Materialwissenschaft und Werkstofftechnik最新文献

{"title":"Essential work of fracture and absorbed energy by Charpy impact test of TRIP780 1.5 mm thick sheet steel\u0000 Kerbschlagarbeit und absorbierte Energie bei der Charpy-Schlagprüfung an 1,5 mm dickem Restaustenitstahlblech (HCT 780)","authors":"W. R. Soares,&nbsp;C. A. R. P. Baptista,&nbsp;J. A. Avila,&nbsp;H. Goldenstein","doi":"10.1002/mawe.70174","DOIUrl":"https://doi.org/10.1002/mawe.70174","url":null,"abstract":"<p>Transformation-induced plasticity (TRIP) steels have been extensively studied concerning their mechanical performance under monotonic loading and conventional microstructural characterization. However, despite their pivotal role in various industries, particularly automotive, limited attention has been devoted to the fracture toughness of TRIP steels, especially in thin sheet forms. Given the increasing demand for materials with enhanced toughness, reliable and rapid alternative methods for measuring toughness are required. In this research, we evaluate the fracture toughness of TRIP780 steel, presented as 1.5 mm-thick sheets. The study analyzes its mechanical behavior using mechanical strength (tensile tests), toughness, and absorbed energy (essential work of fracture – EWF and Charpy impact tests). The microstructural characterization was performed using LePera chemical etchant and x-ray diffraction techniques, revealing a multi-phase structure comprising ferrite, bainite, and martensite/austenite constituents. The findings indicate that TRIP780 exhibits commendable ductility and energy absorption, with an essential work of fracture of 133.6 kJ/m². However, the impact test exhibited notable temperature sensitivity, as observed in the transition from ductile behavior at room temperature to brittle cleavage at -50 °C. Furthermore, discrepancies between our results and data reported in the literature suggest that the steel processing conditions strongly influence fracture behavior.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"895-907"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.70174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149083958","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}

{"title":"Computational optimization of micro-machining parameters for maraging steel using evolutionary algorithm\u0000 Evolutionäre Algorithmus-basierte Parameteroptimierung für die Präzisions-Mikrobearbeitung von martensitaushärtendem Stahl","authors":"M. Madhavi,&nbsp;P. Srikanth","doi":"10.1002/mawe.70177","DOIUrl":"https://doi.org/10.1002/mawe.70177","url":null,"abstract":"<p>Micro-electrical discharge machining affords good machinability for maraging steel which possess excessive hardness. In order to identify the ideal drilling settings, this work suggests a hybrid optimization strategy that combines Taguchi orthogonal array design with an evolutionary genetic algorithm (GA). Regression models are developed for predicting an effective experimental design in the Taguchi orthogonal array. A multi-objective fitness function that maximizes material removal rate (MRR) and minimizes tool wear rate (TWR) is generated in the algorithm. The investigation is done to find ideal solutions outside the experimental space. The prediction accuracy of the constructed models is strong (R² &gt; 0.93). Single-point crossover, tournament selection and adaptive convergence criteria for repeatability are all included in the framework. When compared to traditional Taguchi optimization, experimental validation shows a 14.6 % decrease in tool wear rate of 1.572 mm³·min⁻¹ and a 13 % rise in material removal rate of 0.0322 mm³·min⁻¹ by setting the parameters at voltage of 50 V, current of 4 A and pulse-on time of 6 μs. With significant promise for aerospace and tooling applications, this hybrid methodology offers an efficient and methodical way to optimize processes for machining hard materials.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"908-923"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149083960","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}

{"title":"Impressum: Materialwiss. Werkstofftech. 9/2026","authors":"","doi":"10.1002/mawe.70180","DOIUrl":"https://doi.org/10.1002/mawe.70180","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.70180","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149084108","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}

{"title":"Comparative study on the hydration behavior of calcium oxide derived from eggshell waste: Influence of procedure and hydration agent\u0000 Vergleichende Untersuchung des Hydratationsverhaltens von Calciumoxid aus Eierschalenabfällen: Einfluss von Verfahren und Hydratisierungsmittel","authors":"S. N. Demiran,&nbsp;R. Ozdemir,&nbsp;H. Bozkurt,&nbsp;H. C. Yavuz,&nbsp;E. Dursun,&nbsp;M. Istek,&nbsp;A. Z. Akkan,&nbsp;D. D. E. Koyuncu","doi":"10.1002/mawe.70157","DOIUrl":"https://doi.org/10.1002/mawe.70157","url":null,"abstract":"<p>In this study, calcium oxide was synthesized from waste eggshells and subsequently converted to calcium hydroxide via two distinct methods: hydrothermal (H) and bubble (B) techniques. The influence of synthesis parameters including hydration method, type of hydration agent (pure water or ethanol-water mixture), temperature range (150 °C-230 °C), and solid-to-liquid ratio on the physicochemical properties of the resulting calcium hydroxide was systematically investigated. Comprehensive characterization was conducted to evaluate structural, morphological, and surface characteristics. The bubble method yielded smaller crystallites, while lower hydrothermal temperatures were found to favor porosity and enhanced surface area. According to X-ray Diffraction patterns, the sample labeled 230H04 (10 mL) exhibited the largest crystallite size (59.50 nm), whereas 230B31 demonstrated the highest surface area (31.14 m²/g) and 150H31 the greatest pore volume (0.19 cm³/g). These findings highlight the critical role of synthesis route selection in tailoring the physicochemical properties of calcium hydroxide to meet specific application requirements.</p><p>In dieser Studie wurde Calciumoxid aus Eierschalenabfällen synthetisiert und anschließend mittels zweier unterschiedlicher Verfahren (hydrothermale Behandlung (H) und durch Gasblasenbildung (B)) in Calciumhydroxid umgewandelt. Systematisch untersucht wurden die Auswirkungen verschiedener Syntheseparameter, einschließlich der Hydratisierungsmethode, der Zusammensetzung des Hydratisierungsmittels (reines Wasser oder Ethanol-Wasser-Gemisch), des Temperaturbereichs (150 °C-230 °C) sowie des Fest-Flüssig-Verhältnisses auf die physikochemischen Eigenschaften des resultierenden Calciumhydroxids. Es wurde eine umfassende Charakterisierung durchgeführt, um die strukturellen, morphologischen und Oberflächeneigenschaften zu bewerten. Die Synthese mittels Durchleiten von CO₂ (eng. bubbling) führte zu kleineren Kristalliten, während niedrigere hydrothermale Temperaturen eine höhere Porosität und eine vergrößerte Oberfläche hervorrufen. Die Röntgen-Diffraktometrie der Probe mit der Bezeichnung 230H04 (10 ml) zeigt die größte Kristallgröße (59,50 nm), während 230B31 die höchste spezifische Oberfläche (31,14 m²/g) und 150H31 das größte Porenvolumen (0,19 cm³/g) erreichte. Diese Ergebnisse unterstreichen die entscheidende Rolle der Wahl des Synthesewegs bei der Anpassung der physikochemischen Eigenschaften von Calciumhydroxid an spezifische Anwendungsanforderungen.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"848-859"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149084130","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}

{"title":"Effect of gadolinium on microstructure characteristics and strengthening mechanisms of Mg(-Gd)-Nd-Zn-Zr alloys by hot treatment\u0000 Einfluss von Gadolinium auf die Mikrostrukturmerkmale und Verfestigungsmechanismen von Mg(-Gd)-Nd-Zn-Zr-Legierungen durch Wärmebehandlung","authors":"Z. H. Yan,&nbsp;H. Z. Xu,&nbsp;F. Y. Jing,&nbsp;Z. Y. Liu,&nbsp;C. Du","doi":"10.1002/mawe.70173","DOIUrl":"https://doi.org/10.1002/mawe.70173","url":null,"abstract":"<p>In this study, a quantitative analysis was performed to assess the respective contributions of gadolinium (Gd) addition and heat treatment to the strengthening of the Mg–3Nd–1Zn–0.5Zr alloy. The results indicate that gadolinium addition not only refines the grain structure but also suppresses grain growth, while simultaneously promoting precipitate formation, thereby enhancing the overall strength. Moreover, as the gadolinium concentration increases, both solid-solution strengthening and the aging response are improved, resulting in higher peak-aging hardness and an extended incubation period. Notably, the solution-treated GNZ931K alloy exhibits ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) values of 227.8 MPa, 168.7 MPa, and 11.92 %, respectively. Furthermore, the peak-aged GNZ931K alloy exhibits excellent room-temperature mechanical properties, with the ultimate tensile strength, the yield strength, and the elongation values of 312.7 MPa, 219.7 MPa, and 3.34 %, respectively. Additionally, analysis of the strengthening mechanisms reveals that second-phase strengthening predominates in the as-cast state, solution strengthening becomes dominant after solution treatment, whereas precipitation strengthening plays a dominant role in the peak-aged alloy.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"880-894"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149084001","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}

{"title":"Low-voltage anodizing of AZ91 magnesium alloy: surface morphology and corrosion behaviour assessed by impedance analysis\u0000 Niederspannungsanodisierung der Magnesiumlegierung MgAl9Zn1: Oberflächenmorphologie und Korrosionsverhalten anhand einer Impedanzanalyse","authors":"Z. Nasiri Kolahi,&nbsp;V. Pouyafar,&nbsp;R. Meshkabadi,&nbsp;A. Mostafapour","doi":"10.1002/mawe.70170","DOIUrl":"https://doi.org/10.1002/mawe.70170","url":null,"abstract":"<p>Magnesium alloys, particularly AZ91, have emerged as promising candidates for biomedical implants due to their low density, biocompatibility, and mechanical properties resembling natural bone. However, their high chemical reactivity and poor corrosion resistance in physiological environments remain major limitations. This study investigates the effect of low-voltage anodizing on the surface morphology, porosity, corrosion resistance, and hardness of AZ91 alloy using a phosphate-based electrolyte composed of 0.2 M K₃PO₄ and 0.6 M K₂HPO₄. A series of anodizing treatments were conducted at voltages ranging from 0.5 V to 1.5 V and durations of 10 min, 20 min, and 30 min. Surface characterization via scanning electron microscopy (SEM) and porosity analysis revealed that the optimal condition—1.5 V for 20 minutes — produced the most compact and uniform oxide layer with minimal porosity. Electrochemical impedance spectroscopy confirmed enhanced corrosion resistance under these conditions, while hardness testing demonstrated significant improvement in surface hardness. These findings suggest that low-voltage anodizing is a viable strategy for improving the durability and performance of AZ91 magnesium alloy toward potential biodegradable applications.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"924-936"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149083937","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}

{"title":"Multi–criteria optimization of cutting parameters during dry computer numerical controlled milling of martensitic stainless steels 410 and 420 using grey relational analysis\u0000 Multikriterielle Optimierung der Schneidparameter beim computergesteuerten Trockenfräsen der martensitischen rostfreien Stähle 410 und 420 unter Verwendung der Grauwertanalyse","authors":"P. George,&nbsp;D. P. Selvaraj,&nbsp;D. S. Ebenezer Jacob Dhas,&nbsp;P. George","doi":"10.1002/mawe.70168","DOIUrl":"https://doi.org/10.1002/mawe.70168","url":null,"abstract":"<p>This study optimized cutting parameters for dry computer numerical control milling of martensitic stainless steels (410/420) using grey relational analysis and identified the optimal parameters as a spindle speed of 1500 min⁻¹, a depth of cut of 0.3 mm, and feed rate of 30 mm/min, achieving a balanced reduction in R_a (0.62 μm– 0.66 μm) and F_c 164 – 200 N) and with a balanced temperature of 44 – 48 °C. Analysis of variance revealed that the depth of cut was the dominant factor, contributing 57 % (martensitic stainless steel 410) and 62 % (martensitic stainless steel 420) to the grey relational grade variance. This was followed by the feed rate (27 % and 25 %, respectively) and the spindle speed (12 % and 10 %, respectively). The intermediate spindle speed of 1500 rpm softened the cutting zone, reducing F_c and R_a. Normal probability plots confirmed residual normality, validating the reliability of the experiment. Surface plots revealed peak grey relational grade values at a medium spindle speed and a low depth of cut/feed. Scanning electron microscope is employed for tool wear analysis. This study shows that parameter synergy, rather than individual adjustments, is essential for multi-objective optimization in hard-to-machine steels.</p><p>Diese Studie optimierte die Schnittparameter für das Trockenfräsen von martensitischen Edelstahl (410/420) mit computerunterstützter numerischer Steuerung unter Verwendung der Grey-Relational-Analyse und identifizierte die optimalen Parameter als eine Spindeldrehzahl von 1500 U/min, eine Schnittiefe von 0,3 mm und eine Vorschubgeschwindigkeit von 30 mm/min, wodurch eine ausgeglichene Reduzierung von Ra (0,62 μm– 0,66 μm) und Fc (164 N – 200 N) erreicht wurde und eine ausgeglichen kontrollierte Temperatur von 44 °C– 48 °C beibehalten wurde. Die Varianzanalyse ergab, dass die Schnitttiefe der dominierende Faktor war und 57 % (martensitischer Edelstahl 410) bzw. 62 % (martensitischer Edelstahl 420) zur Varianz des grauen Relativgrades beitrug. Darauf folgten die Vorschubgeschwindigkeit (jeweils 27 % und 25 %) und die Spindeldrehzahl (jeweils 12 % und 10 %). Die mittlere Spindeldrehzahl von 1500 min⁻¹ erwärmte die Schnittzone, wodurch Fc und Ra reduziert wurden. Normalwahrscheinlichkeitsdiagramme bestätigten die Normalität der Residuen und validierten die Zuverlässigkeit des Experiments. Flächenplots zeigten Spitzenwerte des grauen Relativgrades bei mittlerer Spindeldrehzahl und geringer Schnitttiefe/Vorschub. Ein Rasterelektronenmikroskop wird für die Werkzeugverschleißanalyse eingesetzt. Diese Studie zeigt, dass die Parametriersynergie anstelle einzelner Anpassungen für die Multi-Objektiv-Optimierung bei schwer zu bearbeitenden Stählen entscheidend ist.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"937-959"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149083989","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}

{"title":"Materialwiss. Werkstofftech. 9/2026","authors":"","doi":"10.1002/mawe.70181","DOIUrl":"https://doi.org/10.1002/mawe.70181","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"833-836"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149084109","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}

{"title":"A theoretical investigation of PbO doped B2O3-SiO2-ZrO2-Li2WO4-Eu2O3 glass system\u0000 Eine theoretische Untersuchung des mit PbO dotierten B2O3-SiO2-ZrO2-Li2WO4-Eu2O3 Glassystems","authors":"Y. Kavun,&nbsp;R. Makwana,&nbsp;Vishal Unagar","doi":"10.1002/mawe.70171","DOIUrl":"https://doi.org/10.1002/mawe.70171","url":null,"abstract":"<p>In present study, theoretical shielding performance of borosilicate glasses with composition (65 − x)B₂O₃–10SiO₂–10ZrO₂–10Li₂WO₄–5Eu₂O₃–xPbO (x = 0 mol-%, 2.5 mol-%, 5 mol-%, 7.5 mol-%, and 10 mol-%) against gamma radiation was investigated. The effect of presence of different proportion of PbO in the borosilicate glass system with high chemical and thermal stability, the radiation attenuation capacity of the glasses was investigated. The shielding parameters of the glasses for gamma ray of energies 356 keV, 662 keV, 1173 keV, and 1333 keV were calculated using MCNP6.2, PHITS Monte Carlo Simulation codes, and retrieved from XCOM theoretical database. As a results of the study, it was observed that density of the glasses, mass attenuation coefficient (MAC) and linear attenuation coefficient (LAC) values increased with the increase in PbO doping. Due to photoelectric interaction dominance in low gamma energy region the Pb element with high atomic number played an active role in glass. MCNP and PHITS simulation results showed high consistency when compared with XCOM data. The findings revealed that PbO enriched borosilicate glasses can be used as effective radiation shielding materials, especially in areas such as medical imaging, nuclear power plants and space applications.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"837-847"},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149084034","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}

{"title":"Cover Picture: (Materialwiss. Werkstofftech. 9/2026)","authors":"","doi":"10.1002/mawe.70179","DOIUrl":"https://doi.org/10.1002/mawe.70179","url":null,"abstract":"<p>\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.70179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149084107","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}