IF 2.6 4区材料科学

JOM Pub Date : 2024-09-16 DOI: 10.1007/s11837-024-06850-6

Chih-Chieh Mo, Ching-Chien Huang

引用次数: 0

Carbon-Coating Co-Doped α-Ni(OH)2 for High-Performance Supercapacitors 用于高性能超级电容器的碳涂层共掺杂α-Ni(OH)2

IF 2.6 4区材料科学

JOM Pub Date : 2024-09-16 DOI: 10.1007/s11837-024-06868-w

Miao Wang, Peng Zheng

引用次数: 0

Effects on Mechanical and Physical Properties of Ta Element Addition to Ti-6Al-7Nb Alloy 在 Ti-6Al-7Nb 合金中添加 Ta 元素对机械和物理特性的影响

IF 2.6 4区材料科学

JOM Pub Date : 2024-09-16 DOI: 10.1007/s11837-024-06843-5

Ugur Caligulu, Hulya Durmus, Haluk Kejanli, Ali Riza Keskinkilic, Esra Balci

引用次数: 0

Uncovering the Key Features of Aluminum Flows and Stocks in Pakistan During 2005–2020 揭示 2005-2020 年巴基斯坦铝流动和库存的主要特征

IF 2.6 4区材料科学

JOM Pub Date : 2024-09-12 DOI: 10.1007/s11837-024-06849-z

Nida Rabab, Yong Geng, Guimei Zhao, Junting Shi

{"title":"Uncovering the Key Features of Aluminum Flows and Stocks in Pakistan During 2005–2020","authors":"Nida Rabab, Yong Geng, Guimei Zhao, Junting Shi","doi":"10.1007/s11837-024-06849-z","DOIUrl":"https://doi.org/10.1007/s11837-024-06849-z","url":null,"abstract":"<p>Aluminum has unique physical and chemical properties, such as light weight, corrosion resistance, and recyclability. Therefore, it has been widely used in various industrial sectors. This study employs a material flow analysis (MFA) method to comprehensively examine aluminum metabolism in Pakistan along its entire life cycle. By investigating aluminum flows and stocks from 2005 to 2020, this study provides insightful information for improving the overall aluminum resource efficiency. Our results show that Pakistan significantly relies on importing bauxite production to support its domestic needs, with an average annual amount of 218 kilotons (kt). Such imports peaked at 222 kt in 2016, but fell to below 75 kt in both 2019 and 2020. The overall import dependence rate reached 85.93%, indicating Pakistan’s heavy reliance on importing aluminum resource. Unfortunately, Pakistan’s aluminum recycling rate is only 30%, highlighting its inefficient recycling efforts. To address these challenges, this study proposes several suggestions, including the development of advanced recycling facilities, the introduction of incentives to boost recycling efforts, and the preparation of circular economy policies. These initiatives are crucial for improving the overall aluminum resource efficiency, reducing the associated environmental impacts, and advancing Pakistan's sustainability goals.</p>","PeriodicalId":605,"journal":{"name":"JOM","volume":"14 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199382","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

Decomposition of Mixed Rare Earth Concentrates Using Solid KOH 使用固体 KOH 分解混合稀土精矿

IF 2.6 4区材料科学

JOM Pub Date : 2024-09-12 DOI: 10.1007/s11837-024-06802-0

Chuxuan Deng, Xiaowei Zhang, Jianfei Li, Yanhong Hu, Zhaogang Liu, Jinxiu Wu, Xiaodong Wang, Shuang Wang

{"title":"Decomposition of Mixed Rare Earth Concentrates Using Solid KOH","authors":"Chuxuan Deng, Xiaowei Zhang, Jianfei Li, Yanhong Hu, Zhaogang Liu, Jinxiu Wu, Xiaodong Wang, Shuang Wang","doi":"10.1007/s11837-024-06802-0","DOIUrl":"https://doi.org/10.1007/s11837-024-06802-0","url":null,"abstract":"<p>The Bayan Obo mixed rare earth concentrate, characterized by its complex composition and difficult-to-decompose bastnaesite, poses significant industrial processing challenges. Traditional methods using sulfuric acid and sodium hydroxide lead to environmental pollution and resource wastage. This article introduces a novel decomposition method using solid potassium hydroxide (KOH). Thermodynamic calculations indicate that reactions with KOH are spontaneous between 298 K and 573 K, making the decomposition of rare earth minerals and fluorite feasible. Studies using TG-DSC, XRD, SEM-EDS, and FT-IR reveal that, under the action of KOH, REFCO<sub>3</sub> is decomposed into RE(OH)<sub>3</sub>. As the temperature increases, RE(OH)<sub>3</sub> decomposes into rare earth oxides, and REPO<sub>4</sub> reacts with KOH to form K<sub>3</sub>PO<sub>4</sub>. Under the conditions of roasting of 240°C, 60 min, and solid–alkali ratio of 1:1, a rare earth decomposition rate of over 96% has been achieved. Decomposition rates for phosphorus and fluorine reached 75.61% and 95.74%, respectively. The kinetic results of the roasting reaction were: <i>E</i> = 21.7 kJ mol<sup>−1</sup> and <i>n</i> = 2.12 between 180°C and 250°C. This method achieves high recovery rates for fluorine and phosphorus, and enables direct extraction of potassium, phosphorus, and other elements from waste solutions for fertilizer production. These aspects underscore its significance in environmental protection and comprehensive utilization.</p>","PeriodicalId":605,"journal":{"name":"JOM","volume":"17 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199381","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

TMS Member News TMS 会员新闻

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-11 DOI: 10.1007/s11837-024-06858-y

引用次数: 0

Your 2025 TMS Membership: What’s New for the Year Ahead? 您的 2025 TMS 会员资格：来年有什么新变化？

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-11 DOI: 10.1007/s11837-024-06861-3

Srini Chada

引用次数: 0

In Situ, Parallel Monitoring of Relative Temperature, Material Emission, and Laser Reflection in Powder-Blown Directed Energy Deposition 对粉末喷射定向能量沉积过程中的相对温度、材料发射和激光反射进行原位并行监测

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-10 DOI: 10.1007/s11837-024-06837-3

Samantha Webster, Jihoon Jeong, Rujing Zha, Shuheng Liao, Alberto Castro, Lars Jacquemetton, Darren Beckett, Kornel Ehmann, Jian Cao

{"title":"In Situ, Parallel Monitoring of Relative Temperature, Material Emission, and Laser Reflection in Powder-Blown Directed Energy Deposition","authors":"Samantha Webster, Jihoon Jeong, Rujing Zha, Shuheng Liao, Alberto Castro, Lars Jacquemetton, Darren Beckett, Kornel Ehmann, Jian Cao","doi":"10.1007/s11837-024-06837-3","DOIUrl":"10.1007/s11837-024-06837-3","url":null,"abstract":"<div><p>In situ monitoring is critical for developing new control methods, advanced materials and toolpath planning strategies in laser beam directed energy deposition (DED-LB). Coaxial melt pool monitoring has typically been performed with cameras [e.g., infrared, two-color pyrometer, charge-coupled device, or complementary metal-oxide semiconductor], which have focused on melt pool morphology and temperature distribution. While these techniques capture critical deposition information, they do not capture other important phenomena such as the unique coupling between the laser and melt pool, which limits the design and generality of open-loop and closed-loop process control. We establish in situ, parallel signals by monitoring multiple process phenomena at the same time through different wavelength bands and thermal correlation. Increased laser coupling was observed using in situ, parallel monitoring, where lower reflectivity/higher absorption of the laser light within a vapor depression led to an increase in thermal emission in the visible region. Ultimately, a relationship between each change in process parameter and the relative absorption of the laser was established. In situ monitoring of the laser coupling phenomena not only provides insight into material processing conditions but will also enable more complex control in DED-LB processes.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 11","pages":"6615 - 6638"},"PeriodicalIF":2.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225735","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

Optimizing Microstructure and Mechanical Properties of Cold-Rolled Medium-Mn Steel Through Intercritical Annealing and Warm Rolling 通过临界退火和热轧优化冷轧中锰钢的微观结构和机械性能

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-10 DOI: 10.1007/s11837-024-06854-2

Ranjit Kumar, Avanish Kumar Chandan, Gaurav Kumar Bansal, Sumit K. Sharma, Kirty Madhavi

{"title":"Optimizing Microstructure and Mechanical Properties of Cold-Rolled Medium-Mn Steel Through Intercritical Annealing and Warm Rolling","authors":"Ranjit Kumar, Avanish Kumar Chandan, Gaurav Kumar Bansal, Sumit K. Sharma, Kirty Madhavi","doi":"10.1007/s11837-024-06854-2","DOIUrl":"10.1007/s11837-024-06854-2","url":null,"abstract":"<div><p>This study investigates the influence of intercritical annealing (IA) and warm-rolling (WR) parameters on the microstructure and mechanical properties of a cold-rolled medium-Mn steel (CR-MMnS). IA was conducted between temperatures of 620°C and 740°C, while warm rolling was carried out after IA to improve mechanical properties. To calculate the parameters for the IA and IA + WR treatments, thermodynamic model calculations were conducted using the ThermoCalc database, TCFE9. The microstructural analysis of CR-MMnS revealed that IA promoted the formation of globular morphology of ferrite/martensite and retained austenite along with the formation of carbides, while warm rolling resulted in refined grain sizes and the breakup of coarser carbides with lamellar morphology. Mechanical testing demonstrated that the combination of intercritical annealing and warm rolling (IA + WR) achieved improved tensile strength and yield strength compared to the individual intercritical annealing. The findings provide valuable insights into the optimization of intercritical annealing and warm-rolling parameters for enhancing microstructure and mechanical properties in medium-Mn steel. This research contributes to the development of advanced steel materials with enhanced performance for various engineering applications.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 12","pages":"7135 - 7145"},"PeriodicalIF":2.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225727","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

Effect of Heat Treatment on Mechanical Properties of 17-4 PH Stainless Steel Gyroid Lattice Structures Manufactured by Selective Laser Melting and a Study on Weight Reduction Methods 热处理对通过选择性激光熔化制造的 17-4 PH 不锈钢陀螺格构机械性能的影响以及减重方法研究

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-09 DOI: 10.1007/s11837-024-06821-x

Sreekanth Asapu, Ravi Kumar Y

{"title":"Effect of Heat Treatment on Mechanical Properties of 17-4 PH Stainless Steel Gyroid Lattice Structures Manufactured by Selective Laser Melting and a Study on Weight Reduction Methods","authors":"Sreekanth Asapu, Ravi Kumar Y","doi":"10.1007/s11837-024-06821-x","DOIUrl":"10.1007/s11837-024-06821-x","url":null,"abstract":"<div><p>Weight reduction is critical in various engineering applications, as it directly impacts performance, efficiency, and overall cost-effectiveness. Topology optimization (TO) and lattice structures are effective methods for weight reduction, and such intricate designs are typically produced by additive manufacturing (AM). This research article presents an experimental investigation on the mechanical properties of uniform and gradient gyroid lattice structures manufactured through selective laser melting (SLM) using 17-4 precipitated hardening (PH) stainless steel (SS) material. The study focuses on analysing the effects of three different heat treatment processes on the compressive mechanical behaviour of the lattice structures using stress–strain graphs. Uniform lattices demonstrate superior mechanical properties by ensuring consistent structure stiffness and strength. Heat treatments decreased the grain size, resulting in increased yield strength for uniform and gradient structures compared to as-built samples. From the results, as-built samples showed higher plateau stress and energy absorption due to lower martensite content, leading to increased stress in the plateau region. Furthermore, different weight reduction methods such as TO, lattices, and the combination of TO and lattice can be studied and explained using an anchor bracket by utilising uniform and gradient-type sandwich lattice.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 11","pages":"6692 - 6708"},"PeriodicalIF":2.1,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-024-06821-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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