlP on Si phase, interfacial properties of Si/AlP interface were investigated using first-principles calculations. Results showed the AlP(100)/Si(100) interface energy is between −1.45 J/m2 and −1.38 J/m2 for Al-terminated and P-terminated AlP model, both is much smaller than liquid Si/crystalline Si interface (0.34 J/m2), consolidates that AlP particles possess strong nucleation potency for Si phases. Therefore, the modifying influence of AlP to the morphology Si phase is well clarified as a function of AlP content in Al-20Si alloys.
{"title":"Mechanism of AlP modifying the morphology of Si in Al-20Si alloys based on experimental studies and first-principles calculations","authors":"Y. Gu, G. Peng, Xiaoyun Fu, G. S. Song, S.S. Chen, S.Y. Chen","doi":"10.1080/13640461.2023.2204041","DOIUrl":"https://doi.org/10.1080/13640461.2023.2204041","url":null,"abstract":"ABSTRACT The modifying influence of aluminium phosphide to the morphology of primary Si and eutectic Si was investigated in hypereutectic Al-20Si alloys via adding Al-Cu-P master alloy (0.5, 1, 20 wt.%). Microstructural results showed when Al-Cu-P addition from 0 to 0.5%, primary Si phase decreases and eutectic Si phase size remains invariable; when addition higher than 0.5%, primary Si phase keeps invariable, eutectic Si phase size increases. To prove the nucleation effect of AlP on Si phase, interfacial properties of Si/AlP interface were investigated using first-principles calculations. Results showed the AlP(100)/Si(100) interface energy is between −1.45 J/m2 and −1.38 J/m2 for Al-terminated and P-terminated AlP model, both is much smaller than liquid Si/crystalline Si interface (0.34 J/m2), consolidates that AlP particles possess strong nucleation potency for Si phases. Therefore, the modifying influence of AlP to the morphology Si phase is well clarified as a function of AlP content in Al-20Si alloys. ","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"36 1","pages":"56 - 64"},"PeriodicalIF":1.4,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45804500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-14DOI: 10.1080/13640461.2023.2202078
Hanieh Soltani Banavandi, R. Raiszadeh
ABSTRACT The possibility of bonding between two layers of a bifilm defect submerged in a Zn4Al liquid alloy is studied by maintaining two bars in contact with each other and the atmosphere trapped between them in a furnace for different times up to 48 h. The oxide layers on the bases of the bars were then studied by SEM, EDS, and XRD. The oxide layers on the bars' bases were identified as ZnAl2O4. This phase transformed to ZnO when the concentration of Al in the vicinity of the oxide layers decreased dramatically. This transformation was reversible, and ZnO changed back to ZnAl2O4 when an adequate Al concentration was provided near the layers. However, it is shown that these transformations, and hence the healing of bifilm defects, are improbable to occur in actual bifilm defects submerged in Zn4Al melt.
{"title":"Resistance to healing of bifilm defects in Zn4Al zinc alloy","authors":"Hanieh Soltani Banavandi, R. Raiszadeh","doi":"10.1080/13640461.2023.2202078","DOIUrl":"https://doi.org/10.1080/13640461.2023.2202078","url":null,"abstract":"ABSTRACT The possibility of bonding between two layers of a bifilm defect submerged in a Zn4Al liquid alloy is studied by maintaining two bars in contact with each other and the atmosphere trapped between them in a furnace for different times up to 48 h. The oxide layers on the bases of the bars were then studied by SEM, EDS, and XRD. The oxide layers on the bars' bases were identified as ZnAl2O4. This phase transformed to ZnO when the concentration of Al in the vicinity of the oxide layers decreased dramatically. This transformation was reversible, and ZnO changed back to ZnAl2O4 when an adequate Al concentration was provided near the layers. However, it is shown that these transformations, and hence the healing of bifilm defects, are improbable to occur in actual bifilm defects submerged in Zn4Al melt.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"36 1","pages":"45 - 55"},"PeriodicalIF":1.4,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47313935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","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：