High Temperature Materials and Processes最新文献_第2页

Investigation of microstructure, machinability, and mechanical properties of new-generation hybrid lead-free brass alloys 新一代杂化无铅黄铜合金的显微组织、切削性能和力学性能研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0263

Özbey Semih, Artir Recep

{"title":"Investigation of microstructure, machinability, and mechanical properties of new-generation hybrid lead-free brass alloys","authors":"Özbey Semih, Artir Recep","doi":"10.1515/htmp-2022-0263","DOIUrl":"https://doi.org/10.1515/htmp-2022-0263","url":null,"abstract":"Abstract In this study, hybrid alloys were obtained by casting method with alloy elements and additive such as Si and MoS2, which can be used instead of lead, and compared with Ecobrass and free cutting brass samples used in the market in terms of microstructure, mechanical, and machinability properties. The microstructures of lead-free hybridized brass consists of alpha, beta, and intermetallic compound which were confirmed by the results of X-Ray Diffraction analysis and Scanning Electron Microscopy-Energy Dispersive Spectroscopy. The hardness values of the beta phase in the microstructure are between 180 and 220 Vickers hardness. It has been observed that increasing the amount of beta prime phase also increases the hardness. The machinability of samples was evaluated in terms of surface roughness and chip formation. Chips obtained from samples after machining process were categorized according to ISO 6385-G1 standard. Chip morphologies were examined under optic microscope and scanning electron microscope. The surface roughness value of samples with MoS2 additives was found to be the lowest due to its lubricity effect. Moreover, morphologies, distribution of phases, and intermetallic compounds in the microstructure are found to have a great impact on the machinability and ultimate tensile strength.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42995587","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}

引用次数: 0

Density and surface tension measurements of molten Al–Si based alloys 熔融铝硅基合金的密度和表面张力测量

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0286

Hiroyuki Fukuyama, Hideo Higashi, M. Adachi, Makoto Ohtsuka

引用次数: 0

Study on diffusion kinetics of chromium and nickel electrochemical co-deposition in a NaCl–KCl–NaF–Cr2O3–NiO molten salt 铬和镍在NaCl–KCl–NaF–Cr2O3–NiO熔盐中电化学共沉积的扩散动力学研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0276

Shixian Zhang, K. Hu, X. Zhao, J. Liang, Yungang Li

引用次数: 0

Temperature uniformity optimization with power-frequency coordinated variation in multi-source microwave based on sequential quadratic programming 基于顺序二次规划的多源微波工频协调变化温度均匀性优化

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0279

Biao Yang, Zemin Han, Cheng Cheng, Hao Gao, Zhaogang Wu

{"title":"Temperature uniformity optimization with power-frequency coordinated variation in multi-source microwave based on sequential quadratic programming","authors":"Biao Yang, Zemin Han, Cheng Cheng, Hao Gao, Zhaogang Wu","doi":"10.1515/htmp-2022-0279","DOIUrl":"https://doi.org/10.1515/htmp-2022-0279","url":null,"abstract":"Abstract The focus of this study is to regulate the variation in the input parameters of multiple microwave sources in a high-frequency multimode resonant heating system to achieve uniform heating. First, this study deeply expands the theoretical process of frequency change and proposes a frequency-shifting strategy with hot spot alternation to ensure that the temperature difference range of each hot spot does not continuously expand during the heating process. Then, a sequential quadratic programming algorithm is introduced to reconstruct the input power values to improve the heating efficiency according to the different microwave absorption efficiencies of the heated material at different frequencies. Finally, a numerical calculation model for multi-source microwave power-frequency cooperative heating is established based on the finite-element method, and the temperature uniformity index is effectively calculated. Numerical calculations show that the proposed method can improve the uniformity in single-material heating and multi-material heating cases by 56.8–94.3% and 44.4–76.6%, respectively, over that of fixed-frequency heating while achieving improved heating efficiency on the basis of frequency conversion.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44017604","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}

引用次数: 0

Heat management of LED-based Cu2O deposits on the optimal structure of heat sink 基于散热器最佳结构的LED基Cu2O沉积物的热管理

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0277

Congrong Wang, Chao Zhang, Qiduan Chen, Hui Lin, Xinting Sun, Jiahao Li, Mingder Jean

{"title":"Heat management of LED-based Cu2O deposits on the optimal structure of heat sink","authors":"Congrong Wang, Chao Zhang, Qiduan Chen, Hui Lin, Xinting Sun, Jiahao Li, Mingder Jean","doi":"10.1515/htmp-2022-0277","DOIUrl":"https://doi.org/10.1515/htmp-2022-0277","url":null,"abstract":"Abstract This report investigates the thermal performance of light-emitting diodes (LEDs) using a heat sink structure based on an optimized design and a sprayed cuprous oxide (Cu2O) coating. An orthogonal array of 18 aluminum plates with various heat-dissipated structures was created. The optimal junction temperature of the LED package is determined by using the signal-to-noise ratio (S/N) of the heat-dissipated structure based on Taguchi’s method as well as the heat dissipation coating. According to the analysis of variance, the most important factors that influence the junction temperature can be obtained as the depth of groove, the layout of holes, the layout of LEDs, and the number of Cu block. These significant factors constituted approximately 91.06% of the variation in the experiment. The results show that by optimizing the structure of the LED heat sink based on the heat-dissipated coating, the efficiency of the junction temperature is increased by 23.88%. Also, a gain of 1.30 dB corresponds to a 9.67% reduction in variance, which indicates the improvement through the optimal setting by 1.162 times of variance, showing good reproducibility. Overall, the coating is based on the optimized design of the structure of the heat sink that has good heat transfer capability, which can provide a good solution to the heat-dissipated problem of LED and further give guidance to the future development of LED.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48960890","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}

引用次数: 0

Soft sensor method for endpoint carbon content and temperature of BOF based on multi-cluster dynamic adaptive selection ensemble learning 基于多聚类动态自适应选择集成学习的转炉末端碳含量和温度软测量方法

4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0287

Bin Shao, Hui Liu, Fu-gang Chen

{"title":"Soft sensor method for endpoint carbon content and temperature of BOF based on multi-cluster dynamic adaptive selection ensemble learning","authors":"Bin Shao, Hui Liu, Fu-gang Chen","doi":"10.1515/htmp-2022-0287","DOIUrl":"https://doi.org/10.1515/htmp-2022-0287","url":null,"abstract":"Abstract The accurate control of the endpoint in converter steelmaking is of great significance and value for energy saving, emission reduction, and steel quality improvement. The key to endpoint control lies in accurately predicting the carbon content and temperature. Converter steelmaking is a dynamic process with a large fluctuation of samples, and traditional ensemble learning methods ignore the differences among the query samples and use all the sub-models to predict. The different performances of each sub-model lead to the performance degradation of ensemble learning. To address this issue, we propose a soft sensor method based on multi-cluster dynamic adaptive selection (MC-DAS) ensemble learning for converter steelmaking endpoint carbon content and temperature prediction. First, to ensure the diversity of the ensemble learning base model, we propose a clustering algorithm with different data partition characteristics to construct a pool of diverse base models. Second, a model adaptive selection strategy is proposed, which involves constructing diverse similarity regions for individual query samples and assessing the model’s performance in these regions to identify the most suitable model and weight combination for each respective query sample. Compared with the traditional ensemble learning method, the simulation results of actual converter steelmaking process data show that the prediction accuracy of carbon content within ±0.02% error range reaches 92.8%, and temperature within ±10°C error range reaches 91.6%.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135442917","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}

引用次数: 0

Cation-doping effects on the conductivities of the mayenite Ca₁₂Al₁₄O₃₃ 阳离子掺杂对马氏体Ca12Al14O33电导率的影响

4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0295

Xingping Song, Yaqiong Guo, Wenzhuo Chen, Keke Hou, Xiaoxu Duan, Jungu Xu

{"title":"Cation-doping effects on the conductivities of the mayenite Ca12Al14O33","authors":"Xingping Song, Yaqiong Guo, Wenzhuo Chen, Keke Hou, Xiaoxu Duan, Jungu Xu","doi":"10.1515/htmp-2022-0295","DOIUrl":"https://doi.org/10.1515/htmp-2022-0295","url":null,"abstract":"Abstract The mayenite Ca 12 Al 14 O 33 material, owing to its oxide ion conducting behavior and the low cost of raw materials, has the potential of being applied in solid oxide fuel cells as an electrolyte. However, suffering from the relatively low oxide ion conductivity, there is still a long way to go for its practical application. To enhance the oxide ion conduction in Ca 12 Al 14 O 33 , many efforts have been endowed to this from different research groups but hardly succeeded. In this work, the Ca 12 Al 14 O 33 -based materials with Y, In, and Cu-doping on the Ca or Al sites were fabricated through a traditional solid-state reaction method (for Y-doping on Ca and Cu-doping on Al) or a glass-crystallization method (for In-doping on Al), with their electrical conductivities being studied. The results revealed that the solid solution regions of Ca 12− x Y x Al 14 O 33+ δ , Ca 12 Al 14− x In x O 33 , and Ca 12 Al 14− x Cu x O 33− δ were 0 ≤ x ≤ 0.15, 0 ≤ x ≤ 0.1, and 0 ≤ x ≤ 0.3, respectively. The electrical conductivities of all these doped materials were investigated.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135610967","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}

引用次数: 0

Investigation of the liquidus temperature calculation method for medium manganese steel 中锰钢液相温度计算方法的探讨

4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0285

Li Min, Liu Hongbo, Xie Rongyuan, Che Xiaorui, Liu Ying, Xu Hao, Zhang Caidong, Tian Zhiqiang

引用次数: 0

SELECTION OF DUST PARTICLES IN A STRIATION IN GLOW DISCHARGE IN INERT GASES WITH DIFFERENT IONIZATION POTENTIALS 不同电离势惰性气体辉光放电条纹中粉尘颗粒的选择

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1615/hightempmatproc.2023047043

L. Novikov, E. Dzlieva, M. Golubev, S. Pavlov, M. Gasilov, V. Karasev

引用次数: 0

Study on the cladding path during the solidification process of multi-layer cladding of large steel ingots 大型钢锭多层熔覆凝固过程中熔覆路径的研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0267

Li Yi-hong, Ni Jin-Yu, Zhao Yu-kun, He Yi-bo, Ren Zhi-feng, Chen Hui-qin

{"title":"Study on the cladding path during the solidification process of multi-layer cladding of large steel ingots","authors":"Li Yi-hong, Ni Jin-Yu, Zhao Yu-kun, He Yi-bo, Ren Zhi-feng, Chen Hui-qin","doi":"10.1515/htmp-2022-0267","DOIUrl":"https://doi.org/10.1515/htmp-2022-0267","url":null,"abstract":"Abstract Aiming at the quality problems such as segregation, porosity and shrinkage cavities that are difficult to eliminate due to the size effect of large die-cast steel ingots as large forging blanks, the idea of layered casting of large steel ingots is proposed. The transient heat transfer process and cladding path of the ingot core and cladding layer under different molten steel casting temperatures, different ingot core diameters and different ingot core preheating temperatures were studied by combining numerical simulation and thermal experiments. The research results show that the cladding path has a certain functional relationship with the diameter of the ingot core and the preheating temperature of the ingot core. Obviously, the interfacial melting rate can be significantly improved. The thermal scaling experiment was carried out on the cladding path under the condition of a casting temperature of 1,560°C and no preheating of the ingot core. The microhardness of the interface is higher than that of the clad steel ingot, and the metallurgical bond of the interface is good.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41342364","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}

引用次数: 0