Advanced Engineering Materials最新文献

{"title":"Additive Manufacturing-Induced Deformation Mechanisms in Co–Ni Superalloys Revealed by Integration of 3D EBSD and In Situ Digital Image Correlation","authors":"James D. Lamb,&nbsp;Evan B. Raeker,&nbsp;Leah H. Mills,&nbsp;Haydn Schroader,&nbsp;Alice Cervellon,&nbsp;McLean P. Echlin,&nbsp;Tresa M. Pollock","doi":"10.1002/adem.71127","DOIUrl":"https://doi.org/10.1002/adem.71127","url":null,"abstract":"<p>Laser powder bed fusion (LPBF) additive manufacturing produces components with unique microstructural features that significantly differ from conventionally processed materials, including columnar grain structures, intragranular orientation gradients, and elevated dislocation densities. However, the relationship between these complex microstructural characteristics and mechanical behavior, particularly deformation mechanisms at the grain scale, remains poorly understood. In this study, 3D electron backscatter diffraction characterization via TriBeam tomography and high-resolution digital image correlation is performed to quantitatively compare the microstructure-deformation relationships in wrought and LPBF processed GammaPrint-700. The LPBF sample exhibits a 12% higher yield strength and elevated elastic modulus compared with the wrought material, which is attributed to increased grain boundary density, geometrically necessary dislocation (GND) density, and texture differences. Slip behavior differs markedly: The LPBF sample displays more homogeneous deformation, observed as a 200% higher slip trace density with 50% lower slip amplitudes compared with the wrought material, which exhibits localization along twin boundaries and triple junctions. These findings demonstrate that the complex thermomechanical history of LPBF creates inherent work hardening through GND accumulation and orientation gradients, while simultaneously delocalizing plastic strain. This delocalization mechanism suggests improved fatigue resistance in LPBF materials, providing new insights for processing-structure-property optimization in additively manufactured superalloys.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triple Junctions as Dislocation-Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation","authors":"Tobias Brink,&nbsp;Saba Saood,&nbsp;Peter Schweizer,&nbsp;Jörg Neugebauer,&nbsp;Gerhard Dehm","doi":"10.1002/adem.71011","DOIUrl":"https://doi.org/10.1002/adem.71011","url":null,"abstract":"<p>Grain boundary networks and their evolution are strongly influenced by triple junctions. The defect nature of these line defects significantly affects the network's properties, but they have not been fully characterized to date. Here, we use scanning transmission electron microscopy combined with atomistic computer simulations to investigate a triple junction at the atomic scale in an Al thin film with <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>{</mo>\u0000 <mn>111</mn>\u0000 <mo>}</mo>\u0000 </mrow>\u0000 <annotation>${111}$</annotation>\u0000 </semantics></math> texture. Using sampling methods, we were able to construct a computer model of the same junction as in the experiment. We present a technique to calculate the Burgers vector of the triple junction. This allows us to connect the junction's dislocation character to the microscopic degrees of freedom of the joining grain boundaries. The junction line energy can then be calculated using an embedded atom method potential. It follows the same laws as bulk dislocations. Finally, we discovered a range of possible triple junctions for the observed grain boundaries, which vary in the magnitude of their Burgers vector. Interestingly, the experimentally observed junction does not have the smallest possible Burgers vector and energy. This suggests that the kinetics of transforming the junction line are likely too slow to be driven by the small energy contribution of the triple junction.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.71011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Rafting of Ni-Based Superalloys Under Multiaxial Load as Understood by Phase-Field Simulations and Critical Experiments","authors":"Micheal Younan,&nbsp;David Bürger,&nbsp;Gunther Eggeler,&nbsp;Oleg Shchyglo,&nbsp;Ingo Steinbach,&nbsp;Muhammad Adil Ali","doi":"10.1002/adem.202503030","DOIUrl":"https://doi.org/10.1002/adem.202503030","url":null,"abstract":"&lt;p&gt;Phase-field simulations coupled with dislocation density-based crystal plasticity modeling, supported by high-temperature creep experiments, are employed to investigate &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;γ&lt;/mi&gt;\u0000 &lt;mo&gt;′&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$gamma &amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;aposx;$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; rafting behavior in single-crystal Ni-based superalloys under uniaxial and shear loading conditions. The model captures both macroscopic creep strain and local microstructural evolution, including dislocation activity, stress distribution, and &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;γ&lt;/mi&gt;\u0000 &lt;mo&gt;′&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$gamma &amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;aposx;$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; morphology. Distinct &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;γ&lt;/mi&gt;\u0000 &lt;mo&gt;′&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$gamma &amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;aposx;$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; rafting morphologies develop under different loading modes: perpendicular plates under &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;⟨&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$langle$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;100&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;⟩&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$rangle$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; tension, L-type rafts under &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;⟨&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$langle$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;110&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;⟩&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$rangle$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; tension, and 45°-aligned plates under shear, aligned with experimental results and demonstrating the model's predictive capability. &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;γ&lt;/mi&gt;\u0000 &lt;mo&gt;′&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$gamma &amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;aposx;$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; volume fraction remains stable under shear in the simulation, consistent with the zero stress triaxiality under this loading condition. This framework enables microstructure-based ","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202503030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Microstructure-Controlled Crack Propagation and Fracture Resistance in MoSiBTiC Alloy Revealed by Multiscale Extended Finite Element Method Modeling","authors":"Junfeng Du,&nbsp;Takahiro Kaneko,&nbsp;Xinyu Yan,&nbsp;Takahito Ohmura,&nbsp;Kyosuke Yoshimi","doi":"10.1002/adem.202503158","DOIUrl":"https://doi.org/10.1002/adem.202503158","url":null,"abstract":"<p>In view of the influence of microstructure on the fracture resistance of MoSiBTiC alloys, the extended finite element method (XFEM) was used to investigate the crack propagation behavior and local fracture response of the alloy, and subsequently to evaluate the effects of microstructural morphology on fracture resistance. A finite element analysis (FEA) model was employed to characterize the macroscopic fracture response of the homogenized alloy and to calibrate the effective fracture-related parameters. In combination with nanoindentation and inverse analysis, the elastoplastic properties of the constituent phases were determined, and their averaged effective cohesive parameters were further calibrated using a simplified local fracture model. Furthermore, a multiscale FEA model was established based on the four-point bending test, and the microcrack paths were compared with experimental results. It was found that the fracture process of the alloy involves the interaction of multiple mechanisms. In addition, the variation in fracture resistance cannot be explained solely by the volume fraction of the ductile phase, based on the local fracture simulations with ideally bonded interfaces. In contrast, particle arrangements promoting more symmetric stress distributions, more regular particles with higher circularity and lower aspect ratio, tend to be associated with higher fracture resistance of the alloy.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202503158","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Columnar to Equiaxed Transition in Electron Beam Powder Bed Fusion (EB-PBF) Characterized Through Microstructure Analytics","authors":"Pascal Thome,&nbsp;Micheal Madigan,&nbsp;Shadman Tahsin Nabil,&nbsp;Owen Lowerey,&nbsp;Francisco Medina,&nbsp;Sammy Tin","doi":"10.1002/adem.202503160","DOIUrl":"https://doi.org/10.1002/adem.202503160","url":null,"abstract":"<p>Electron beam powder bed fusion (EB-PBF) offers the possibility to tailor local thermal histories via electromagnetic beam steering, yet the resulting columnar to equiaxed transition (CET) in Ni-based superalloys remains incompletely quantified. In this work, the CET in IN718 processed by spot-melting EB-PBF is systematically mapped using a microstructure analytics framework built on orientation-corrected pseudo-3D EBSD. Three processing degrees of freedom are explored: beam current, dwell time, and scanning strategy. A global coordinate system is enforced across three orthogonal cross sections, enabling consistent evaluation of grain morphology, crystallographic texture, and lack of fusion (LOF) porosity via percentile-based aspect ratio, grain size, misorientation, and pore-fraction descriptors. At fixed beam energy, comparison of structured (snake, single-direction) and nonstructured (single-direction-shifted, stochastic) patterns demonstrates that increasing spatial and temporal randomness disrupts thermal field coherence, suppresses epitaxial grain extension, and promotes fine equiaxed morphologies. Extending the analysis to a two-dimensional beam-current-dwell-time matrix under stochastic spot melting, experimentally determined process maps reveal a narrow processing window in which defect-lean, equiaxed, and nearly isotropic microstructures are obtained. This window is bounded on one side by insufficient energy input causing LOF defects, and on the other by excessive energy input driving strong morphological and crystallographic texture and abnormal grain growth. The results demonstrate that dwell time primarily governs crystallographic texture, whereas beam current and dwell time jointly control grain morphology and defect formation.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the Effect of Creep on Local Lattice Orientation in Single-Crystal Ni-Based Superalloy Microstructures","authors":"E. J. Payton,&nbsp;E. B. Dursun,&nbsp;G. Eggeler,&nbsp;L. Agudo Jácome","doi":"10.1002/adem.71119","DOIUrl":"https://doi.org/10.1002/adem.71119","url":null,"abstract":"<p>In the present work, we use electron backscatter diffraction (EBSD) in the scanning electron microscope (SEM) to study the evolution of local misorientations in the <i>γ</i>/<i>γ</i>′ microstructure of a single-crystal Ni-based superalloy after exposures to creep conditions in the high temperature and low stress field. Sampling fields of statistically relevant dimensions were evaluated (16 × 12 µm², corresponding to almost 1000 γ′ particles in the initial state). We apply a new method that allows for differentiation between diffraction signals from γ and γ′ phase regions. The spatial relationships between locations where misorientation accumulation occurs are investigated for dendritic and interdendritic regions loaded along the [001] and [110] crystallographic directions. Increases in intra- and interphase misorientation are observed as dislocation density increases, then saturates. The higher dislocation densities in γ channels than in <i>γ</i>′ particles seen by transmission electron microscopy are shown to be statistically stored on the micron size scale. Geometrically necessary misorientations are observed to cancel each other out over the macroscopic scale, resulting in no detectable macroscopic change in crystal orientation for total accumulated plastic strains of 6%. The limitations of the methods are discussed, and areas in need of further work are highlighted.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.71119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Back Cover: In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy (Adv. Eng. Mater. 17/2026)","authors":"Ujjval Bansal,&nbsp;Tae-Hyeok Kang,&nbsp;Pyuck-Pa Choi,&nbsp;Subin Lee,&nbsp;Christoph Kirchlechner","doi":"10.1002/adem.71206","DOIUrl":"https://doi.org/10.1002/adem.71206","url":null,"abstract":"<p><b>Composite γ′/γ″ Precipitates</b></p><p>Using in situ micropillar compression, this work demonstrates that a bimodal distribution of γ/γʹ/γʺ composite precipitate assemblies in Ni-Cr-Al-Nb alloys delivers remarkable strength at room and elevated temperature. Post-deformation atomic-resolution HAADF-STEM imaging uncovers the deformation pathway: intrinsic stacking faults (ISF) in γʺ paired with superlattice ISF in γʹ, establishing precipitate shearing as dominant mechanism across all precipitate sizes. More details can be found in the Research Article by Subin Lee and co-workers (DOI: 10.1002/adem.70862).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.71206","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Multimodal Data-Driven Microstructure Characterization","authors":"Qi Zhang,&nbsp;Santiago Benito,&nbsp;Özge Özgün,&nbsp;Sebastian Weber,&nbsp;Markus Stricker","doi":"10.1002/adem.202503154","DOIUrl":"https://doi.org/10.1002/adem.202503154","url":null,"abstract":"<p>Electron backscatter diffraction is one of the most prevalent techniques used for microstructural characterization. In recent years, there has been an increase in the use of data-driven methods to analyze raw Kikuchi patterns. However, most of these require user input and the interpretation of the data-derived features is often challenging and subject to <i>informed interpretation</i>. By using a combination of principal component analysis, constrained nonnegative matrix factorization, and a variational autoencoder along with information-theoretical considerations on a multimodal dataset, it is shown that a) automated decision on method-specific hyperparameters, here the number of components in principal component analysis, the number of components for constrained nonnegative matrix factorization, and the selection of reference constraints and b) latent space features can be mapped to physically meaningful quantities. In addition, the recommended region-of-interest size for optimal model performance is approximated automatically to be twice the characteristic grain size based on information content of the dataset. Implemented in a workflow, this allows for a transferable, dataset-specific autonomous data-driven phase and grain segmentation including grain boundary detection and the analysis of very-small-angle intra-grain variations to complement conventional electron backscatter analysis.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202503154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Editorial for the Special Issue on the Occasion of Gunther Eggeler's 70th Birthday","authors":"Birgit Skrotzki,&nbsp;Leonardo Agudo Jácome,&nbsp;Alexander Kauffmann","doi":"10.1002/adem.71144","DOIUrl":"https://doi.org/10.1002/adem.71144","url":null,"abstract":"&lt;p&gt;(Photo credits: Nielinger, 2025)&lt;/p&gt;&lt;p&gt;On the occasion of Prof. Gunther Eggeler's 70th birthday, it is a distinct honor and privilege to dedicate this special issue to an outstanding scientist who defined new standards in how to characterize microstructural evolution in functional and structural engineering materials and how to link elementary microstructural processes to material properties.&lt;/p&gt;&lt;p&gt;Gunther has made a career in materials science and engineering, which is characterized by excellent teaching and a keen interest in the elementary processes that govern relevant deformation and transformation processes in advanced functional and structural materials. At different stages of his more than thirty years at the Chair for Materials Science and Engineering (Lehrstuhl Werkstoffwissenschaft) of Ruhr University Bochum (RUB), we have worked with him closely. Here, we give a brief account of facts and figures about him and his work, which we think he would consider important. As it is not possible to describe his more than 500 publications in this appreciation, we selected some contributions that characterize different periods of his career and major research topics.&lt;/p&gt;&lt;p&gt;Gunther was born in September 1956 in Mülheim an der Ruhr, North Rhine-Westphalia, with an Austrian passport. In 1965, his family moved to Erlangen, Bavaria, where his father joined the newly established research center of Siemens/Kraftwerk Union (KWU). There, he later joined the Ohm-Gymnasium Erlangen with a focus on natural sciences. Gunther obtained his Abitur in 1975. Amongst his many interests were playing guitar, working in a Jazz club, and playing basketball. Originally wanting to study mineralogy, a friend convinced him to try materials science, a subject that had been newly founded at the Friedrich-Alexander-University Erlangen-Nürnberg (FAU). Like many others, he was profoundly inspired by Prof. Bernhard Ilschner, whose fascinating classes strongly motivated him. He chose General Materials Science as the major subject and Physical Chemistry (with Prof. Gerd Wedler) and Corrosion (with Prof. Helmut Kaesche) as minors, not realizing at the time that he would benefit from this choice throughout his career.&lt;/p&gt;&lt;p&gt;For his diploma thesis (final degree Dipl.-Ing.), he joined Prof. Wolfgang Blum's research group to investigate the evolution of the dislocation structure during creep of NaCl single crystals. This work resulted in his first publication in 1981 [&lt;span&gt;1&lt;/span&gt;]. During this time, he gained a solid understanding of the materials science of creep. In 1981, he also married his wife, Gabriele, who consistently supported him throughout his entire career and always had his back. Gunther performed his doctoral thesis at the chair of Prof. Kaesche, where he worked on Thermodynamics and Kinetics of the Reaction of Steel with Aluminum melts [&lt;span&gt;2&lt;/span&gt;].&lt;/p&gt;&lt;p&gt;After earning his Dr.-Ing. degree in 1984, he accepted an offer for a postdoc position from Prof. Ilschner, ","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.71144","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Solid-State Diffusion and Intermetallic Phase Formation in Roll-Bonded Mg–Zn Composites With Kirigami-Patterned Inlay","authors":"Yaroslav Frolov,&nbsp;Oleksandr Bobukh,&nbsp;Christian Klose,&nbsp;Florian Nürnberger,&nbsp;Hans Jürgen Maier","doi":"10.1002/adem.202502977","DOIUrl":"https://doi.org/10.1002/adem.202502977","url":null,"abstract":"<p>Solid-state diffusion and intermetallic phase formation were examined in roll-bonded magnesium alloy–zinc (Mg–Zn) composites that contain a <i>kirigami</i>-patterned magnesium alloy (ZX10) inlay. The <i>kirigami</i>-patterned inlay was embedded between two zinc sheets and roll-bonded at 310°C. Subsequent heat treatments at 318°C and 328°C promoted interfacial diffusion as well as the formation of intermetallic phases. The <i>kirigami</i> geometry of the inlay was employed as a process-level tool to impose spatially inhomogeneous deformation during roll bonding. This caused localized stress concentrations, driving the controlled transformation of the initial pattern within the deformation zone. It also prevented the thin inlay from failing prematurely and ensured its controlled distribution along the sample. Inhomogeneous strain distribution introduced three-dimensional diffusion pathways that activated bonding and initiated phase transformation. Flexural testing revealed a significant increase in mechanical strength compared to values calculated using the rule of mixtures. The maximum strength observed was 100 MPa for samples heat-treated at 318°C. Microstructural analyses showed a progression from adhesive bonding (group A) to uniform intermetallic layers (group B) and complex, multiphase regions containing eutectic, dendritic, and porous fractions (group C). Energy-dispersive X-ray spectroscopy confirmed zinc diffusion into the magnesium solid solution, indicating the onset of solid-state alloying. The combined effects of plastic deformation, thermal activation, and the <i>kirigami</i>-patterned Zn inlay resulted in Mg–Zn composites with enhanced interfacial integrity and a tailored phase composition. These composites offer a promising pathway for advanced material compounds to be used in biomedical and mechanical applications.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"28 17","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202502977","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}