Scripta Materialia最新文献_第3页

Achieving strength-ductility synergy in additive manufactured α+β titanium alloys through multi-scale microstructure regulation 增材制造α+β钛合金的多尺度组织调控实现强度-延性协同效应

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-23 DOI: 10.1016/j.scriptamat.2025.117006

Zishuo Ma , Qi An , Baoqi Guo , Delong Gong , Yuyang Liu , Lihua Cui , Rui Zhang , Shuai Wang , Jiayi Jin , Lujun Huang

{"title":"Achieving strength-ductility synergy in additive manufactured α+β titanium alloys through multi-scale microstructure regulation","authors":"Zishuo Ma , Qi An , Baoqi Guo , Delong Gong , Yuyang Liu , Lihua Cui , Rui Zhang , Shuai Wang , Jiayi Jin , Lujun Huang","doi":"10.1016/j.scriptamat.2025.117006","DOIUrl":"10.1016/j.scriptamat.2025.117006","url":null,"abstract":"<div><div>Additive manufactured high-temperature titanium alloys typically exhibit poor plasticity and crack sensitivity. In this work, a novel strategy incorporating high-melting-point, low-diffusivity tungsten (W) as a microstructural modifier was designed for Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy, with subsequent processing by laser powder bed fusion. At the mesoscale, the columnar prior β-grains of the alloys transformed to fine equiaxed-elongated morphology and formed a bimodal structure. Microscale characterization revealed that the α’ phases were refined while the brittle α’/β interfaces were replaced with more ductile boundaries. Notably, the modified alloys achieved an outstanding tensile strength of 1717.6 MPa along with an improved elongation of 4.4%, which is attributed to the synergistic effects of grain structure and interface optimization. The present work proposes a promising approach for regulating the microstructure and mechanical properties of high-temperature titanium alloys by refractory elements.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117006"},"PeriodicalIF":5.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119224","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

In situ TEM annealing of neutron-irradiated Ti reveals a two-stage mechanism for elevated temperature radiation damage recovery 中子辐照钛的原位TEM退火揭示了高温辐射损伤恢复的两阶段机制

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-22 DOI: 10.1016/j.scriptamat.2025.117001

Charles A. Hirst , Boopathy Kombaiah , Ian L. Steigerwald , Kevin G. Field , Michael P. Short

{"title":"In situ TEM annealing of neutron-irradiated Ti reveals a two-stage mechanism for elevated temperature radiation damage recovery","authors":"Charles A. Hirst , Boopathy Kombaiah , Ian L. Steigerwald , Kevin G. Field , Michael P. Short","doi":"10.1016/j.scriptamat.2025.117001","DOIUrl":"10.1016/j.scriptamat.2025.117001","url":null,"abstract":"<div><div>Understanding how irradiation-induced defects evolve at elevated temperatures is of critical importance to predicting materials' behavior under steady-state and accident scenarios. However, such mechanistic insight into microstructural evolution is limited by the nature of <em>ex situ</em> annealing and subsequent imaging. Here we show direct observation and quantification of defect recovery in neutron-irradiated Ti using <em>in situ</em> transmission electron microscopy (TEM) annealing experiments. In agreement with our prior work, and at temperatures below the irradiation temperature (T<span><math><msub><mrow></mrow><mrow><mi>i</mi><mi>r</mi><mi>r</mi></mrow></msub></math></span> = 300°C), dislocation loops are observed to glide. At elevated temperatures (>500°C), dislocation lines become mobile and promote significant recovery of the microstructure. These mechanisms challenge the established electron irradiation-based model for radiation damage recovery, which originally suggests dissolution of static defect clusters, and demonstrates the importance of <em>in situ</em> characterization in understanding defect evolution in irradiated materials.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117001"},"PeriodicalIF":5.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119228","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

Enhanced strengthening via nanoscale composition modulation 通过纳米级成分调制增强强化

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-22 DOI: 10.1016/j.scriptamat.2025.116999

Manish Jain , Paul G. Kotula , Kyle Dorman , Saaketh Desai , Sadhvikas Addamane , David P. Adams , Frank W. DelRio , Remi Dingreville , Brad L. Boyce

{"title":"Enhanced strengthening via nanoscale composition modulation","authors":"Manish Jain , Paul G. Kotula , Kyle Dorman , Saaketh Desai , Sadhvikas Addamane , David P. Adams , Frank W. DelRio , Remi Dingreville , Brad L. Boyce","doi":"10.1016/j.scriptamat.2025.116999","DOIUrl":"10.1016/j.scriptamat.2025.116999","url":null,"abstract":"<div><div>This work investigates the origins of strengthening in nanocrystalline Pt-Au thin films. Drawing from a previous high-throughput combinatorial survey of 784 candidate films, five distinct films were selected for detailed analysis. Microstructural characterization using transmission electron microscopy, energy-dispersive X-ray spectroscopy, x-ray diffraction, x-ray reflectivity, and automated crystal orientation mapping was used to quantify contributions from grain size, solute content, texture, density, and dislocation content. In addition to those sources, the highest hardness film benefited from nanoscale composition modulations, outperforming comparable Pt-Au alloys that lacked composition modulation. The modulations are akin to spinodal decomposition microstructures, though distinct in their formation mechanism. This work provides a forensic analysis of how subtle, nanoscale chemical features, identified through combinatorial exploration and subsequent detailed analysis, can influence the mechanical properties of alloy systems.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 116999"},"PeriodicalIF":5.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119227","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

Crystallographic orientation and variant selection of trimodal microstructure in dual-phase Mg-Li alloy after solid solution treatment 固溶处理后双相Mg-Li合金三峰组织的结晶取向及变异选择

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-22 DOI: 10.1016/j.scriptamat.2025.117004

Xue Zhang , Kun Yang , Weiwu Bai , Guo Li , Guobing Wei , Weidong Xie , Hao Chen , Yan Yang , Xiaodong Peng

{"title":"Crystallographic orientation and variant selection of trimodal microstructure in dual-phase Mg-Li alloy after solid solution treatment","authors":"Xue Zhang , Kun Yang , Weiwu Bai , Guo Li , Guobing Wei , Weidong Xie , Hao Chen , Yan Yang , Xiaodong Peng","doi":"10.1016/j.scriptamat.2025.117004","DOIUrl":"10.1016/j.scriptamat.2025.117004","url":null,"abstract":"<div><div>The orientation relationship (OR) between precipitated needle-shaped α'-Mg and matrix β-Li in a dual-phase Mg–Li alloy has been investigated. Most α'-Mg within the interior of β-Li matrix (α<sub>M</sub>'-Mg) follow the Burgers OR: <span><math><mrow><mrow><mrow><mo>{</mo><mn>0001</mn><mo>}</mo></mrow><mo>∥</mo><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow><mo>,</mo><mspace></mspace></mrow><mrow><mo>〈</mo><mrow><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn></mrow><mo>〉</mo></mrow><mrow><mo>∥</mo></mrow><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow></mrow></math></span>, while α'-Mg at phase boundaries (α<sub>PB</sub>'-Mg) deviate from the Burgers OR, forming specific angles with the original α-Mg in the common <span><math><mrow><mo>〈</mo><mrow><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn></mrow><mo>〉</mo></mrow></math></span> direction. When the OR between the original α-Mg and β-Li is closer to the Burgers OR, more α<sub>PB</sub>′-Mg with the same orientation as the original α-Mg precipitate, which generates a strong variant selection for α<sub>M</sub>'-Mg that follows the Burgers OR. These α<sub>M</sub>'-Mg preferentially precipitate when they share common <span><math><mrow><mo>〈</mo><mrow><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn></mrow><mo>〉</mo></mrow></math></span> direction with α'-Mg that deviate from the Burgers OR to minimize overall strain. With increasing solid solution time, the increased α<sub>M</sub>'-Mg that deviate from the Burgers OR reduces deformation compatibility across phase boundaries, leading to diminished ductility.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117004"},"PeriodicalIF":5.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119226","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

Searching for evidence of strengthening from short-range order in the CrCoNi medium entropy alloy 在CrCoNi中熵合金中寻找短时阶强化的证据

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-19 DOI: 10.1016/j.scriptamat.2025.116997

Novin Rasooli, Matthew Daly

引用次数: 0

A new high-toughness Co-based nanocrystalline soft-magnetic alloy capable of large stress-induced anisotropy 具有大应力诱导各向异性的新型高韧性钴基纳米晶软磁合金

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-19 DOI: 10.1016/j.scriptamat.2025.116998

N.M. Bruno , V. Keylin , G. Feichter , A.M. Leary , R.D. Noebe

{"title":"A new high-toughness Co-based nanocrystalline soft-magnetic alloy capable of large stress-induced anisotropy","authors":"N.M. Bruno , V. Keylin , G. Feichter , A.M. Leary , R.D. Noebe","doi":"10.1016/j.scriptamat.2025.116998","DOIUrl":"10.1016/j.scriptamat.2025.116998","url":null,"abstract":"<div><div>Mechanical and magnetic properties for a new Co-base nanocrystalline soft magnetic alloy, Co<sub>80</sub>Fe<sub>1.5</sub>Mn<sub>1.5</sub>Nb<sub>8</sub>Si<sub>2</sub>B<sub>7</sub> at.%, are compared to those of previously studied Co<sub>(80–2x)</sub>-Fe<sub>x</sub>−Mn<sub>x</sub>-Nb<sub>4</sub>-Si<sub>2</sub>-B<sub>14</sub> at.% (where <em>x</em> = 2.3, 2.7, and 4) as cast and stress-annealed ribbons. The new alloy exhibits a fracture toughness,<span><math><mrow><mspace></mspace><msub><mi>K</mi><mi>C</mi></msub></mrow></math></span>, of 58 MPa<span><math><msqrt><mi>m</mi></msqrt></math></span> after stress-annealing at 500 °C and a stress-induced/stress-normalized magnetic anisotropy, <span><math><mrow><msub><mi>K</mi><mi>u</mi></msub><mo>/</mo><mi>σ</mi></mrow></math></span>, of 0.094 kJ/(MPa<span><math><mrow><mo>·</mo><msup><mrow><mi>m</mi></mrow><mn>3</mn></msup></mrow></math></span>), i.e., a value nearly double that of other Co-base nanocrystalline alloys. The bulk magnetostriction, <span><math><msubsup><mi>λ</mi><mi>s</mi><mrow><mi>b</mi><mi>u</mi><mi>l</mi><mi>k</mi></mrow></msubsup></math></span>, of the new composition was also determined to be approximately zero after stress-annealing. XRD was used to identify the nanocrystalline phases in annealed ribbon, and the fracture morphologies were observed via SEM. The fracture surfaces of tough and brittle annealed ribbons contained morphologies indicative of local melting and traditional shear hackle/mist patterns, respectively, suggesting that the iron and manganese concentrations in Co-based nanocomposites influence the alloy’s mechanical properties and processability.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 116998"},"PeriodicalIF":5.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096949","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

Enhanced strain rate sensitivity due to platelet linear complexions in Al-Cu 由于血小板线性络合物在Al-Cu中的应变率敏感性增强

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-19 DOI: 10.1016/j.scriptamat.2025.117002

Pulkit Garg , Daniel S. Gianola , Timothy J. Rupert

引用次数: 0

Cryogenic amplification of the HDI effect enhances strength-ductility synergy in layered heterostructures 低温放大的HDI效应增强了层状异质结构的强度-延性协同作用

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-18 DOI: 10.1016/j.scriptamat.2025.116990

Xiaochong Lu , Hao Ran , Juchuan Fan , Si Gao , Nobuhiro Tsuji , Qingyuan Wang , Guohua Fan , Chongxiang Huang

{"title":"Cryogenic amplification of the HDI effect enhances strength-ductility synergy in layered heterostructures","authors":"Xiaochong Lu , Hao Ran , Juchuan Fan , Si Gao , Nobuhiro Tsuji , Qingyuan Wang , Guohua Fan , Chongxiang Huang","doi":"10.1016/j.scriptamat.2025.116990","DOIUrl":"10.1016/j.scriptamat.2025.116990","url":null,"abstract":"<div><div>The hetero-deformation-induced (HDI) hardening effect is crucial for overcoming the strength-ductility trade-off in heterostructured metals; however, its behavior at cryogenic temperatures remains unclear. Here, we examine the mechanical response of layered Cu/Fe samples at 293 K and 77 K, revealing a substantial enhancement in the synergy between strength and ductility at 77 K. Loading-unloading-reloading (LUR) tests indicate a stronger Bauschinger effect and a higher level of HDI stress at the cryogenic temperature. Microscopic characterizations reveal intensified strain partitioning and increased geometrically necessary dislocation (GND) accumulation near hetero-zone boundaries, which is attributed to a greater yield strength mismatch between Cu and Fe. Crystal plasticity finite element (CPFE) simulations further capture the enhanced strain partitioning, elevated GND density, and increased back stress at 77 K, consistent with experimental results. These findings demonstrate that cryogenic conditions significantly amplify the HDI effect, providing valuable insights for designing heterostructured materials suited for advanced cryogenic applications.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 116990"},"PeriodicalIF":5.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096981","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

Comprehensive identification of novel origins of single Shockley stacking faults in 4H-SiC using UV irradiation and non-destructive defect characterization 利用紫外辐照和无损缺陷表征综合鉴定4H-SiC单晶肖克利层错新成因

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-17 DOI: 10.1016/j.scriptamat.2025.116994

Chiharu Ota , Johji Nishio , Ryosuke Iijima , Kunihiro Morishima , Shunta Harada

引用次数: 0

Comments on “Practicing pseudo-binary diffusion couple method in ternary and multicomponent systems” published in Acta Materialia 294 (2025) 121127 对“在三元和多组分体系中应用伪二元扩散偶法”的评论，发表在《材料学报》294 (2025)121127

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-17 DOI: 10.1016/j.scriptamat.2025.116988

Kaustubh N. Kulkarni , Biswarupa Samantaray, Susanta K. Nayak

引用次数: 0