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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 2.6 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":"https://doi.org/10.1007/s11837-024-06854-2","url":null,"abstract":"<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>","PeriodicalId":605,"journal":{"name":"JOM","volume":"184 1","pages":""},"PeriodicalIF":2.6,"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

The 2023 TMS Annual Financial Report 2023 TMS 年度财务报告

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-09 DOI: 10.1007/s11837-024-06862-2

Brad Boyce, James J. Robinson

引用次数: 0

TMS Meeting Headlines TMS 会议头条

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-09 DOI: 10.1007/s11837-024-06865-z

引用次数: 0

Recent Book Releases from TMS TMS 近期发布的新书

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-09 DOI: 10.1007/s11837-024-06864-0

Kelly Zappas

引用次数: 0

Hybrid Modification of Microstructure and Tensile Properties of A319 Alloy by Heat Treatment and Be Addition 通过热处理和添加铍对 A319 合金的微观结构和拉伸性能进行混合改性

IF 2.6 4区材料科学

JOM Pub Date : 2024-09-09 DOI: 10.1007/s11837-024-06852-4

Mostafa Karamouz, Seyed Mohammad Jesmani

引用次数: 0

JOM Technical Topics JOM 技术专题

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-09 DOI: 10.1007/s11837-024-06857-z

引用次数: 0

Thermodynamic Modeling of Ilmenite Smelting and Impurity Distribution 钛铁矿冶炼和杂质分布的热力学模型

IF 2.1 4区材料科学

JOM Pub Date : 2024-09-09 DOI: 10.1007/s11837-024-06844-4

Elmira Moosavi-Khoonsari, Abbas Ahmadi Siahboumi, Sun Yong Kwon, Rodney Jones, Sina Mostaghel

{"title":"Thermodynamic Modeling of Ilmenite Smelting and Impurity Distribution","authors":"Elmira Moosavi-Khoonsari, Abbas Ahmadi Siahboumi, Sun Yong Kwon, Rodney Jones, Sina Mostaghel","doi":"10.1007/s11837-024-06844-4","DOIUrl":"10.1007/s11837-024-06844-4","url":null,"abstract":"<div><p>Pigment production utilizes TiO<sub>2</sub>-rich slags produced by the ilmenite smelting process which is sensitive to impurity levels in the titania slag. Thermodynamic analyses of ilmenite smelting were conducted to outline a path for process improvement. Specifically, the distribution of Ti and Fe, as well as a wide range of impurities, including V, Cr, Mn, Al, Si, Ca, Mg, P, and S, between the titania slag and molten iron were investigated. A comprehensive literature review was conducted to adequately ascertain the chemical compositions of ilmenite concentrates, which are among the most critical operational parameters in ilmenite smelting. Additionally, the quality requirements regarding impurity contents in the raw materials for TiO<sub>2</sub> pigment production were reviewed. The partition coefficients of elements between slag and metal determined as a function of process variables (i.e., oxygen partial pressure, temperature, and MgO/(Al<sub>2</sub>O<sub>3</sub> + SiO<sub>2</sub>) ratio) has been presented. Moreover, an in-depth analysis of the oxygen potentials during the ilmenite smelting process and the analysis of slag viscosity in corresponding process conditions have been shown. The analysis results are compared to the experimental data reported in the literature.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 11","pages":"6511 - 6533"},"PeriodicalIF":2.1,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199383","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