Journal of advanced manufacturing and processing最新文献

{"title":"A Retrospective Analysis of Circular Economy and Industrial Decarbonization Metrics in the United States, 1998–2022","authors":"Heather P. H. Liddell,&nbsp;Brian M. Ray,&nbsp;Joseph W. Cresko","doi":"10.1002/amp2.70013","DOIUrl":"https://doi.org/10.1002/amp2.70013","url":null,"abstract":"<p>While technical strategies for industrial decarbonization can be synergistic with those supporting a circular economy, metrics for decarbonization and circularity are distinct (and not necessarily correlated). We analyze time-series data for the period 1998–2022 synthesized from multiple U.S. governmental datasets, including new input/output data from the Bureau of Economic Analysis's 2023 Comprehensive Update of the National Economic Accounts, to take a “pulse check” on decarbonization and circularity metrics in the United States. This includes a retrospective analysis of trends in industrial emissions intensity over time (based on historical Manufacturing Energy Consumption Survey data) and correlations with salient economic metrics for 18 U.S. manufacturing industries. Some industries are reducing their emissions much faster than others, and we show that this pace of change—at least for certain industries—has to do with industry growth rates as well as predictable lock-in effects related to investments in capital assets. The analysis is extended to an initial exploration of interconnectedness between industry growth, material flows, and indicators relevant to the circular economy. We leverage data from economic input–output tables to assess the intensiveness of virgin material use in U.S. manufacturing supply chains, and comment on the usefulness of these measures as high-level indicators for circularity and circularity potential.</p>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Challenges in Tracking Waste Reduction Performance Improvement in Manufacturing Plants","authors":"Subodh Chaudhari,&nbsp;Alexandra Botts,&nbsp;Sachin Nimbalkar,&nbsp;Cory Tatarzyn,&nbsp;Tina Burry,&nbsp;Thomas Wenning","doi":"10.1002/amp2.70009","DOIUrl":"https://doi.org/10.1002/amp2.70009","url":null,"abstract":"<div>\u0000 \u0000 <p>The recently released <i>Circularity Gap Report 2023</i> by the Circle Economy Foundation states that the circularity score for the global economy is declining. The US Environmental Protection Agency (EPA) tracked municipal solid waste from 1960 to 2018 and found that 50% of the waste was destined for landfills. EPA estimates that US industry is responsible for 2.7 Gt of solid nonhazardous waste annually in the US mostly linear economy model. The circular economy framework aims to decouple economic value generation from the extraction of virgin materials from nature. The linear model of material extraction and disposal at the end of life is highly unsustainable. Manufacturing companies are adopting ambitious waste reduction targets to achieve sustainability. Through the Better Plants program, US DOE has established the Waste Reduction Network, which offers technical assistance to partners to achieve their ambitious waste reduction goals. Basic requirements of establishing a target include identifying a baseline, quantifying waste performance, and measuring progress over time. One problem faced by industry is unstandardized metrics for quantifying waste performance that may not be well suited to demonstrate progress. This paper studies traditional methods used to measure waste performance and highlights advantages, disadvantages, and limitations of each method. It also examines the suitability of applying the methods in different manufacturing circumstances. Finally, the paper presents a case study of a large manufacturer that faced inconsistencies in its tracked measurement metric. A solution was proposed and implemented to alter the methodology to enable more accurate waste performance tracking against a baseline.</p>\u0000 </div>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Global Material Flow of Macro- and Microplastics to Support a Circular Economy","authors":"Madeline C. Addis,&nbsp;Lydia Allison,&nbsp;VeeAnder Mealing,&nbsp;Anna G. Williams,&nbsp;Anne Marie Mozrall,&nbsp;Amy E. Landis","doi":"10.1002/amp2.70015","DOIUrl":"https://doi.org/10.1002/amp2.70015","url":null,"abstract":"<div>\u0000 \u0000 <p>Plastics are one of the most widely consumed materials around the world, and its impact on our ecosystems is undeniable. Initiatives to reduce plastic waste have gained momentum in recent years, but the focus areas of such initiatives do not always align with significant positive impacts. This presentation demonstrates a material flow analysis (MFA) aimed at quantifying the global flow of plastics, from production to end of life, ultimately identifying where plastic reduction efforts can be most impactful. On a global scale, specific data on plastic production and material flow is lacking, so calculations relied heavily on data published in the United Nations' Mapping Global Plastics Report, based on the year 2015. The MFA was conducted with emphasis on end of life and flows lost to the environment, including macro- and microplastics. Across the global MFA, results show packaging was the largest individual industry consumer of plastics. Categories designated as “other” should be investigated further due to their substantial presence in the material flow. Plastics lost to the environment made up about 2% of the total mass, but that 2% equated to over 8 million metric tons. These lost plastics stem from various sources, making the issue difficult to tackle, but addressing this loss is important, nonetheless. Reducing demand for plastic production through decreased use is an obvious approach to minimizing waste and pollution, and this study provides insight about which plastics pose the greatest threat while also identifying current data gaps, ultimately guiding where future efforts should be focused.</p>\u0000 </div>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Systems Analysis and Optimization of Circular PET Packaging Supply Chains in the United States: Environmental and Socioeconomic Impacts","authors":"Utkarsh S. Chaudhari,&nbsp;David W. Watkins,&nbsp;Robert M. Handler,&nbsp;Barbara K. Reck,&nbsp;Anne T. Johnson,&nbsp;Tasmin Hossain,&nbsp;Damon S. Hartley,&nbsp;Vicki S. Thompson,&nbsp;Alejandra Peralta,&nbsp;David R. Shonnard","doi":"10.1002/amp2.70008","DOIUrl":"https://doi.org/10.1002/amp2.70008","url":null,"abstract":"<div>\u0000 \u0000 <p>Many actions are underway at global, national, and local levels to address the plastic waste problem and transition toward a circular economy of plastics. Studies evaluating environmental and socioeconomic impacts of such a transition are lacking. The purpose of this study is to conduct a national systems analysis of polyethylene terephthalate (PET) packaging supply chains in the United States. Material flow data was combined with environmental and socioeconomic indicators to evaluate and compare the sustainability of the linear PET packaging supply chain, current (2019) supply chain, and possible future circular supply chain options in the United States. Environmentally optimal circular US PET packaging material flows showed 31% and 38% savings of GHG emissions and energy demand, respectively, with a circularity of 77% when compared with a linear supply chain. Additionally, the environmentally optimal system showed higher employment (29%) and wages (31%) than a linear system, but with a 5% decrease in revenue generation. A socioeconomically optimal circular PET supply chain showed increased employment (by 52%), wages (by 67%), and revenues (by 1%), with a circularity of 59% when compared with the linear system. However, it showed 14% higher GHG emissions than a linear system, indicating a trade-off between environmentally and socioeconomically optimal circular PET packaging systems. Overall, linear-to-circular material flow transition may not necessarily lead to increased revenues and decreased environmental impacts of the entire system, but it does benefit society due to increased employment and wages. Future systems analysis work should focus on improving data quality for environmental and socioeconomic dimensions.</p>\u0000 </div>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toward Material Circularity and Manufacturing Sustainability in the Automotive Industry","authors":"Alan A. Luo,&nbsp;Diran Apelian,&nbsp;Alan I. Taub","doi":"10.1002/amp2.70017","DOIUrl":"https://doi.org/10.1002/amp2.70017","url":null,"abstract":"<p>This paper reviews technologies being developed toward material circularity and manufacturing sustainability in the automotive industry; aluminum sustainability is used herein as an exemplar. While aluminum is increasingly used for lightweighting applications in the transportation industries to reduce energy consumption and carbon footprint, primary production of aluminum is energy-intensive with significant CO₂ emissions. However, remelting aluminum scrap only uses ~5% of the energy, resulting in significantly reduced emissions required to produce primary aluminum from bauxite ore. The wide use of recycled aluminum for transportation applications will ensure the sustainability of the supply chain. Another example is the use of renewable wood materials such as the recently developed “super wood” which is a densified natural wood with similar mechanical properties to metallic materials. For manufacturing processes, the development and evolution of energy-efficient large thin-wall die casting (also called mega/giga casting) will enhance the sustainability of automotive manufacturing. Alternative energy vehicles tend to have more simplified body structures, enabling the use of large and consolidated castings which significantly reduce welding, joining, and assembly operations. Reclaiming some of the high-value battery materials from electric vehicles is challenging. A patented “Hydro-to-Cathode” direct precursor synthesis process can leach out impurities, keeping the valuable metals in solution and eliminating multiple steps in the recycling flow. Additional technology advances are required to reclaim other materials. Ultimately, the combination of recycled/renewable materials and energy-efficient manufacturing processes will drive the automotive industry toward circularity and sustainability.</p>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental Management by Recycling of Bauxite Residue","authors":"Himanshu Tanvar,&nbsp;Brajendra Mishra","doi":"10.1002/amp2.70010","DOIUrl":"https://doi.org/10.1002/amp2.70010","url":null,"abstract":"<div>\u0000 \u0000 <p>Bauxite residue is an industrial by-product generated during alumina production from bauxite ore through the Bayer process. The worldwide stockpiles of bauxite residue are expected to reach 10 billion tons by 2050 if not processed effectively. Limited industrial-scale processing (3%–4%) of bauxite residue is mainly due to complex physical and chemical characteristics. High alkalinity and multiple elements make the recycling process complicated and expensive. The following work presents a hydrometallurgical process for effectively recycling bauxite residue to recover high-purity metal oxide products, including magnetite, alumina, titanium dioxide, and scandium oxide. Bauxite residue is first neutralized after leaching with mild hydrochloric acid, followed by the leaching of iron with oxalic acid and photochemical reduction of leach liquor to obtain ferrous oxalate precipitate, which is further converted to high-purity magnetite. A pyrometallurgical method is also discussed based on smelting for pig iron extraction and subsequent slag processing for value recovery. A comparative analysis of hydro and pyrometallurgical processes is carried out to highlight the key differences and potential for large-scale applications.</p>\u0000 </div>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of Transformable Multiple Impeller (AM Impeller) for Highly Viscous Fluids","authors":"Haruki Furukawa,&nbsp;Shigenobu Inoue,&nbsp;Takeru Tanaka,&nbsp;Yoshihito Kato,&nbsp;Shinsuke Asayama,&nbsp;Norihiro Morikawa,&nbsp;Seung-Tae Koh,&nbsp;Hyun-Gi Koh","doi":"10.1002/amp2.70006","DOIUrl":"https://doi.org/10.1002/amp2.70006","url":null,"abstract":"<p>Mixing performance in a laminar flow with a mixing Reynolds number less than 10 is greatly affected by the geometry of the impeller blades, and how to generate axial flow is important. The authors developed a new AM impeller with a low production cost by combining simple pitched paddle impellers in multiple stages. In this study, we attempted to further optimize the shape of the AM impeller by adding an assisting blade. Mixing performance was compared between Newtonian and non-Newtonian fluids. The mixing performance of the multiple-pitched-paddle-impeller was improved by the assisting blades, but the partial helical ribbon impeller was ineffective, and the most efficient AM impeller was the partial helical ribbon impeller without assisting blades, so further impeller simplification was attempted and a modified new AM impeller with the most efficient and simple structure was developed, because the most efficient AM impeller was a partial helical ribbon impeller without assisting blades.</p>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative evaluation of the enhanced PLS-Tree algorithm with multiple latent score vectors","authors":"Shyam Panjwani,&nbsp;Alice Almazan,&nbsp;Hao Wei,&nbsp;Konstantinos Spetsieris","doi":"10.1002/amp2.70004","DOIUrl":"https://doi.org/10.1002/amp2.70004","url":null,"abstract":"<p>Multicollinearity and heterogeneity are prevalent challenges in the analysis of process industry datasets, necessitating algorithms capable of addressing both simultaneously. The partial least squares (PLS)-Tree algorithm, which integrates PLS regression with decision tree methodologies, stands out by concurrently addressing data heterogeneity and improving predictive performance. However, the PLS-Tree algorithm remains underexplored compared to other machine learning approaches. This study delves into the intricacies of the PLS-Tree algorithm, utilizing synthetic data that mirrors the complexity of real-world process industry scenarios characterized by high collinearity and clustering. This paper further enhances the original PLS-Tree framework by introducing multiple latent score vectors, with the objective of refining the clustering process and boosting predictive accuracy beyond that of standard PLS and regression tree algorithms. Additionally, a comparative analysis is presented, evaluating the performance of the enhanced PLS-Tree against regular PLS and regression tree, highlighting its potential for sophisticated data analysis in the process industries.</p>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microwave-assisted poly(D,L-lactide) synthesis in toluene and tetrahydrofuran","authors":"Nicolas A. Patience,&nbsp;Halie Mei Jensen,&nbsp;Xavier Banquy,&nbsp;Daria C. Boffito","doi":"10.1002/amp2.70001","DOIUrl":"https://doi.org/10.1002/amp2.70001","url":null,"abstract":"<p>Poly(<span>d</span>,<span>l</span>-lactide) is a biocompatible and biodegradable polymer with applications in the biomedical field (drug delivery, implants) and packaging. Conventional synthesis with stannous octoate is slow (&gt;4 h) and can climb to over 30 h. In order to reduce reaction times, we developed a microwave reactor process to ring-open polymerize <span>d</span>,<span>l</span>-lactide to form poly(<span>d</span>,<span>l</span>-lactide) in the presence of stannous octoate and an initiator, benzyl alcohol. We evaluated the suitability of toluene and tetrahydrofuran as solvents at 130, 150, and 170°C for the polymerization. Their respective dielectric loss <span></span><math>\u0000 <mrow>\u0000 <mfenced>\u0000 <mi>ε</mi>\u0000 <mo>″</mo>\u0000 </mfenced>\u0000 </mrow></math> values are 0.1 and 0.35. Compounds with larger dielectric loss values are better at converting microwave energy to heat. The microwave's power input peaked at 420 W to reach 170°C with toluene, whereas with tetrahydrofuran the peak was 330 W; afterwards, the power input to maintain that temperature was 10 W for both solvents. A reaction in toluene at 170°C after 1 h produced poly(<span>d</span>,<span>l</span>-lactide) with a molecular weight of 31 kDa and a dispersity index of 1.5. In tetrahydrofuran, at the same temperature, the molecular weight peaked at 11 kDa after 4 h with a dispersity index of 1.2. Moreover, in the absence of microwaves the polymerization does not occur. Tetrahydrofuran is hygroscopic and water cleaves poly(<span>d</span>,<span>l</span>-lactide) chains resulting in a lower molecular weight despite the longer reaction time and larger dielectric loss compared to toluene, a water immiscible solvent.</p>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Powder bed fusion of β-Ti-Nb-based ternary and quaternary titanium alloys for orthopedic implants: A review","authors":"Dagim Asegid Tirfe,&nbsp;Temesgen Batu,&nbsp;Meseret Ewnetu,&nbsp;Eaba Beyene,&nbsp;Abraham Debebe Woldeyohannes","doi":"10.1002/amp2.70002","DOIUrl":"https://doi.org/10.1002/amp2.70002","url":null,"abstract":"<p>This review presents the transformative potential of powder bed fusion (PBF) in manufacturing orthopedic implants, with a particular focus on β-Ti-Nb-based ternary and quaternary titanium alloys. These alloys, such as Ti–18Zr–14Nb, Ti–29Nb–13Ta–4.6Zr, and Ti–35Nb–7Zr–5Ta (TNZT), offer significant advantages over conventional materials like Co–Cr alloys and Ti–6Al–4V due to their lower Young's modulus, excellent biocompatibility, and reduced stress shielding effects. The review covers the period from 2015 to September 2024 and highlights advancements in PBF-fabricated β-Ti alloys, emphasizing their potential to improve implant longevity and patient outcomes by minimizing the risks of implant failure associated with conventional materials.</p>","PeriodicalId":87290,"journal":{"name":"Journal of advanced manufacturing and processing","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/amp2.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}