Materialwissenschaft und Werkstofftechnik最新文献

{"title":"Prediction of limiting strains and fracture toughness of deep drawing quality steel using stretching and incremental forming processes\u0000 Vorhersage der Grenzdehnung und Bruchzäähigkeit von Tiefziehstahl unter Verwendung von Streck- und inkrementellen Umformverfahren","authors":"P. K. Gandla,&nbsp;A. Padamurthy,&nbsp;S. S. Kumar,&nbsp;S. Pandre,&nbsp;R. Naresh,&nbsp;P. R. Pati,&nbsp;A. Sheelwant,&nbsp;B. K. Potnuru","doi":"10.1002/mawe.70115","DOIUrl":"https://doi.org/10.1002/mawe.70115","url":null,"abstract":"<p>Products made of sheet metal are widely used in aerospace, automotive, and architecture due to their lightweight, strength, and formability. However, unexpected fractures during forming pose a challenge. This research paper examines the fracture thresholds of deep drawing quality steel sheets by utilizing both forming limit diagrams and fracture forming limit diagrams, which were developed through stretching and incremental sheet forming. Oyane's damage model predicts theoretical fracture limits, aligning with experimental incremental sheet forming results within a 7.47 % error. Fracture toughness, measured via double notched tensile tests and incremental sheet forming, shows a strong correlation (R = 274.2 kJ/m² and R = 280.2 kJ/m², respectively). Hemispherical cups were formed using single and multi-stage incremental sheet forming, with multi-stage strategies mitigating failures observed in single-stage forming. In multi-stage shaping, a novel theoretical model forecasts sheet thickness. Experimental testing and finite element simulations are conducted to analyze forming forces and deformation energy. Fractographic analysis confirms ductile failure, as evidenced by the presence of dimples and voids.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 4","pages":"351-362"},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148274818","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":"Modeling of the hot flow behavior and processing maps of an austenitic Fe-30Mn-8Al-1C low-density steel\u0000 Modellierung des Warmfließverhaltens und der Verarbeitungsdiagramme eines austenitischen Fe-30Mn-8Al-1C-Leichtbaustahls","authors":"M. García-Domínguez,&nbsp;I. Mejía,&nbsp;A. Bedolla-Jacuinde,&nbsp;J.M. Cabrera","doi":"10.1002/mawe.70125","DOIUrl":"https://doi.org/10.1002/mawe.70125","url":null,"abstract":"&lt;p&gt;Low-density steels have an excellent combination of mechanical properties for structural applications in transportation. However, a comprehensive understanding of their hot flow behavior over wide processing windows, particularly accounting for microstructural instabilities, remains limited. The main objective of this research is to provide a comprehensive physically-based description of the hot flow behavior and processing maps of an austenitic Fe-30Mn-8Al-1C low-density steel over a wide temperature-strain-rate domain, explicitly correlating hardening and softening mechanisms with microstructural instabilities induced by κ-carbide and inclusion precipitation. The steel was manufactured via vacuum induction melting, followed by thermo-mechanical treatment. Hot uniaxial compression tests were carried out at temperatures of 700 °C to 1000 °C and strain rates of 0.0005 s&lt;sup&gt;−1&lt;/sup&gt; to 0.1 s&lt;sup&gt;−1&lt;/sup&gt;. Physically based models were applied to derive the constitutive equations describing the hot deformation behavior, and processing maps were created using the Prasad criterion. Results show that lower temperatures and higher strain rates increase deformation resistance, while higher temperatures promote dynamic recrystallization. A good agreement was observed between experimental and modeled &lt;span&gt;&lt;/span&gt;&lt;math&gt;&lt;/math&gt; curves. Optimal processing conditions were identified at temperatures of 700 °C to 1000 °C and strain rates &lt; 0.01 s&lt;sup&gt;−1&lt;/sup&gt;, while instability regions were found at 700 °C to 800 °C and strain rates &gt; 0.01 s&lt;sup&gt;−1&lt;/sup&gt;. The presence of precipitated particles of κ-carbides, aluminum nitrides and manganese sulfides, contributes to the plastic flow instability.&lt;/p&gt;&lt;p&gt;Leichtbaustähle zeichnen sich durch eine hervorragende Kombination aus hoher Festigkeit, Duktilität und reduzierter Dichte aus und sind daher von großem Interesse für strukturelle Anwendungen im Transportwesen. Dennoch ist das Warmfließverhalten dieser Werkstoffe über weite Prozessfenster hinweg, insbesondere unter Berücksichtigung mikrostruktureller Instabilitäten, bislang nur unzureichend verstanden. Ziel dieser Arbeit ist es, eine umfassende physikalisch basierte Beschreibung des Warmfließverhaltens und der Verarbeitungskarten eines austenitischen Fe-30Mn-8Al-1C-Leichtbaustahls über einen breiten Temperatur-Dehnraten-Bereich bereitzustellen und dabei Verfestigungs- und Entfestigungsmechanismen explizit mit mikrostrukturellen Instabilitäten infolge der Ausscheidung von κ-Karbiden und Einschlüssen zu korrelieren. Der Stahl wurde mittels Vakuuminduktionsschmelzen hergestellt und anschließend thermomechanisch behandelt. Einachsige Heißkompressionsversuche wurden bei Temperaturen zwischen 700 °C und 1000 °C sowie Dehnraten von 0,0005 s&lt;sup&gt;−1&lt;/sup&gt; bis 0,1 s&lt;sup&gt;−1&lt;/sup&gt; durchgeführt. Physikalisch basierte Modelle wurden angewandt, um konstitutive Gleichungen zur Beschreibung des Warmverformungsverhaltens abzuleiten, und Verarbeitungskarten wurden unter Verwe","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 4","pages":"298-319"},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148274901","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 tungsten on the microstructure and properties of CoCrNiTiAl series high entropy alloys\u0000 Einfluss von Wolfram auf das Gefüge und die Eigenschaften von CoCrNiTiAl-Hochentropie-Legierungen","authors":"M. Liu,&nbsp;L. Hu,&nbsp;L. He,&nbsp;D. Weng,&nbsp;S. He,&nbsp;F. Meng,&nbsp;F. Cheng,&nbsp;H. Shen","doi":"10.1002/mawe.70126","DOIUrl":"https://doi.org/10.1002/mawe.70126","url":null,"abstract":"<p>As a novel metallic material, high-entropy alloys have garnered significant attention from researchers due to their exceptional mechanical properties. In this study, Co_33.5Cr₂₀Ni_33.5Al₅Ti₃W_x (x = 0, 3, 5, 7, 9) high-entropy alloys with varying tungsten contents were manufactured through the vacuum arc melting method. The impact of tungsten content on the alloys’ structure, mechanical properties, and high-temperature oxidation resistance was examined using x-ray diffraction and scanning electron microscope. Results show that the oxidation resistance of Co_33.5Ni_33.5Cr₂₀Al₅Ti₃W_x high-entropy alloys decreases initially, followed by an increase and ultimately a drop with increasing tungsten content. The most optimal oxidation resistance is observed in alloys with x = 0 and 7 (0.45 mg·cm⁻², 0.62 mg·cm⁻²). Adding more tungsten increases fracture strength, plastic strain, and microhardness. The superior mechanical properties of Co_33.5Ni_33.5Cr₂₀Al₅Ti₃W₅ alloy (740 MPa) stem from tungsten-induced solid solution strengthening and grain refinement, with higher tungsten content enhancing ductility while maintaining high strength. These findings provide valuable insights for future researchers in designing components, controlling microstructure, and developing properties of high-entropy alloys.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 4","pages":"286-297"},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148274828","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—variable optimization of abrasive water jet machining using weighted—grey relational method for Ti-6Al-4V alloys\u0000 Multivariable Optimierung der abrasiven Wasserstrahlbearbeitung mit der gewichteten Grauwertmethode für TiAl6V4-Legierungen","authors":"C. Chaturvedi,&nbsp;H. Kumar,&nbsp;L. Nagdeve,&nbsp;S. Kumar","doi":"10.1002/mawe.70123","DOIUrl":"https://doi.org/10.1002/mawe.70123","url":null,"abstract":"<p>Abrasive water jet machining (AWJM) rapidly processes diverse materials compared to modern techniques. Titanium alloys, used in aircraft engines, medical implants, and tools resist conventional machining due to low thermal conductivity, favouring this technology. The trials are performed in accordance with the Taguchi L₂₅ orthogonal array. Employment of response surface methodology (RSM) to determine efficient machining set up of process parameters has been accomplished in this study. Controlled variables considered are water pressure (P), transverse speed (TS), stand—off distance (SoD) and abrasive flow rate (AFR). The integration of the weighted—grey relational analysis (WGRA) approach has enabled authors to evaluate performance of machine. Measured responses are Rockwell hardness C—scale (HRC 100), machining time (MT), and surface roughness (SR). The position P₄AFR₄SoD₂TS₅ represents the location for the maximum grey relational grade, which suggest that highest pressure and abrasive flow rate condition for achievement of best result with minimum speed targeted from lower distance. The participation percentage is as follow of 78.47 %, 6.27 %, 6.05 %, and 5.49 %, respectively. Improvement in the machine performance is microscopically analysed and influence upon mechanism is explained.</p><p>Die abrasive Wasserstrahlbearbeitung (AWJM) bearbeitet im Vergleich zu modernen Techniken schnell verschiedene Materialien. Titanlegierungen, die in Flugzeugtriebwerken, medizinischen Implantaten und Werkzeugen verwendet werden, widerstehen der konventionellen Bearbeitung aufgrund ihrer geringen Wärmeleitfähigkeit, was diese Technologie bevorzugt. Die Versuche wurden gemäß dem orthogonalen Array Taguchi L₂₅ durchgeführt. In dieser Studie wurde die Response-Surface-Methode (RSM) eingesetzt, um eine effiziente Bearbeitung und die Einrichtung der Prozessparameter zu bestimmen. Als kontrollierte Variablen wurden Wasserdruck (P), Quergeschwindigkeit (TS), Arbeitsabstand (SoD) und Abrasivmittel-Durchflussrate (AFR) berücksichtigt. Durch die Integration des Ansatzes der gewichteten Grau-Relationalen Analyse (WGRA) konnten die Autoren die Leistung der Maschine bewerten. Gemessene Reaktionen sind Rockwell-Härte C-Skala (HRC 100), Bearbeitungszeit (MT) und Oberflächenrauheit (SR). Die Position P4AFR4SoD2TS5 stellt die Position für den maximalen Grau-Relationalen Grad dar, was darauf hindeutet, dass höchster Druck und höchste Abrasivmittel-Durchflussrate die Voraussetzung für das Erreichen des besten Ergebnisses bei minimaler Geschwindigkeit aus geringerer Entfernung sind. Die Teilnahmequote beträgt 78,47 %, 6,27 %, 6,05 % bzw. 5,49 %. Die Verbesserung der Maschinenleistung wird mikroskopisch analysiert und der Einfluss auf den Mechanismus erklärt.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 4","pages":"320-334"},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148274813","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. 4/2026","authors":"","doi":"10.1002/mawe.70137","DOIUrl":"https://doi.org/10.1002/mawe.70137","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 4","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.70137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148274687","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":"Microstructural evolution of V-Ti-B based high-temperature alloys during surface conditioning by means of laser beam melting\u0000 Entwicklung der Gefüge von V-Ti-B-Hochtemperatur-Legierungen während der Oberflächenmodifikation mittels selektivem Laserstrahlschmelzen","authors":"M. Carrion Saldaña,&nbsp;W. Yang,&nbsp;G. Hasemann,&nbsp;H.-J. Christ,&nbsp;R. Schwaiger,&nbsp;M. Krüger,&nbsp;B. Gorr,&nbsp;A. von Hehl","doi":"10.1002/mawe.70124","DOIUrl":"https://doi.org/10.1002/mawe.70124","url":null,"abstract":"<p>Respecting the potential of additive manufacturing (AM) technologies to enhance material performance, this article presents the first results of an investigation on the use of laser beam melting (LBM) on V-Ti-B alloys. Latter possess a high melting point and low density which are required for high-temperature structural applications. The research objective is to demonstrate the feasibility of the laser beam melting (LBM) technique to create graded microstructures and therefore to modify alloy properties throughout the specimen. Two values of the laser beam power were applied. The microstructural evolution of alloys with varying titanium and boron concentrations was examined by conducting scanning electron microscopy (SEM) and energy dispersive x ray spectroscopy (EDS) analyses throughout the entire process. Hardness measurements performed in the core of the samples as well as on the laser beam treated surfaces demonstrated that the surface conditioning of the V-Ti-B alloys result in higher hardness values, with increases ranging from 70 HV 10 (approx. 5 %; alloy V–28Ti–40B; 120 W) to 500 HV 10 (approx. 33%; alloy V–28Ti–40B; 180 W) compared to the intrinsic hardness of alloys in the arc–melted conditions. The experimental results clearly show that the fine microstructure is more favorable for the laser beam melting (LBM) application.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 4","pages":"272-285"},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.70124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148274900","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148088953","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148087786","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 3","pages":"181-183"},"PeriodicalIF":1.1,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148087785","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148087787","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}