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Stress-driven Volta potential evolution in Ti-6Al-4 V Alloys: A multiscale bridge between crystallography and corrosion susceptibility 应力驱动的ti - 6al - 4v合金伏特电位演变:晶体学与腐蚀敏感性之间的多尺度桥梁
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-04 DOI: 10.1016/j.scriptamat.2025.116838
Hongbo Zhang , Shi Zheng , Shuhui Chen , Yuming Lai , Wenchao Li , Hai Chang , Feifei Huang , Wenyue Zhang , Min Liu , Dongbai Sun , Zilong Zhao , Ke Yang , Jinkui Zhao , Ying Jin
{"title":"Stress-driven Volta potential evolution in Ti-6Al-4 V Alloys: A multiscale bridge between crystallography and corrosion susceptibility","authors":"Hongbo Zhang ,&nbsp;Shi Zheng ,&nbsp;Shuhui Chen ,&nbsp;Yuming Lai ,&nbsp;Wenchao Li ,&nbsp;Hai Chang ,&nbsp;Feifei Huang ,&nbsp;Wenyue Zhang ,&nbsp;Min Liu ,&nbsp;Dongbai Sun ,&nbsp;Zilong Zhao ,&nbsp;Ke Yang ,&nbsp;Jinkui Zhao ,&nbsp;Ying Jin","doi":"10.1016/j.scriptamat.2025.116838","DOIUrl":"10.1016/j.scriptamat.2025.116838","url":null,"abstract":"<div><div>This study presents a multiscale approach integrating in situ Scanning Kelvin Probe Force Microscopy (SKPFM), synchrotron High-Energy X-ray Diffraction (HE-XRD), Finite Element Modeling (FEM), and Density Functional Theory (DFT) simulations to investigate the stress-driven evolution of Volta potentials in Ti-6Al-4 V (TC4) alloy. In situ SKPFM measurements show that both α and β phases exhibit a progressive reduction in Volta potential under mechanical loading, with a corresponding increase in Volta potential difference (VPD). Crystallographic strain anisotropy governs potential changes during the elastic regime, while dislocation motion dominates in the plastic regime. FEM simulations quantify stress localization, while HE-XRD provides phase-resolved strain data to calibrate FEM and DFT models. DFT simulations confirm the role of strain in the elastic stage, but highlight the shift to dislocation-driven effects in the plastic stage. This work reveals how mechanical deformation alters surface electronic structure, offering insights into localized degradation and alloy design for SCC resistance.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116838"},"PeriodicalIF":5.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Probing the effect of solute hydrogen and hydrides on the prismatic slip of [21‾1‾0]-orientated alpha titanium using in-situ micropillar compression 利用原位微柱压缩探讨溶质氢和氢化物对[21 - 1 - 0]取向α钛的棱柱滑移的影响
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-04 DOI: 10.1016/j.scriptamat.2025.116859
Mehmet Fazil Kapci , Liesbet Deconinck , Antonio Alvaro , Roy Johnsen , Zhiliang Zhang , Xu Lu
{"title":"Probing the effect of solute hydrogen and hydrides on the prismatic slip of [21‾1‾0]-orientated alpha titanium using in-situ micropillar compression","authors":"Mehmet Fazil Kapci ,&nbsp;Liesbet Deconinck ,&nbsp;Antonio Alvaro ,&nbsp;Roy Johnsen ,&nbsp;Zhiliang Zhang ,&nbsp;Xu Lu","doi":"10.1016/j.scriptamat.2025.116859","DOIUrl":"10.1016/j.scriptamat.2025.116859","url":null,"abstract":"<div><div>In-situ micropillar compression tests were performed on the <span><math><mrow><mo>[</mo><mrow><mn>2</mn><mover><mn>1</mn><mo>¯</mo></mover><mover><mn>1</mn><mo>¯</mo></mover><mn>0</mn></mrow><mo>]</mo></mrow></math></span>-oriented alpha titanium micropillars to investigate the effect of solute hydrogen and titanium hydrides on the activation of prismatic slip <span><math><mrow><mo>(</mo><mrow><mo>〈</mo><mn>11</mn><mover><mrow><mn>2</mn></mrow><mo>‾</mo></mover><mn>0</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>10</mn><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover><mn>0</mn><mo>}</mo></mrow><mo>)</mo></mrow></math></span>. The formation of the hydride phase and the deformation mechanisms in air, in the presence of solute hydrogen and the hydrides were characterized by high-resolution scanning electron microscope (SEM) and scanning transmission electron microscope (STEM). The results revealed that the presence of solute hydrogen reduced the critical resolved shear stress (CRSS) for prismatic slip and enhanced the formation of stacking faults. Conversely, hydride formation in the micropillars increased the yield stress, followed by strain hardening due to strain incompatibility. Slip transmission across the hydride phase occurred upon increasing plastic slip, ultimately leading to a brittle failure.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116859"},"PeriodicalIF":5.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interstitials as a key ingredient for P segregation to grain boundaries in polycrystalline α-Fe 间隙是α-Fe多晶中P向晶界偏析的关键因素
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-04 DOI: 10.1016/j.scriptamat.2025.116864
Amin Reiners-Sakic , Alexander Reichmann , Christoph Dösinger , Lorenz Romaner , David Holec
{"title":"Interstitials as a key ingredient for P segregation to grain boundaries in polycrystalline α-Fe","authors":"Amin Reiners-Sakic ,&nbsp;Alexander Reichmann ,&nbsp;Christoph Dösinger ,&nbsp;Lorenz Romaner ,&nbsp;David Holec","doi":"10.1016/j.scriptamat.2025.116864","DOIUrl":"10.1016/j.scriptamat.2025.116864","url":null,"abstract":"<div><div>Solute segregation to grain boundaries (GBs) significantly impacts material behavior, with most studies focusing on substitutional solute segregation while neglecting interstitial segregation due to its increased complexity. The site preference, interstitial or substitutional, for P segregation in <em>α</em>-Fe still remains under debate. This work investigates both substitutional and interstitial GB segregation in a polycrystalline model using classical interatomic potentials and machine learning. The method is validated with H and Ni, whose segregation behaviors are well understood. For P, we find segregation to both GB site types, with a preference for substitutional sites based on mean segregation energy. However, the abundance of interstitial sites means interstitial segregation also significantly contributes to the GB enrichment with P. This highlights the importance of considering interstitial P segregation alongside substitutional segregation. Additionally, obtaining a representative spectrum of segregation energies is crucial for accurate, experimentally aligned predictions.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116864"},"PeriodicalIF":5.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Surface dislocations in a Fe2VAl Heusler alloy: Formation and effects on electrical resistivity Fe2VAl Heusler合金的表面位错:形成及其对电阻率的影响
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-04 DOI: 10.1016/j.scriptamat.2025.116860
Fadi Saied Ahmad , Amram Azulay , Gautam Kumar , Yaron Amouyal , Hanna Bishara
{"title":"Surface dislocations in a Fe2VAl Heusler alloy: Formation and effects on electrical resistivity","authors":"Fadi Saied Ahmad ,&nbsp;Amram Azulay ,&nbsp;Gautam Kumar ,&nbsp;Yaron Amouyal ,&nbsp;Hanna Bishara","doi":"10.1016/j.scriptamat.2025.116860","DOIUrl":"10.1016/j.scriptamat.2025.116860","url":null,"abstract":"<div><div>Dislocation density impacts functional properties of materials. For hard materials, introducing dislocations is normally challenging due to crack formation. Here, we use mechanical grinding and nanoindentation techniques to form near-surface dislocations in Fe<sub>2</sub>VAl. Transmission electron microscopy shows that 2 × 10<sup>14</sup> and 3 × 10<sup>13</sup> m<sup>-2</sup> are present at 1 μm away from the surface, respectively. Local four-point probe electrical measurements indicate that the electrical resistivities for pristine, indented, and ground regions are 3.9, 4.2, and 7.5 ± 0.1 μΩ cm, respectively, confirming that dislocations significantly impede charge transport. The relation between resistivity and dislocation density is discussed in terms of the interaction between electrons and the strain fields induced by dislocations. Additionally, we determine that the elastic modulus and nanohardness for the pristine alloy are 225 ± 5 GPa and 6.6 ± 0.1 GPa, respectively. This study demonstrates that surface mechanical treatments can be used to control the electrical resistivity of these alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116860"},"PeriodicalIF":5.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intrinsic property of defective β-Ga2O3 to self-heal under ionizing irradiation 电离辐照下缺陷β-Ga2O3自愈特性研究
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-04 DOI: 10.1016/j.scriptamat.2025.116858
D. Iancu , E. Zarkadoula , V. Leca , A. Hotnog , Y. Zhang , W.J. Weber , G. Velişa
{"title":"Intrinsic property of defective β-Ga2O3 to self-heal under ionizing irradiation","authors":"D. Iancu ,&nbsp;E. Zarkadoula ,&nbsp;V. Leca ,&nbsp;A. Hotnog ,&nbsp;Y. Zhang ,&nbsp;W.J. Weber ,&nbsp;G. Velişa","doi":"10.1016/j.scriptamat.2025.116858","DOIUrl":"10.1016/j.scriptamat.2025.116858","url":null,"abstract":"<div><div>Damage evolution and phase stability in defective <em>β</em>-Ga<sub>2</sub>O<sub>3</sub> and an irradiation-converted <em>γ-</em>Ga<sub>2</sub>O<sub>3</sub> layer have been studied under ionizing irradiation at 300 K. By exploring athermal nonequilibrium processes in <em>β</em>-Ga<sub>2</sub>O<sub>3</sub>, we succeed in identifying a self-healing mechanism that enables defect recovery, characterized by a recovery cross-section of ∼0.17 nm<sup>2</sup>. Remarkably, this study further demonstrates that the crystallinity of the irradiation-converted <em>γ-</em>Ga<sub>2</sub>O<sub>3</sub> layer improves under ionizing irradiation. More importantly, X-ray diffraction analysis reveals that the highly-strained <span><math><mi>γ</mi></math></span> -phase transforms into a highly-crystalline structure without film disintegration, contrasting to that reported for isochronal annealing at 1000 K. The inelastic thermal spike calculations provide insights into the important effects of energy transfer to electrons in reordering the local atomic arrangement of both defective <em>β</em>- Ga<sub>2</sub>O<sub>3</sub> and <span><math><mi>γ</mi></math></span>-Ga<sub>2</sub>O<sub>3</sub>. This behavior suggests a pathway for low-temperature crystallization, offering a promising strategy for fabricating ultrahigh-speed non-volatile memory devices.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116858"},"PeriodicalIF":5.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comments on "Toward prediction and insight of porosity formation in laser welding: A physics-informed deep learning framework" 对“激光焊接中孔隙形成的预测和洞察:一个基于物理的深度学习框架”的评论
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-03 DOI: 10.1016/j.scriptamat.2025.116857
Souichi Oka , Yoshiyasu Takefuji
{"title":"Comments on \"Toward prediction and insight of porosity formation in laser welding: A physics-informed deep learning framework\"","authors":"Souichi Oka ,&nbsp;Yoshiyasu Takefuji","doi":"10.1016/j.scriptamat.2025.116857","DOIUrl":"10.1016/j.scriptamat.2025.116857","url":null,"abstract":"<div><div>Meng et al. (2025) introduce a physics-informed deep learning (PIDL) framework for predicting porosity in aluminum alloy laser welding. Their PIDL model, assessed via SHAP, exhibited superior predictive performance over conventional deep learning models, demonstrated by a 41% reduction in mean square error (MSE). However, feature importances derived from SHAP may be biased, potentially misrepresenting the genuine physical influences on porosity formation. High predictive accuracy does not automatically ensure the reliability of feature importance metrics. This letter underscores the critical need for rigorous statistical validation for reliable feature importance assessments. Integrating robust statistical methods like Spearman's rho, Goodman-Kruskal's gamma, Kendall's tau, and Somers' delta with machine learning enhances the credibility of insights in materials science and manufacturing. Future research should focus on combining ML with robust statistical analysis to improve feature importance reliability and deepen understanding of underlying physical mechanisms.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116857"},"PeriodicalIF":5.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
〈a〉 screw dislocation triggered {101¯1} twinning in magnesium <一个>螺钉位错触发了镁中的{101¯1}孪晶
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-03 DOI: 10.1016/j.scriptamat.2025.116853
Xin-Yao Li , Ya-Fang Guo , Xiao-Zhi Tang , Jian Wang
{"title":"〈a〉 screw dislocation triggered {101¯1} twinning in magnesium","authors":"Xin-Yao Li ,&nbsp;Ya-Fang Guo ,&nbsp;Xiao-Zhi Tang ,&nbsp;Jian Wang","doi":"10.1016/j.scriptamat.2025.116853","DOIUrl":"10.1016/j.scriptamat.2025.116853","url":null,"abstract":"<div><div>Twin nucleation in hexagonal metals is generally described by successive nucleation and gliding of twinning dislocations/disconnections (TDs). Unusual nucleation mechanisms, such as pure-shuffle mechanism for <span><math><mrow><mo>{</mo><mn>10</mn><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover><mn>2</mn><mo>}</mo></mrow></math></span> twins and kinking mechanism for <span><math><mrow><mo>{</mo><mrow><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>1</mn></mrow><mo>}</mo></mrow></math></span> twins, had been proposed based on experimental observations and atomistic simulations. Here, we reported screw dislocation enabled <span><math><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>1</mn></mrow><mo>}</mo></mrow></math></span> twinning mechanisms in magnesium based on atomistic simulations. A <span><math><mrow><mo>〈</mo><mi>a</mi><mo>〉</mo></mrow></math></span> screw dislocation can have a planar spread core on basal plane or develop into a <span><math><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>1</mn></mrow><mo>}</mo></mrow></math></span> twin embryo via a cross-slip mechanism. The cross-slip enabled <span><math><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>1</mn></mrow><mo>}</mo></mrow></math></span> twinning mechanism is favored when the basal slip is constrained or suppressed at a high strain condition. This mechanism addresses the experimental puzzle of the <span><math><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>1</mn></mrow><mo>}</mo></mrow></math></span> twin absence under <em>c</em>-axis compression.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116853"},"PeriodicalIF":5.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Solute segregation governed atomistic configuration of β-Mg2Si/α-Al interface in an Al alloy 溶质偏析控制了铝合金中β-Mg2Si/α-Al界面的原子构型
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-02 DOI: 10.1016/j.scriptamat.2025.116845
Chun Guo , Shiwei Pan , Feng Qian , Chunan Li , Shun Xu , Xingwang Cheng , Yanjun Li
{"title":"Solute segregation governed atomistic configuration of β-Mg2Si/α-Al interface in an Al alloy","authors":"Chun Guo ,&nbsp;Shiwei Pan ,&nbsp;Feng Qian ,&nbsp;Chunan Li ,&nbsp;Shun Xu ,&nbsp;Xingwang Cheng ,&nbsp;Yanjun Li","doi":"10.1016/j.scriptamat.2025.116845","DOIUrl":"10.1016/j.scriptamat.2025.116845","url":null,"abstract":"<div><div>β-Mg<sub>2</sub>Si is a common intermetallic phase in commercial Al alloys, which can influence the precipitation of age-hardening phases and mechanical properties. In this work, β-Mg<sub>2</sub>Si dispersoid formed in a novel multi-components Al-Mg-Zn based crossover alloy during homogenization has been explored in detail. It is found that β-Mg<sub>2</sub>Si owns a rarely observed cube-cube orientation relationship (OR) of [001]<sub>β</sub>//[001]<sub>Al</sub>, (100)<sub>β</sub>//(100)<sub>Al</sub> with Al matrix, while a Si-terminated {100} interface layer can be identified. More strikingly, it is revealed that β-Mg<sub>2</sub>Si/Al-matrix interfaces acted as preferential segregation sites for Zr, Zn and Cu atoms, causing heterogeneous nucleation of Al<sub>3</sub>Zr and T-(Al,Zn,Cu)<sub>49</sub>Mg<sub>32</sub> phases at the interfaces. Resultantly, the growth of β-Mg<sub>2</sub>Si could be slowed down with their transition from cube-cube to Kanno OR being hindered. The underlying mechanisms have been revealed by applying first principles calculations of segregation energies of solute atoms based on the atomistic interfacial configuration.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116845"},"PeriodicalIF":5.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phase transformation pathways in BCC-B2 superalloys BCC-B2高温合金的相变途径
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-01 DOI: 10.1016/j.scriptamat.2025.116734
Vishal Soni , Yunzhi Wang , Jean-Philippe Couzinié , Hamish L. Fraser , Rajarshi Banerjee
{"title":"Phase transformation pathways in BCC-B2 superalloys","authors":"Vishal Soni ,&nbsp;Yunzhi Wang ,&nbsp;Jean-Philippe Couzinié ,&nbsp;Hamish L. Fraser ,&nbsp;Rajarshi Banerjee","doi":"10.1016/j.scriptamat.2025.116734","DOIUrl":"10.1016/j.scriptamat.2025.116734","url":null,"abstract":"<div><div>The development of high-temperature materials requires a deep understanding of phase transformations governing microstructural stability and mechanical properties. BCC+B2 superalloys, inspired by the γ/γ′ microstructure in Ni-based superalloys, feature a ductile BCC matrix with coherent B2 precipitates that enhance high-temperature strength and creep resistance. This article examines the thermodynamics and phase transformation pathways leading to BCC+B2 microstructures in ferritic and refractory superalloys. Their stability depends on miscibility gaps, lattice misfit, elastic modulus contrast, and site occupancies. Ferritic superalloys (Fe-Al-based) are suited for applications below 1000 °C, while refractory superalloys target extreme temperatures (1300 °C–1800 °C). However, challenges remain in phase stability, oxidation resistance, and creep performance. Strategies for microstructural control through heat treatment, phase-field modeling, and CALPHAD-based design are discussed. Enhancing these aspects will optimize BCC+B2 superalloys for aerospace, energy, and defense applications, providing a pathway for next-generation materials designed for extreme environments.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116734"},"PeriodicalIF":5.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unveiling the deformation mechanisms of BCC-superalloys 揭示bcc -高温合金的变形机理
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2025-07-01 DOI: 10.1016/j.scriptamat.2025.116801
Jean-Philippe Couzinié , Gopal Viswanathan , Vishal Soni , Rajarshi Banerjee , Hamish L. Fraser , Michael J. Mills
{"title":"Unveiling the deformation mechanisms of BCC-superalloys","authors":"Jean-Philippe Couzinié ,&nbsp;Gopal Viswanathan ,&nbsp;Vishal Soni ,&nbsp;Rajarshi Banerjee ,&nbsp;Hamish L. Fraser ,&nbsp;Michael J. Mills","doi":"10.1016/j.scriptamat.2025.116801","DOIUrl":"10.1016/j.scriptamat.2025.116801","url":null,"abstract":"<div><div>Body centered cubic (bcc)-superalloys – exploiting a two-phase microstructure composed of bcc matrix strengthened by coherent ordered precipitates – are emerging as a promising class of materials for high-temperature applications. Such alloys offer significant advantages especially in iron- and refractory-based systems, due to high melting points and superior mechanical strength. However, they often face critical challenges including limited ductility and toughness, phase instability or environmental vulnerability. Developing these alloys requires an integrated approach, from design to property assessment, and an in-depth understanding of deformation and strengthening mechanisms operating in the main phases across different scales.</div><div>This viewpoint article addresses the reported deformation mechanisms in bcc-superalloys with a particular focus on precipitation strengthening and dislocation interactions, and it proposes future research directions. Key aspects such as the transition between mechanisms, the role of the antiphase boundary energy, and the effect of chemical complexity especially in advanced refractory alloys remain open questions.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116801"},"PeriodicalIF":5.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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