Scripta Materialia最新文献_第2页

Cooperative and competitive interactions on plastic deformation dynamics in gradient grained dual-phase heterostructures 梯度晶状双相异质结构塑性变形动力学的合作与竞争相互作用

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-17 DOI: 10.1016/j.scriptamat.2025.116821

Renhao Wu , Fujun Cao , Haiming Zhang , Longfei Xu , Hyojin Park , Shi Woo Lee , Peihao Geng , Xiaomei Feng , Ninshu Ma , Hyoung Seop Kim

{"title":"Cooperative and competitive interactions on plastic deformation dynamics in gradient grained dual-phase heterostructures","authors":"Renhao Wu , Fujun Cao , Haiming Zhang , Longfei Xu , Hyojin Park , Shi Woo Lee , Peihao Geng , Xiaomei Feng , Ninshu Ma , Hyoung Seop Kim","doi":"10.1016/j.scriptamat.2025.116821","DOIUrl":"10.1016/j.scriptamat.2025.116821","url":null,"abstract":"<div><div>Heterostructured metallic materials hold significant potential for overcoming traditional strength-ductility trade-off, primarily due to their unique hetero-deformation-induced strengthening effects. This study investigates the interplay between competitive and cooperative interactions in strengthening and hardening mechanisms of stainless steel with dual heterogeneity in phase and grain size gradient. Micro-digital image correlation and <em>in-situ</em> electron backscatter diffraction were employed to monitor the evolution of microstructures during deformation, including grain size, phase, and recrystallization state. Additionally, nonlocal spectral crystal plasticity simulations were conducted to quantitatively analyze localized stress-strain and geometrically necessary dislocations distribution. The individual heterogeneity of the grain size gradient plays a cooperative role at the early deformation stage but assumes a competitive role during the intermediate deformation stage, in conjunction with the phase heterogeneity. The dual factors collaboratively dominate the hetero-deformation-induced effect of the integrated sample. This study provides valuable insights into the design of advanced dual/multiple heterostructures.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116821"},"PeriodicalIF":5.3,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297981","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

Abnormal grain growth mechanisms in wrought nickel–based superalloy via semi–in situ EBSD: New perspectives 半原位EBSD形变镍基高温合金异常晶粒生长机制：新视角

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-17 DOI: 10.1016/j.scriptamat.2025.116829

Shichang Qiao , Chao Yuan , Zhiwen Hou , Tianyi Wang , Na Li , Xinyu Gao , Xin Wen , Fengzhen Wang , Zhikang Xia , Yongqiang Wang , Jinzhe Jiang , Shuai Liu

引用次数: 0

Superior strength-ductility synergy achieved in WA-DED Mg alloys by modulating precipitates through double-stage aging 通过双阶段时效调制析出物，WA-DED镁合金获得了优异的强度-延性协同效应

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-14 DOI: 10.1016/j.scriptamat.2025.116819

Wei Liu , Hai-Long Jia , Min Zha , Artem Marchenkov , Xiao-Feng Xu , Yue Jiang , Yi-Hang Yang , Hui-Yuan Wang

{"title":"Superior strength-ductility synergy achieved in WA-DED Mg alloys by modulating precipitates through double-stage aging","authors":"Wei Liu , Hai-Long Jia , Min Zha , Artem Marchenkov , Xiao-Feng Xu , Yue Jiang , Yi-Hang Yang , Hui-Yuan Wang","doi":"10.1016/j.scriptamat.2025.116819","DOIUrl":"10.1016/j.scriptamat.2025.116819","url":null,"abstract":"<div><div>Wire arc directed energy deposition (WA-DED) offers significant potential for rapid fabrication of large-scale Mg alloy components, yet its use is hindered by limited wire availability and strength-ductility trade-offs. Here, we present a groundbreaking advancement in WA-DED Mg-Zn-Zr alloys. Through a novel double-stage aging strategy, an exceptional strength-ductility synergy has been achieved, with the peak-aged alloy demonstrating a yield strength (YS) of ∼214 MPa, an ultimate tensile strength (UTS) of ∼341.8 MPa and an elongation (EL) of ∼21.8 %. Notably, the UTS rivals that of WA-DED Mg-rare earth alloys, while exhibiting excellent EL. The excellent properties are caused by the formation of finer and denser <span><math><msubsup><mi>β</mi><mn>1</mn><mo>′</mo></msubsup></math></span> precipitates during aging. These coherent precipitates play a dual role: they provide significant strengthening by impeding dislocation motion, while their shearable nature prevents stress concentration and preserves ductility. This study offers a novel pathway for developing WA-DED Mg alloys with high strength and ductility.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116819"},"PeriodicalIF":5.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280994","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

Distinct mechanism governing selective leaching of elements from ferrite and austenite in 600 °C lead-bismuth eutectic 600℃铅铋共晶中铁素体和奥氏体元素选择性浸出的独特机制

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-14 DOI: 10.1016/j.scriptamat.2025.116818

Decang Zhang , Xiaoxin Zhang , Xian Zeng , Chenxi Zhu , Fanao Meng , Qingzhi Yan

引用次数: 0

Segregation at defective twin boundaries enables high strength and ductility in a nano-twinned Ni alloy 在缺陷孪晶边界处的偏析使纳米孪晶镍合金具有较高的强度和延展性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-14 DOI: 10.1016/j.scriptamat.2025.116822

Xinlai An , Shengyun Yuan , Bohou Zhang , Jiajia Shen , Jieying Chen , Tian Feng , J.P. Oliveira , Yong Zhang

{"title":"Segregation at defective twin boundaries enables high strength and ductility in a nano-twinned Ni alloy","authors":"Xinlai An , Shengyun Yuan , Bohou Zhang , Jiajia Shen , Jieying Chen , Tian Feng , J.P. Oliveira , Yong Zhang","doi":"10.1016/j.scriptamat.2025.116822","DOIUrl":"10.1016/j.scriptamat.2025.116822","url":null,"abstract":"<div><div>The nano-twin boundary (NTB) is not perfectly flat, but inherently decorated with certain amounts of steps comprising partial dislocations. With the decreasing of twin spacing, material softening may be induced by the premature gliding of partial dislocations along NTBs. In the present work, the nano-twinned Ni alloy with Cr enrichment at the steps on the NTBs was fabricated via rolling and subsequent annealing treatments. It was found that Cr enrichment could stabilize NTBs for enhancing the strength and uniform elongation simultaneously. The enhanced strength could be ascribed to a ∼86 MPa increment on the critical resolved shear stress of dislocations gliding along NTBs, which was determined by a combination of miniature tensile testing and electron backscattered diffraction analyses. Furthermore, with plastic straining, Cr enrichment could act as obstacles for dislocation motion, thereby facilitating dislocations accumulation at the NTs, which is indispensable for improving the material tensile ductility.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116822"},"PeriodicalIF":5.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280995","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

Retrokinetics of crystallization 结晶反动力学

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-11 DOI: 10.1016/j.scriptamat.2025.116799

Luke Hunter , Ryo Torii , Gaetano Burriesci , Sergio Bertazzo

引用次数: 0

Thermo-electrical analysis of joule heating effects at grain boundaries during field-assisted sintering of yttria-doped ceria 场助烧结掺钇铈晶界焦耳热效应的热电分析

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-10 DOI: 10.1016/j.scriptamat.2025.116814

Junyoung Chae , Robert Mücke , Payam Kaghazchi , Olivier Guillon , Heung Nam Han

{"title":"Thermo-electrical analysis of joule heating effects at grain boundaries during field-assisted sintering of yttria-doped ceria","authors":"Junyoung Chae , Robert Mücke , Payam Kaghazchi , Olivier Guillon , Heung Nam Han","doi":"10.1016/j.scriptamat.2025.116814","DOIUrl":"10.1016/j.scriptamat.2025.116814","url":null,"abstract":"<div><div>This study investigates the role of local microscopic Joule heating at grain boundaries in the enhanced sintering behaviour of ceria under moderate electric fields. While fields as low as 10 V/cm are known to significantly accelerate sintering, the underlying mechanism remains unclear. Three potential factors have been proposed: macroscopic Joule heating (previously ruled out), local Joule heating at grain boundaries, and direct field-induced modifications of grain boundary structures enhancing diffusion. Focusing on the second hypothesis, thermo-electrical finite element (FE) simulations were conducted for a realistic microstructure of 10 mol% yttria-doped ceria (YDC) at 1208 °C under a field strength of 14 V/cm, incorporating appropriate grain boundary properties. The simulations revealed that power dissipation at grain boundaries is minimal (∼0.1 W/mm³), resulting in negligible local temperature rises (<0.1 K). These findings exclude microscopic Joule heating as a significant contributor to the field-enhanced sintering of ceria.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116814"},"PeriodicalIF":5.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255432","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

Impacts of excess vacancies on order-domain growth in D03 Fe3Al intermetallic phase 过量空位对D03 Fe3Al金属间相有序畴生长的影响

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-09 DOI: 10.1016/j.scriptamat.2025.116812

Masayuki Okugawa , Madoka Watanabe , Satoshi Ichikawa , Kazuhisa Sato , Yuheng Liu , Hiroyuki Y. Yasuda , Yuichiro Koizumi

{"title":"Impacts of excess vacancies on order-domain growth in D03 Fe3Al intermetallic phase","authors":"Masayuki Okugawa , Madoka Watanabe , Satoshi Ichikawa , Kazuhisa Sato , Yuheng Liu , Hiroyuki Y. Yasuda , Yuichiro Koizumi","doi":"10.1016/j.scriptamat.2025.116812","DOIUrl":"10.1016/j.scriptamat.2025.116812","url":null,"abstract":"<div><div>Properties of intermetallic compounds depend on the degree of order and the size of ordered domain (i.e., antiphase domain). Phase-field simulations can predict domain growth. However, precise prediction requires understanding of the ordering mobility. Herein, we examine the impact of excess vacancies on the ordered-domain growth in D0<sub>3</sub>-Fe<sub>3</sub>Al intermetallics using <em>in-situ</em> transmission electron microscopy (TEM). It was found that ordering mobility is correlated with excess vacancies introduced via rapid quenching from the disordered state. The similarity between the dependence of ordering mobility at 773 K on the quenching temperature and the dependence of equilibrium vacancy concentration on the temperature suggests that the diffusion for migration of domain boundary is dominated by the quenched-in excess vacancies. These findings advance fundamental understanding and enable control over the ordering in intermetallic fabrication through rapid solidification processes, such as powder bed fusion-type additive manufacturing.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116812"},"PeriodicalIF":5.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239969","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 twinning mechanism: Direct observation of the transition from stacking faults to Microtwins 孪生机制：从层错到微孪生转变的直接观察

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-09 DOI: 10.1016/j.scriptamat.2025.116803

Xiaokun Li , Haopeng Zhang , Jian Jia , Jiantao Liu , Yiwen Zhang

{"title":"A twinning mechanism: Direct observation of the transition from stacking faults to Microtwins","authors":"Xiaokun Li , Haopeng Zhang , Jian Jia , Jiantao Liu , Yiwen Zhang","doi":"10.1016/j.scriptamat.2025.116803","DOIUrl":"10.1016/j.scriptamat.2025.116803","url":null,"abstract":"<div><div>The transition mechanism from stacking faults to microtwins in nickel-based superalloys remains debated despite its critical role in governing high-temperature creep behavior. Here, we directly observe the atomic-scale evolution of superlattice extrinsic stacking faults (SESFs) into microtwins during creep deformation at 815 °C/490 MPa using aberration-corrected scanning transmission electron microscopy (STEM). Transitional regions exhibit coexisting microtwin-like symmetry and residual stacking fault misalignment, confirming that sequential shearing of a/6 < 112> Shockley partial dislocations and subsequent atomic rearrangement drive SESF-to-microtwin conversion. Notably, microtwins exclusively originate within the γ′ phase, with no evidence of matrix-initiated twins. These findings experimentally validate the Kolbe atomic rearrangement mechanism while challenging hypotheses proposing matrix-driven twin formation in analogous systems. The results provide a foundational framework for understanding deformation pathways and designing creep-resistant alloys, particularly for applications demanding microstructural stability under extreme thermomechanical conditions.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116803"},"PeriodicalIF":5.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239968","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

Oxygen-induced interfacial structure selection, dopant segregation and adhesive strength of α/β interfaces in titanium alloys 钛合金中氧致界面结构选择、掺杂偏析及α/β界面的结合强度

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-06-07 DOI: 10.1016/j.scriptamat.2025.116813

Xiaofu Zhang , Shu Wang , Minghao Hua , Ruirun Chen , Weipeng Xu , Hongwei Wang

{"title":"Oxygen-induced interfacial structure selection, dopant segregation and adhesive strength of α/β interfaces in titanium alloys","authors":"Xiaofu Zhang , Shu Wang , Minghao Hua , Ruirun Chen , Weipeng Xu , Hongwei Wang","doi":"10.1016/j.scriptamat.2025.116813","DOIUrl":"10.1016/j.scriptamat.2025.116813","url":null,"abstract":"<div><div>The dopant segregation and interfacial strengthening in multi-phase engineering alloys have been extensively investigated to understand bonding behavior and enhance mechanical properties by employing density functional theory (DFT). However, the properties of interface involving dynamical/mechanical unstable structures, e.g., β-Ti at low temperatures, are still obscured. We employed DFT with tailored restrictive relaxation to comprehensively investigate the structure, segregation and strength of α/β interface in titanium alloys. The results provide a new insight to the inconsistency of α/β interface types between theoretical calculations and experimental observations, i.e., the hollow-type interface would be destroyed by inevitable oxygen impurities. Moreover, many reported segregation behaviors observations are rationalized in the case of single doping. Boron is screened as the most effective strengthening element, and origin of interface hardening is revealed by electronic structure analysis. Furthermore, we explore the promising selections of X-O co-strengthening strategy to promote environment-friendly development of titanium alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"267 ","pages":"Article 116813"},"PeriodicalIF":5.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239967","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