Pub Date : 2022-11-02DOI: 10.1080/13640461.2023.2172372
Pascal Gauthier, M. Javidani, Tao Wang, John Evans
ABSTRACT The source of surface blister defect in 6xxx series Al rolled products was studied. A blister defect, aligned with the rolling direction, was observed on the surface of the AA6xxx Al rolled sheets. It was indicated that the porosities and small microstructural inhomogeneities inside the cast ingots, identified by ultrasonic tests and metallography analysis, were not the origin of these surface defects. Pilot scale rolling trials indicated that the blister defects were correlated with the longitudinal internal casting cracks. The short side cracks in the cast ingots, covered by a thin Al oxide layer, were not healed and remained partially open after the rolling process. The unhealed cracks served as the nucleation sites for H2 precipitation during the later stages of the thermomechanical process, which were subsequently resulted from surface blisters on the AA6xxx Al rolled sheets.
{"title":"Formation mechanisms of surface blistering in AA6xxx rolled products: microstructure characterisation, ultrasonic analysis, and rolling tests results","authors":"Pascal Gauthier, M. Javidani, Tao Wang, John Evans","doi":"10.1080/13640461.2023.2172372","DOIUrl":"https://doi.org/10.1080/13640461.2023.2172372","url":null,"abstract":"ABSTRACT The source of surface blister defect in 6xxx series Al rolled products was studied. A blister defect, aligned with the rolling direction, was observed on the surface of the AA6xxx Al rolled sheets. It was indicated that the porosities and small microstructural inhomogeneities inside the cast ingots, identified by ultrasonic tests and metallography analysis, were not the origin of these surface defects. Pilot scale rolling trials indicated that the blister defects were correlated with the longitudinal internal casting cracks. The short side cracks in the cast ingots, covered by a thin Al oxide layer, were not healed and remained partially open after the rolling process. The unhealed cracks served as the nucleation sites for H2 precipitation during the later stages of the thermomechanical process, which were subsequently resulted from surface blisters on the AA6xxx Al rolled sheets.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45381603","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 : 2022-11-02DOI: 10.1080/13640461.2023.2167285
A. Mamayeva, A. Panichkin, M. Chukmanova, A. Imbarova, B. Kenzhaliyev, V. Belov
ABSTRACT The problem to obtain casting molds for titanium alloys is not resolved in full. It is primarily due to the high reactivity of titanium alloys resulting in their interaction with refractory materials. This reduces the quality of the castings due to the formation of various defects. The interaction of VT1-0 grade titanium in the liquid state with CaO, ZrO2 and CaZrO3 were studied. The processes occurring at the contact boundary between these substances and a change in the structure and microhardness of titanium castings near this boundary were described herein. The data obtained showed the disadvantages of molding materials based on CaO and CaZrO3. The features revealed for the interaction of a titanium melt with CaZrO3, where a highly porous CaTiO3 layer has been formed in the reaction zone,made it possible to recommend this compound as a promising material to cast molds in order to produce castings from titanium alloys.
{"title":"Investigation of the mechanism for interaction of calcium zirconate, oxides of calcium and zirconium with titanium melts","authors":"A. Mamayeva, A. Panichkin, M. Chukmanova, A. Imbarova, B. Kenzhaliyev, V. Belov","doi":"10.1080/13640461.2023.2167285","DOIUrl":"https://doi.org/10.1080/13640461.2023.2167285","url":null,"abstract":"ABSTRACT The problem to obtain casting molds for titanium alloys is not resolved in full. It is primarily due to the high reactivity of titanium alloys resulting in their interaction with refractory materials. This reduces the quality of the castings due to the formation of various defects. The interaction of VT1-0 grade titanium in the liquid state with CaO, ZrO2 and CaZrO3 were studied. The processes occurring at the contact boundary between these substances and a change in the structure and microhardness of titanium castings near this boundary were described herein. The data obtained showed the disadvantages of molding materials based on CaO and CaZrO3. The features revealed for the interaction of a titanium melt with CaZrO3, where a highly porous CaTiO3 layer has been formed in the reaction zone,made it possible to recommend this compound as a promising material to cast molds in order to produce castings from titanium alloys.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43264479","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 : 2022-11-02DOI: 10.1080/13640461.2023.2172371
Fusheng Pan, Han Lin, Ming-bo Yang, H. Tang
ABSTRACT Microstructures and mechanical properties of AZ91-Sb magnesium alloy fabricated by low-pressure shell casting (LPSC) process in different conditions were investigated. The as-cast alloy exhibited a good internal quality and denser structure. The microstructure of α-Mg phases displayed dendritic feature and fine isolated β-Mg17Al12 particles phases uniformly distributed in the matrix. After the solution treatment at 415°C for 12 h, almost β-Mg17Al12 phases dissolved into the matrix. After ageing treatment at 200°C for 14 h, the LPSC alloy attained the peak hardness with restrained age-hardening kinetics. The discontinuous precipitates initiated at the grain boundaries and then continuous precipitates occurred in the grain interior. The LPSC alloy exhibits higher mechanical properties in both as-cast and heat-treated alloys compared with the gravity casting (GC) process alloy.
{"title":"Microstructure and mechanical properties of LPSC AZ91-Sb magnesium alloy","authors":"Fusheng Pan, Han Lin, Ming-bo Yang, H. Tang","doi":"10.1080/13640461.2023.2172371","DOIUrl":"https://doi.org/10.1080/13640461.2023.2172371","url":null,"abstract":"ABSTRACT Microstructures and mechanical properties of AZ91-Sb magnesium alloy fabricated by low-pressure shell casting (LPSC) process in different conditions were investigated. The as-cast alloy exhibited a good internal quality and denser structure. The microstructure of α-Mg phases displayed dendritic feature and fine isolated β-Mg17Al12 particles phases uniformly distributed in the matrix. After the solution treatment at 415°C for 12 h, almost β-Mg17Al12 phases dissolved into the matrix. After ageing treatment at 200°C for 14 h, the LPSC alloy attained the peak hardness with restrained age-hardening kinetics. The discontinuous precipitates initiated at the grain boundaries and then continuous precipitates occurred in the grain interior. The LPSC alloy exhibits higher mechanical properties in both as-cast and heat-treated alloys compared with the gravity casting (GC) process alloy.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44697643","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 : 2022-11-02DOI: 10.1080/13640461.2022.2146918
Xiang-Jie Wang, Lin-Lin Yang, H. Tan, F. Yu, Jianzhong Cui
ABSTRACT The ingots of Al-6Cu alloy were prepared by the wedge-shaped copper mode casting with the cooling rates of 2 K/s, 10 K/s, 25 K/s and 100 K/s to explore the effect of cooling rate on the area fraction of eutectic constituent, α-Al lattice parameter and relative solid solubility. The experimental results revealed that when the cooling rate rose from 2 K/s to 10 K/s, the area fraction of the eutectic constituent and the lattice parameter of α-Al decelerated, but the relative solid solubility of α-Al increased. When the cooling rate continued to reach 100 K/s, the area fraction of the eutectic constituent and the α-Al lattice parameter elevated, lowering the α-Al relative solid solubility. According to the model of non-diffusion of solid phase and incomplete mixed solidification of a liquid phase, as for Al-6Cu alloy, relative solid solubility initially increases and then decreases with a boost in cooling rate. The model results are consistent with the experimental results.
{"title":"Effect of cooling rate on eutectic constituent and solid solubility of Al-6Cu alloy","authors":"Xiang-Jie Wang, Lin-Lin Yang, H. Tan, F. Yu, Jianzhong Cui","doi":"10.1080/13640461.2022.2146918","DOIUrl":"https://doi.org/10.1080/13640461.2022.2146918","url":null,"abstract":"ABSTRACT The ingots of Al-6Cu alloy were prepared by the wedge-shaped copper mode casting with the cooling rates of 2 K/s, 10 K/s, 25 K/s and 100 K/s to explore the effect of cooling rate on the area fraction of eutectic constituent, α-Al lattice parameter and relative solid solubility. The experimental results revealed that when the cooling rate rose from 2 K/s to 10 K/s, the area fraction of the eutectic constituent and the lattice parameter of α-Al decelerated, but the relative solid solubility of α-Al increased. When the cooling rate continued to reach 100 K/s, the area fraction of the eutectic constituent and the α-Al lattice parameter elevated, lowering the α-Al relative solid solubility. According to the model of non-diffusion of solid phase and incomplete mixed solidification of a liquid phase, as for Al-6Cu alloy, relative solid solubility initially increases and then decreases with a boost in cooling rate. The model results are consistent with the experimental results.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46212697","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 : 2022-11-02DOI: 10.1080/13640461.2023.2173855
S. Kotiadis, A. Zimmer, A. Elsayed
ABSTRACT Aluminium alloys with Fe and Ni show potential as high castability alloys with high strength and high electrical/thermal conductivities for electric vehicle powertrains. Permanent mould castings of Al-Fe-Ni alloys with additions of Mg and Si were prepared to assess hot tearing susceptibility and mechanical properties. The electrical conductivity of the Al-Fe-Ni alloys was measured, and the Wiedemann-Franz law was used to estimate the thermal conductivity. The results show that a hot tear resistant Al-Fe-Ni alloy with composition Al-1.2Fe-0.5Mg-0.3Si-0.2Ni had an electrical conductivity of 50.91 ±0.29%IACS with yield strength, ultimate tensile strength, and elongation of 60.5 MPa, 141 MPa and 7.9%, respectively. The microstructure of the Al-Fe-Ni alloys contained primary Al, Al9FeNi and Mg2Si. The short freezing ranges and fine intermetallics allowed for good castability. The prepared Al-Fe-Ni alloys are potential new castable Al alloys that have thermal and electrical conductivity nearing wrought (6061 and 6101) compositions.
{"title":"Hot tearing and mechanical properties of high electrical and thermal conductivity Al-Fe-Mg-Si-Ni Alloys","authors":"S. Kotiadis, A. Zimmer, A. Elsayed","doi":"10.1080/13640461.2023.2173855","DOIUrl":"https://doi.org/10.1080/13640461.2023.2173855","url":null,"abstract":"ABSTRACT Aluminium alloys with Fe and Ni show potential as high castability alloys with high strength and high electrical/thermal conductivities for electric vehicle powertrains. Permanent mould castings of Al-Fe-Ni alloys with additions of Mg and Si were prepared to assess hot tearing susceptibility and mechanical properties. The electrical conductivity of the Al-Fe-Ni alloys was measured, and the Wiedemann-Franz law was used to estimate the thermal conductivity. The results show that a hot tear resistant Al-Fe-Ni alloy with composition Al-1.2Fe-0.5Mg-0.3Si-0.2Ni had an electrical conductivity of 50.91 ±0.29%IACS with yield strength, ultimate tensile strength, and elongation of 60.5 MPa, 141 MPa and 7.9%, respectively. The microstructure of the Al-Fe-Ni alloys contained primary Al, Al9FeNi and Mg2Si. The short freezing ranges and fine intermetallics allowed for good castability. The prepared Al-Fe-Ni alloys are potential new castable Al alloys that have thermal and electrical conductivity nearing wrought (6061 and 6101) compositions.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48168594","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 : 2022-11-02DOI: 10.1080/13640461.2023.2172519
Han Ye, Quan Li, Jia Gu, Xiang-jie Yang, Mengxin Long, R. Zeng, Ming-Hsuan Yang, Y. Gao, Shilin Li, Fusheng Zhu
ABSTRACT For the current, the thermal analysis sample cups used to predict the carbon and silicon content of cast iron melts are relatively large and take a long time for each measurement, a smaller cylindrical thermal analysis sample cup with an inner diameter of 25 mm and a height of 55 mm was studied for the analysis of carbon and silicon. The thermal analysis system can quickly measure the temperature characteristic values of the liquidus temperature TL and the eutectic temperature TE of the temperature curves related to carbon equivalent, carbon content and silicon content within 2 min, and mathematical models for the prediction of carbon equivalent CEL (3.2–4.7), carbon content C% (3.0–4.0%) and silicon content Si% (1.0–2.5%) was established by multiple linear regression in combination with optical emission spectroscopy: We had checked the accuracy, the average error of carbon equivalent and carbon content and silicon content did not exceed 0.05%.
{"title":"Use a smaller cylindrical thermal analysis sample cup to rapidly predict carbon and silicon content in cast iron","authors":"Han Ye, Quan Li, Jia Gu, Xiang-jie Yang, Mengxin Long, R. Zeng, Ming-Hsuan Yang, Y. Gao, Shilin Li, Fusheng Zhu","doi":"10.1080/13640461.2023.2172519","DOIUrl":"https://doi.org/10.1080/13640461.2023.2172519","url":null,"abstract":"ABSTRACT For the current, the thermal analysis sample cups used to predict the carbon and silicon content of cast iron melts are relatively large and take a long time for each measurement, a smaller cylindrical thermal analysis sample cup with an inner diameter of 25 mm and a height of 55 mm was studied for the analysis of carbon and silicon. The thermal analysis system can quickly measure the temperature characteristic values of the liquidus temperature TL and the eutectic temperature TE of the temperature curves related to carbon equivalent, carbon content and silicon content within 2 min, and mathematical models for the prediction of carbon equivalent CEL (3.2–4.7), carbon content C% (3.0–4.0%) and silicon content Si% (1.0–2.5%) was established by multiple linear regression in combination with optical emission spectroscopy: We had checked the accuracy, the average error of carbon equivalent and carbon content and silicon content did not exceed 0.05%.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47021036","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 : 2022-11-02DOI: 10.1080/13640461.2022.2149361
D. Dey, Abhijit Bhowmik, A. Biswas
ABSTRACT Present investigation aims at the fabrication of aluminium matrix composites reinforced with different weight percentages of titanium diboride (TiB2) particles and characterisation of their tribological behaviour. Wear tests are carried out on a pin-on-disc tribotester with four different process parameters viz. wt-% of reinforcement, load, sliding velocity and sliding distance. For assessing the tribological performance of composites, grey relational analysis is adopted. The percentage significance of all the parameters on tribological performance has also been evaluated by analysis of variance. Based on Grey-Taguchi approach, the optimal parametric combination is 9 wt-% of reinforcement, 10 N load, 2 m s−1 sliding velocity and 1000 m sliding distance. The optimal parametric combination based on the highest ranking of grey relational grade is validated by a confirmation experiment. Based on the results, it can be concluded that Grey-Taguchi method is an effective tool used for optimising the tribological performance of Al2024-TiB2 composites.
摘要:本研究旨在制备不同重量百分比的二硼化钛(TiB2)颗粒增强铝基复合材料，并表征其摩擦学性能。在销盘式摩擦试验机上进行了磨损试验，试验采用了四种不同的工艺参数，即增强率、载荷、滑动速度和滑动距离。采用灰色关联分析法对复合材料的摩擦学性能进行评价。所有参数对摩擦学性能的百分比显著性也通过方差分析进行了评估。基于gray - taguchi方法，优化参数组合为9 wt-%配筋、10 N荷载、2 m s - 1滑动速度和1000 m滑动距离。通过验证实验验证了基于灰色关联度最高排序的最优参数组合。结果表明，gray - taguchi方法是优化Al2024-TiB2复合材料摩擦学性能的有效工具。
{"title":"Tribological performance Optimization of Al2024-TiB2 composites using Grey-Taguchi approach","authors":"D. Dey, Abhijit Bhowmik, A. Biswas","doi":"10.1080/13640461.2022.2149361","DOIUrl":"https://doi.org/10.1080/13640461.2022.2149361","url":null,"abstract":"ABSTRACT Present investigation aims at the fabrication of aluminium matrix composites reinforced with different weight percentages of titanium diboride (TiB2) particles and characterisation of their tribological behaviour. Wear tests are carried out on a pin-on-disc tribotester with four different process parameters viz. wt-% of reinforcement, load, sliding velocity and sliding distance. For assessing the tribological performance of composites, grey relational analysis is adopted. The percentage significance of all the parameters on tribological performance has also been evaluated by analysis of variance. Based on Grey-Taguchi approach, the optimal parametric combination is 9 wt-% of reinforcement, 10 N load, 2 m s−1 sliding velocity and 1000 m sliding distance. The optimal parametric combination based on the highest ranking of grey relational grade is validated by a confirmation experiment. Based on the results, it can be concluded that Grey-Taguchi method is an effective tool used for optimising the tribological performance of Al2024-TiB2 composites.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44872613","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 : 2022-08-23DOI: 10.1080/13640461.2022.2115724
Muhammad Shahzad Aslam
ABSTRACT The existing sequential probability ratio under classical statistics is applied for testing the null hypothesis when all observations in the data are exact, precise and uncertain. In complex situations, the observations in the data may be imprecise and noted in the intervals. In this case, the existing sequential probability ratio cannot be applied for testing the hypothesis. This paper introduces the sequential probability ratio under neutrosophic statistics to deal with the data having imprecise and uncertain data. The statistic of the proposed test is introduced and applied for testing the hypothesis of alloy melting points data. From the alloy data analysis, simulation study and comparative study, it is concluded that the proposed neutrosophic sequential probability is adequate, informative and suitable to be applied in uncertainty.
{"title":"Alloy melting points data analysis using uncertainty-based sequential probability ratio test","authors":"Muhammad Shahzad Aslam","doi":"10.1080/13640461.2022.2115724","DOIUrl":"https://doi.org/10.1080/13640461.2022.2115724","url":null,"abstract":"ABSTRACT The existing sequential probability ratio under classical statistics is applied for testing the null hypothesis when all observations in the data are exact, precise and uncertain. In complex situations, the observations in the data may be imprecise and noted in the intervals. In this case, the existing sequential probability ratio cannot be applied for testing the hypothesis. This paper introduces the sequential probability ratio under neutrosophic statistics to deal with the data having imprecise and uncertain data. The statistic of the proposed test is introduced and applied for testing the hypothesis of alloy melting points data. From the alloy data analysis, simulation study and comparative study, it is concluded that the proposed neutrosophic sequential probability is adequate, informative and suitable to be applied in uncertainty.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49301896","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 : 2022-07-04DOI: 10.1080/13640461.2022.2099095
Guangyu Li, Wenming Jiang, Feng Guan, Zeyu Zhang, Junlong Wang, Z. Fan
ABSTRACT The effect of surface morphologies of Al insert, including smooth surface (SS), straight knurling (SK) and hatching knurling (HK) on interfacial microstructure, mechanical properties and fracture behaviour of Al/Mg bimetallic composites by a novel compound casting was studied in this work. The thicknesses of the interface layers of the SK-s and HK-s bimetallic composites, respectively, increased by 11.5% and 4.8% than that of the SS’s composite. The interfacial phase compositions were similar for all the bimetallic composites, mainly consisting of eutectic layer (EU) and intermetallic compound layer (IMC). Therein, the proportion of the EU layer in the entire interface layer for the SK’s and HK’s bimetallic composites was larger than that of the SS’s sample. The EU layer had a lower hardness than the IMC layer. The shear strengths of the SK’s and HK’s bimetallic composites increased by 34.2% and 50.2%, respectively, compared to that of the SS’s bimetallic composite.
{"title":"Interfacial characteristics, mechanical properties and fracture behaviour of Al/Mg bimetallic composites by compound casting with different morphologies of Al insert","authors":"Guangyu Li, Wenming Jiang, Feng Guan, Zeyu Zhang, Junlong Wang, Z. Fan","doi":"10.1080/13640461.2022.2099095","DOIUrl":"https://doi.org/10.1080/13640461.2022.2099095","url":null,"abstract":"ABSTRACT The effect of surface morphologies of Al insert, including smooth surface (SS), straight knurling (SK) and hatching knurling (HK) on interfacial microstructure, mechanical properties and fracture behaviour of Al/Mg bimetallic composites by a novel compound casting was studied in this work. The thicknesses of the interface layers of the SK-s and HK-s bimetallic composites, respectively, increased by 11.5% and 4.8% than that of the SS’s composite. The interfacial phase compositions were similar for all the bimetallic composites, mainly consisting of eutectic layer (EU) and intermetallic compound layer (IMC). Therein, the proportion of the EU layer in the entire interface layer for the SK’s and HK’s bimetallic composites was larger than that of the SS’s sample. The EU layer had a lower hardness than the IMC layer. The shear strengths of the SK’s and HK’s bimetallic composites increased by 34.2% and 50.2%, respectively, compared to that of the SS’s bimetallic composite.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44036826","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 : 2022-07-04DOI: 10.1080/13640461.2022.2104515
Hongjun Liu, Guoliang Su, Yaming Li
ABSTRACT An extrusion-based additive manufacturing process for investment casting shell mould is introduced in this paper. This process uses silica sol bauxite slurry to build shell mould. The shell mould is made up of thin walls around the casting cavity, and its additive manufacturing process is actually the building process of walls. The effect of process parameters on the dimensional accuracy of the bauxite shell mould was investigated. Taguchi’s design and Analysis of Variance (ANOVA) approach was used to evaluate and optimise the process parameters viz. wall thickness, wall height and filling pattern for dimensional accuracy. The results indicate the wall thickness, filling pattern and wall thickness are the most significant parameters affecting the dimensional accuracy in X, Y and Z directions, respectively. It is suggested that the wall thickness is set as 10 mm and the filling pattern is set as rectilinear for shell mould.
{"title":"Effect of wall structure on the dimensional accuracy of shell mould prepared by slurry extrusion-based additive manufacturing process","authors":"Hongjun Liu, Guoliang Su, Yaming Li","doi":"10.1080/13640461.2022.2104515","DOIUrl":"https://doi.org/10.1080/13640461.2022.2104515","url":null,"abstract":"ABSTRACT An extrusion-based additive manufacturing process for investment casting shell mould is introduced in this paper. This process uses silica sol bauxite slurry to build shell mould. The shell mould is made up of thin walls around the casting cavity, and its additive manufacturing process is actually the building process of walls. The effect of process parameters on the dimensional accuracy of the bauxite shell mould was investigated. Taguchi’s design and Analysis of Variance (ANOVA) approach was used to evaluate and optimise the process parameters viz. wall thickness, wall height and filling pattern for dimensional accuracy. The results indicate the wall thickness, filling pattern and wall thickness are the most significant parameters affecting the dimensional accuracy in X, Y and Z directions, respectively. It is suggested that the wall thickness is set as 10 mm and the filling pattern is set as rectilinear for shell mould.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46764770","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}
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