Journal of Thermal Analysis and Calorimetry最新文献

{"title":"Greener reprocessing of medical plastic waste through fuel conversion and enhancing its energy and environmental metrics along with economic assessment","authors":"Suresh Vellaiyan","doi":"10.1007/s10973-024-13971-2","DOIUrl":"10.1007/s10973-024-13971-2","url":null,"abstract":"<div><p>The epidemic has driven a surge in demand for plastic-based personal protective equipment (PPE) kits in healthcare, creating environmental and health risks from discarded PPE waste. This study addresses these issues by converting PPE robes into energy through pyrolysis, producing plastic pyrolysis fuel (PPF) for use in diesel engines. The physicochemical properties of PPF were analyzed, and PPF-diesel blends (10%, 20%, and 30%) were tested alongside neat diesel fuel (NDF) in a single-cylinder diesel engine under varied brake-mean effective pressure (BMEP) conditions. Results show that adding PPF reduces in-cylinder pressure (ICP), heat release rate (HRR), and brake thermal efficiency (BTE). A 30% PPF blend increases brake-specific fuel consumption (BSFC), hydrocarbon (HC), carbon monoxide (CO), and smoke emissions by 13.8%, 23.3%, 10.5%, and 4.5%, respectively, while reducing NOx emissions by 5.5%. To enhance combustion performance and emissions, a water emulsion was added to the NDF + PPF mixture, incorporating 5% and 10% water with 30% PPF. This approach improved engine performance, increasing BTE by 10.8% and reducing HC, CO, NOx, and smoke emissions by 22.3%, 15.9%, 10.3%, and 6.2%, respectively. Cost–benefit analysis shows that water-emulsified PPF-diesel fuel achieves comparable engine performance to NDF while reducing operating costs by 19.1%.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1585 - 1598"},"PeriodicalIF":3.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of heat transfer in bi-directional flow of sodium alginate-based ternary hybrid nanofluid over an extending heated surface with velocity slip conditions","authors":"Showkat Ahmad Lone,&nbsp;Laila A. AL-Essa,&nbsp;Fuad S. Alduais,&nbsp;Afrah Al-Bossly,&nbsp;Abdullah Dawar,&nbsp;Anwar Saeed","doi":"10.1007/s10973-024-13872-4","DOIUrl":"10.1007/s10973-024-13872-4","url":null,"abstract":"<div><p>The analysis of three-dimensional trihybrid nanofluid flow on a stretchable sheet using variable porous medium and diverse nanoparticles (Cu, CuO, Al₂O₃) in a sodium alginate base fluid has many applications in augmenting thermal transfer processes across numerous engineering systems like optimization of thermal management in electronic components, industrial heat exchangers and energy conversion systems. The inclusion of velocity slips and convective heat transfer has many applications in advanced thermal systems in aerospace, renewable energy and automotive sectors efficient heat dissipation in critical. Therefore, in this article, three-dimensional flows of a ternary hybrid nanofluid flow on a stretchable sheet using variable permeable medium. The velocity slip conditions along with convective thermal transportation are also considered in this article along with thermal radiation and heat source. The present analysis is endorsed with the earlier published results by which the validation of present model and applied technique are confirmed. The results of the current investigation demonstrate that a higher magnetic factor boosted the thermal distribution, while reducing the primary and secondary velocity distributions. A higher Casson factor improved both the primary and secondary velocities. Higher velocity slip factors lowered the primary and secondary velocities. The increased thermal Biot number, thermal radiation parameter improved thermal dispersion. The greater the thermal Biot number, radiative and heat source factors, the higher the thermal transfer rate.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1545 - 1556"},"PeriodicalIF":3.0,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical exploration of thermal dispersion effect on non-Darcian flow of nanofluid along convectively heated truncated cone","authors":"Venkatarao Chukka,&nbsp;Naveen Padigepati,&nbsp;RamReddy Chitteti","doi":"10.1007/s10973-024-13870-6","DOIUrl":"10.1007/s10973-024-13870-6","url":null,"abstract":"<div><p>The present article examines the mixed convective flow of a nanofluid across a truncated cone immersed in a porous media, considering the convective thermal condition (CTC) and the thermal dispersion (TD) effect. The mathematical framework utilized in this investigation is based on Bungiorno’s nanofluid model. Given the intricacy of this flow problem, similar solutions are not applicable. So, non-similar transformations are chosen to non-dimensionalize the equations that govern the nanofluid flow. An efficient Chebyshev spectral collocation method (CSCM) is deployed post-local linearization to tackle the resultant linearized partial differential equations system. By evaluating residual norms, the applied numerical technique CSCM is demonstrated in terms of validity and convergence. The study also examines the impact of flow-influenced factors on temperature, velocity, volume fraction, heat transfer rate, nanoparticle mass transfer rate, streamlines, and isotherms. The heat transfer rate increases with larger thermal dispersion factors under assisting and opposing flow circumstances. This numerical study helps to understand how flow dynamics and thermal behaviour around the truncated cone are affected under the influence of nanofluid flow for different flow conditions. A detailed discussion of the present problems provides guidelines for future experimental and computational research to develop an improved system design when applied to heat and mass transfer industries.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1831 - 1849"},"PeriodicalIF":3.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance evaluation of various training functions using ANN to predict the thermal conductivity of EG/water-based GNP/CNC hybrid nanofluid for heat transfer application","authors":"Md. Munirul Hasan,&nbsp;Md Mustafizur Rahman,&nbsp;Suraya Abu Bakar,&nbsp;Muhammad Nomani Kabir,&nbsp;Devarajan Ramasamy,&nbsp;A. H. M. Saifullah Sadi","doi":"10.1007/s10973-024-13873-3","DOIUrl":"10.1007/s10973-024-13873-3","url":null,"abstract":"<div><p>Thermal management efficiency is still a significant problem in many industries and techniques due to the ultimate limitations in the performance of conventional heat transfer fluids. The present research focuses on predicting the thermophysical properties of hybrid graphene nanoplatelet (GNP) and cellulose nanocrystal (CNC) nanoparticles to improve the thermal performance of heat transfer systems. Resolving the thermal management issues can be critical for saving energy, enhancing the effectiveness of the systems, and advancing the existing and emerging technologies needed to handle high temperatures. GNP-CNC/ethylene glycol–water hybrid nanofluids were prepared in volume concentrations from 0.01 to 0.2%. Thermal conductivity was measured from 30 to 80 °C, providing comprehensive data for analysis. The most important resolution was formulated at 0.1% volume concentration within a 60:40 volume ratio of ethylene glycol and water, with UV–Vis analysis showing absorption peaks in the highest order at 0.10% and 0.2% concentrations. Thermogravimetric analysis has shown an increase towards thermal resilience, with the mass decline beginning at 130 °C and full degradation at 500 °C. An interesting observation was invested for 0.20% GNP: CNC, where the onset of degradation occurred at 150 °C, providing an increased variety of potential high temperatures. An artificial neural network (ANN) model was implemented to predict thermal conductivity, and 15 training functions were examined for the ANN structure. The model's best prediction results were obtained by utilizing tansig and Purlin transfer functions in a single hidden layer with ten neurons, which employed the Bayesian regularization function. It reached <i>R</i>² = 99.99%, MSE = 4.8352 × 10⁻⁷, and RMSE = 1.2083 × 10⁻³, which is superior to other functions, e.g. trainlm. The novelty is successfully synthesizing a stable GNP-CNC hybrid nanofluid with excellent thermophysical properties and establishing a highly accurate predictive model. The impact could be widespread in various industries, from better cooling to more efficient energy systems, and even the applicability of this effect in improving industrial processes.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1907 - 1932"},"PeriodicalIF":3.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theory of conjugate mixed convection flow of hybridized ethylene glycol based nanoparticles with Joule heating","authors":"Michael O. Oni,&nbsp;Mojeed T. Akolade,&nbsp;Gabriel Samaila,&nbsp;Taiwo S. Yusuf,&nbsp;Yusuf Olatunji Tijani,&nbsp;Abdulhakeem Yusuf,&nbsp;Peter Bukar Malgwi","doi":"10.1007/s10973-024-13875-1","DOIUrl":"10.1007/s10973-024-13875-1","url":null,"abstract":"<div><p>Fundamentals of heat and fluid flow in green energy system is found as an alternative transition technique to achieving a sustainable energy system (combat climate change, energy conversion, renewable energy). Dissipation being an integral part of heat generation and energy transfer in flow medium received no or little attention on conjugate mixed convection model. Considerable attention of this Ethylene Glycol-based hybrid nanofluid is vested on the examination of the Joule and viscous dissipation effects for enhancing nuclear reactor and automotive radiator coolants in mechanical systems. The Tiwari-Das model is employed to incorporate the effects of nanoparticles in the deterministic model. This model provides a comprehensive framework for understanding how the presence of nanoparticles influences the system’s behaviour. As such, the model incorporates the dynamics of Joule heating, electric current density, Darcy, and viscous dissipation for <span>({textrm{Al}}_{2}{textrm{O}}_{3})</span> and Cu nanoparticles in the energy conservation equation. The bivariate spectral local linearization method (BSLLM) is employed to solve the conjugate mixed convection model of Ethylene Glycol fluid suspending <span>({textrm{Al}}_{2}{textrm{O}}_{3})</span> and Cu nanoparticles, since the governing differential equation is of the two unknown variables. During numerical and graphical simulations, results show that for cooling mechanism, the hybridized nanofluid (Ethylene Glycol + <span>({textrm{Al}}_{2}{textrm{O}}_{3})</span> + Cu) outperformed the usual Ethylene Glycol, Ethylene Glycol + <span>({textrm{Al}}_{2}{textrm{O}}_{3})</span> nanofluid throughout the cases considered. The results indicate that in the absence of the Eckert number, the Nusselt number decreases by <span>(0.205%)</span> for the nanofluid, while increasing by <span>(4.639%)</span> for the hybrid nanofluid. Additionally, when excluding the effects of conjugate heat transfer, the Nusselt number decreases by <span>(11.833%)</span> for the nanofluid and by <span>(21.438%)</span> for the hybrid nanofluid. Lastly, when the electric field effect is removed, the Nusselt number decreases by <span>(9.056%)</span> for the nanofluid and by <span>(15.156%)</span> for the hybrid nanofluid.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1933 - 1945"},"PeriodicalIF":3.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-isothermal crystallization kinetics of PA11/carbon black composites","authors":"Jiaqi Gao,&nbsp;Yinghao Qi,&nbsp;Chuanchuan Dai,&nbsp;Yu Wu,&nbsp;Zhaoxin Li,&nbsp;Xuhuang Chen,&nbsp;Peng Yu,&nbsp;Siwen Bi","doi":"10.1007/s10973-024-13909-8","DOIUrl":"10.1007/s10973-024-13909-8","url":null,"abstract":"<div><p>This study employed differential scanning calorimetry to investigate the non-isothermal crystallization kinetics of PA11/CB composites. Additionally, the crystal structures of PA11/CB were studied employing WAXD, revealing that the PA11 was the an <i>α</i> crystal structure at room temperature and the addition of CB to PA11 had no discernible impact on the crystal structure of PA11. In this paper, the Mo models were employed to explore the non-isothermal crystallization kinetics. The Mo model successfully characterized the non-isothermal crystallization, and it was also found that crystallization rate increased with an elevation in the cooling rate, and the incorporation of CB accelerated the crystallization process of PA11. However, the Ozawa model proved inappropriate for describing the non-isothermal crystallization in these blends. The research substantiated that CB indeed promoted the crystallization of PA11, as evidenced by calculations involving the activation energy of non-isothermal crystallization and the nucleation activity of CB.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1645 - 1656"},"PeriodicalIF":3.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel exact solutions of momentum and energy equations for hybrid nanofluid flow on a stretching sheet: Whittaker’s function-based solutions","authors":"Arman Taghavi,&nbsp;Saeed Dinarvand","doi":"10.1007/s10973-024-13735-y","DOIUrl":"10.1007/s10973-024-13735-y","url":null,"abstract":"<div><p>This study investigates the exact solutions of laminar velocity and thermal boundary layers of <span>(text{Al}_{2}{text{O}}_{3} -text{CNT}/text{water})</span> hybrid nanofluid flow over a permeable stretching sheet. The sheet with a nonlinear temperature distribution, placed through a porous medium under a vertical magnetic field, is considered as a general problem. The solutions of momentum and energy equations are derived for all the conditions under which there are analytical answers, based on comprehensive boundary conditions and Whittaker’s functions. The hybrid nanofluid flow performance is comprehensively investigated based on the velocity and temperature distributions as well as the non-dimensional quantities. In addition, the impact of 7 problem parameters, including the mass transfer factor, characteristic velocity and temperature nonlinearity of sheet, as well as the nanoparticles concentration, the magnetic field strength, the medium permeability and the base fluid Prandtl number are addressed. The results indicate that the sheet mass transfer parameter has the highest effect on the thermo-hydraulic performance of flow, competing with the influence of Prandtl number on the system heat transfer. Indeed, the wall suction significantly increases both the heat transfer rate and pressure loss, and the Prandtl number is an upward function of the former parameter. The boundary layer thickness varies from <span>(15text{%})</span> to <span>(100text{%})</span> if <span>({f}_{0})</span> changes from <span>(-2)</span> to <span>(C)</span>. Additionally, when <span>({f}_{0}=-2)</span>, heat transfer performance is threefold greater than its value under <span>({f}_{0}=0)</span>. This performance also increases from 2 to 13 by the increase in the Prandtl number from 1 to 6.5 at <span>({f}_{0}=-2)</span>. Eventually, the range of wall mass transfer factor for which there are exact solutions relies on all the parameters existing in the momentum equation, which is also completely discussed.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1691 - 1709"},"PeriodicalIF":3.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase change materials: classification, use, phase transitions, and heat transfer enhancement techniques: a comprehensive review","authors":"Fatiha Chebli,&nbsp;Farid Mechighel","doi":"10.1007/s10973-024-13877-z","DOIUrl":"10.1007/s10973-024-13877-z","url":null,"abstract":"&lt;div&gt;&lt;p&gt;Currently, there is great interest in producing thermal energy (heat) from renewable sources and storing this energy in a suitable system. The use of a latent heat storage (LHS) system using a phase change material (PCM) is a very efficient storage means (medium) and offers the advantages of high volumetric energy storage capacity and the quasi-isothermal nature of the storage process. In recent years, phase change materials (PCMs) have become an interesting research area due to their advantages especially in thermal energy storage (TES). Indeed, there are a large number of PCMs that melt and solidify over a wide temperature range, making them interesting thermal energy storage media in several applications. In the literature, research on PCMs and their associated applications has attracted and still attracts great interest from various researchers and scientists. Most of the research studies on phase change materials (PCMs) have been generally devoted to the development of PCM-based energy storage technologies, the promotion of PCM-based renewable energy sources, and the encouragement of sustainable/profitable (economic) use of PCM-based energy. In order to get an overview of current progress and trends, to highlight research and to identify gaps, from the literature reviews undertaken on this research topic, it is useful to review the major research studies conducted in this field. Our analysis showed that the literature lacks many comprehensive analyses and studies on the applications of PCMs, the phase transition processes (melting and solidification) of PCMs and the factors that influence these transitions, and in particular the calculation models of the thermal performance parameters of a PCM performing a phase transition and the thermal performance parameters of a PCM-based TES system (referred to as LHS unit). To address these questions, we have presented in this review article a detailed overview of the literature on (a) relevant practical applications of PCMs, (b) characteristics and performances of phase transition processes, (c) major factors influencing PCM transition processes such as geometric design of the PCM tank and its orientation, imposed boundary and operating conditions, thermophysical properties of the material (PCM), and (d) models for calculating thermal performance parameters for a PCM performing a phase transition and for an LHS unit. In addition, several techniques aimed at improving heat transfer in PCMs have been introduced and discussed. The findings indicate that there are three types of PCMs: eutectic, inorganic, and organic. Numerous other industries also use PCMs, such as solar energy (including thermal energy storage through the use of photovoltaic and latent heat systems); buildings; HVAC systems; textiles; the biomedical, food, and agricultural industries; the automotive sector; and desalination. Besides PCMs classification and use, it was found that during phase transitions of PCMs heat transfer is ","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1353 - 1411"},"PeriodicalIF":3.0,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative analysis of Darcy–Forchheimer nanofluid flow with thermal and solutal effects over a Riga plate","authors":"Asif Ali,&nbsp;Muhammad Nauman Aslam,&nbsp;Muhammad Sheraz Junaid,&nbsp;Tanweer Sohail,&nbsp;Syed Tauseef Saeed,&nbsp;A. Al-Zubaidi,&nbsp;Zeeshan Saleem Mufti","doi":"10.1007/s10973-024-13901-2","DOIUrl":"10.1007/s10973-024-13901-2","url":null,"abstract":"<div><p>The nanoparticles enhance heat transfer ability so the performance of energy storage and production devices is improved. This study explores the Darcy–Forchheimer nanofluid flowing through a Riga plate. Thermal radiation with heat source/sink is taken under analysis. The nanoparticles of copper (Cu) are mixed with the non-Newtonian Williamson fluid. The governing partial differential equations are transformed into ordinary differential equations and then solved numerically with the Bvp4c solver in MATLAB and analytically by homotopy analysis method (HAM). Graphical solutions of the velocity, temperature, and concentration with skin friction, Nusselt number, and Sherwood number are investigated. Surface plotting is also used to show a reduction of velocity and an improvement in temperature. The decreasing percentage of Nusselt number is obtained when thermal stratification varies from 0.0 to 6.0, and the diminishing percentage of Sherwood number is attained when the solution stratification parameter varies from 0.0 to 0.6 for Williamson fluids.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1887 - 1905"},"PeriodicalIF":3.0,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal stability and Ar + ion irradiation behaviour of SLM AlSi10Mg alloy post-processed via KOBO extrusion method","authors":"Przemysław Snopiński,&nbsp;Krzysztof Matus,&nbsp;Mariusz Król,&nbsp;Tymon Warski,&nbsp;Michal Kotoul,&nbsp;Marek Barlak,&nbsp;Katarzyna Nowakowska-Langier","doi":"10.1007/s10973-024-13940-9","DOIUrl":"10.1007/s10973-024-13940-9","url":null,"abstract":"<div><p>Ultra-fine-grained (UFG) and nanotwinned (NT) materials are anticipated to exhibit exceptional resistance to irradiation due to their significant volume fraction of grain boundaries. However, a notable drawback is their susceptibility to grain coarsening at elevated temperatures, which significantly limits their practical application as irradiation-resistant materials, particularly in high-temperature environments. In this study, an AlSi10Mg alloy, prepared using laser powder bed fusion (LPBF), underwent post-processing via the KOBO extrusion method, resulting in an ultra-fine-grained microstructure with an enhanced fraction of coincident site lattice (CSL) twin boundaries. The investigation was conducted in three phases. The first phase involved modelling radiation damage to gain insights into the expected behaviour of the microstructures under irradiation. The second phase included a comprehensive analysis of the microstructures of both as-built and KOBO-processed samples using light, scanning, and transmission electron microscopy. This analysis revealed an ultra-fine-grained microstructure with a mean grain size of approximately 0.8 µm and an increase in the fraction of CSL boundaries from 30% in the as-built state to 42% following KOBO extrusion. In the third phase, the thermal stability of both samples was assessed through annealing experiments conducted for 1 h across a temperature range of 300–500 °C, with 50 °C intervals. To further explore the impact of the nanotwinned microstructure on thermal stability, irradiation experiments were conducted using 60 keV He⁺ ions to a dose of 5 × 10¹⁷ ions cm⁻² at 130 °C. The results indicated an improved irradiation resistance in the KOBO-processed sample, as evidenced by a thinner sponge-like structure formation upon Ar⁺-ion irradiation compared to the as-built counterpart.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 2","pages":"991 - 1012"},"PeriodicalIF":3.0,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}