Scripta Materialia最新文献_第2页

Morphology evolution of R phase in a NiTiFeNb alloy: insights from in situ experiments and phase field modeling NiTiFeNb合金中R相的形态演变：来自原位实验和相场模拟的见解

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-09 DOI: 10.1016/j.scriptamat.2025.116869

Yuxuan Chen , Zhaowei Luo , Lihua Xu , Zepei Yao , Yuxuan Wang , Donghao Zhu , Yuejiao Sun , Kaiyuan Yu , Junsong Zhang , Yang Ren , Wei-Feng Rao

引用次数: 0

A unified mesoscale framework for predicting the orientation-dependent substructure evolution in FCC metals 预测FCC金属中取向相关亚结构演化的统一中尺度框架

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-09 DOI: 10.1016/j.scriptamat.2025.116871

Supriyo Chakraborty , Stephen R. Niezgoda

{"title":"A unified mesoscale framework for predicting the orientation-dependent substructure evolution in FCC metals","authors":"Supriyo Chakraborty , Stephen R. Niezgoda","doi":"10.1016/j.scriptamat.2025.116871","DOIUrl":"10.1016/j.scriptamat.2025.116871","url":null,"abstract":"<div><div>Numerous studies indicate that the type of dislocation substructure in FCC metals depends on the crystal orientation. However, a predictive model is still lacking in the literature. This work aims to establish a mesoscale modeling framework capable of predicting the orientation-dependent substructure in polycrystalline aluminum. A physics-based crystal plasticity (CP) model was employed for this purpose. Based on the CP simulation results, we formulate various descriptor functions that could potentially characterize the type of dislocation substructure. The function that accounts for both slip activity and cross-slip-based dynamic recovery effectively captures the orientation-dependent substructure evolution under tension and plane strain compression. Furthermore, it demonstrates the ability to predict intragranular heterogeneity and the effect of deformation temperature on the substructure evolution. Therefore, the CP model in conjunction with the descriptor function constitutes a mesoscale framework that can enhance the prediction of substructure morphology and optimize material properties sensitive to these substructures.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116871"},"PeriodicalIF":5.3,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581426","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

Boosting thermoelectric performance of Ga doped GeSb2Te4 single crystals by impurity level and defect engineering 通过杂质水平和缺陷工程提高Ga掺杂GeSb2Te4单晶的热电性能

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-09 DOI: 10.1016/j.scriptamat.2025.116866

Peng Chen , Denghang Li , Hong Wu , Xiangnan Gong , Guowei Wang , Guangqian Ding , Jun Liu , Dengfeng Li , Yanci Yan , Xiaoyuan Zhou , Guoyu Wang

{"title":"Boosting thermoelectric performance of Ga doped GeSb2Te4 single crystals by impurity level and defect engineering","authors":"Peng Chen , Denghang Li , Hong Wu , Xiangnan Gong , Guowei Wang , Guangqian Ding , Jun Liu , Dengfeng Li , Yanci Yan , Xiaoyuan Zhou , Guoyu Wang","doi":"10.1016/j.scriptamat.2025.116866","DOIUrl":"10.1016/j.scriptamat.2025.116866","url":null,"abstract":"<div><div>The GeSb<sub>2</sub>Te<sub>4</sub> compound, with a layered structure, shows potential for mid-temperature thermoelectric applications. In this study, we successfully synthesized Ga-doped GeSb<sub>2</sub>Te<sub>4</sub> single crystals using the Bridgman method, resulting in a significant enhancement in thermoelectric performance. Ga doping at Ge sites optimized carrier concentration and introduced impurity levels in the bandgap, as confirmed by first-principles calculations, significantly enhancing the Seebeck coefficient of GeSb<sub>2</sub>Te<sub>4</sub>. Additionally, the introduction of the Ga element brought about point defects in the lattice, which strengthen phonon scattering. Due to the reduced thermal conductivity and increased power factor, the Ge<sub>0.93</sub>Ga<sub>0.07</sub>Sb<sub>2</sub>Te<sub>4</sub> single-crystal sample achieved a peak <em>zT</em> of ∼0.87 at 773 K and an average <em>zT</em> of ∼0.6 over 323‒773 K, representing improvements of ∼34 % and ∼58 %, respectively, compared to the pristine GeSb<sub>2</sub>Te<sub>4</sub> crystal. This research provides a new strategy for optimizing the thermoelectric performance of other layered compounds.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116866"},"PeriodicalIF":5.3,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581427","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

Hydroxylation-driven surface reconstruction at the origin of compressive-to-tensile stress transition in MgO nanoparticles 氢化驱动的MgO纳米颗粒压缩-拉伸应力转变起源处的表面重建

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-08 DOI: 10.1016/j.scriptamat.2025.116841

Yang Hu , Vladyslav Turlo

引用次数: 0

Amorphization and its impact on nano-mechanical properties in martensitic Ti50Ni50 alloy 马氏体Ti50Ni50合金非晶化及其对纳米力学性能的影响

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-08 DOI: 10.1016/j.scriptamat.2025.116868

Qianyong Zhu , Yan Chong , Ran Li , Shiteng Zhao

{"title":"Amorphization and its impact on nano-mechanical properties in martensitic Ti50Ni50 alloy","authors":"Qianyong Zhu , Yan Chong , Ran Li , Shiteng Zhao","doi":"10.1016/j.scriptamat.2025.116868","DOIUrl":"10.1016/j.scriptamat.2025.116868","url":null,"abstract":"<div><div>Deformation-induced amorphization (DIA) plays a crucial role in tailoring the mechanical and functional properties of TiNi shape memory alloys. However, the formation condition of amorphization under local shear deformation remain unclear. Here, we employ high-throughput nanoindentation to investigate the critical condition of DIA in a martensitic TiNi alloy and its impact on nanoscale mechanical properties. As indentation depth reaches 400 nm (equivalent strain 1.644), a distinct amorphous phase nucleates beneath the indenter. High-pressure torsion (HPT) experiments further reveal increased amorphous volume fraction with shear strain. The resulting DIA-TiNi alloy achieves a 90 % hardness gain over its as-cast crystalline counterpart and exhibits dramatically lower strain-rate sensitivity. Cooperative shear model analysis discloses an exceptional shear transformation zone volume (STZ) of 25.82 nm³, significantly surpassing that of melt-quenched metallic glasses. This cross-scale investigation defines the critical strain threshold and strain–amorphization relationship, guiding the design of amorphous–nanocrystalline TiNi alloys with enhanced stability and performance.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116868"},"PeriodicalIF":5.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581423","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

The high dependence of non-Schmid tension twinning behavior on intergranular misorientation in magnesium under hard-orientation loading 硬取向载荷下镁的非施密德张力孪晶行为与晶间取向错误高度相关

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-07 DOI: 10.1016/j.scriptamat.2025.116865

Tianjiao Li , Qiyang He , Shuaishuai Liu , Wenhuan Chen , Liuyong He , Jinru Luo , Dongdi Yin , Jiang Zheng , Bin Jiang , Fusheng Pan , Manoj Gupta

引用次数: 0

Effect of Zn and Al alloying on slip system activation and strengthening mechanisms in magnesium alloys Zn和Al合金化对镁合金滑移体系激活及强化机制的影响

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-05 DOI: 10.1016/j.scriptamat.2025.116862

Gaoming Zhu , Young Min Kim , Ulrich Lienert , Dietmar Letzig , Sangbong Yi

引用次数: 0

Effects of dislocation network on radiation damage in iron investigated by molecular dynamics method 用分子动力学方法研究了位错网络对铁辐射损伤的影响

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-05 DOI: 10.1016/j.scriptamat.2025.116863

Wenhua Li , Wahyu Setyawan , Fei Gao , Xuelin Wang , Ning Gao

引用次数: 0

Interfacial segregation of carbon atoms: the competition between grain boundaries and phase boundaries 碳原子的界面偏析：晶界与相界的竞争

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-05 DOI: 10.1016/j.scriptamat.2025.116842

Faisal Waqar Syed , Ujjal Saikia , Binhan Sun , Srikakulapu Kiranbabu , Ali Tehranchi , Tilmann Hickel , Stefan Zaefferer , Dirk Ponge

{"title":"Interfacial segregation of carbon atoms: the competition between grain boundaries and phase boundaries","authors":"Faisal Waqar Syed , Ujjal Saikia , Binhan Sun , Srikakulapu Kiranbabu , Ali Tehranchi , Tilmann Hickel , Stefan Zaefferer , Dirk Ponge","doi":"10.1016/j.scriptamat.2025.116842","DOIUrl":"10.1016/j.scriptamat.2025.116842","url":null,"abstract":"<div><div>The microstructure of a two-phase medium manganese steel is decorated by interfaces whose character is defined by crystallography and the misorientation between adjacent grains, which in turn influences elemental segregation and shapes the resulting decorations. This study investigates how adjacent grain and phase boundaries impact a boundary’s segregation behavior, with a focus on the competition for carbon (C) enrichment in a laminated ferrite (α)- austenite (γ) microstructure subjected to a series of heat treatments. It was found that semi-coherent α-γ Kurdjumov-Sachs (KS) phase boundaries show less carbon segregation than general γ grain boundaries. Furthermore, when a γ grain boundary is present at a junction with the phase boundaries, it acts as an extracting agent for C. DFT calculations support these observations, demonstrating that carbon segregation is energetically more favorable at the γ grain boundary compared to the α/γ phase boundary, due to the more negative segregation energy at the former.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116842"},"PeriodicalIF":5.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563977","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

Fabrication of high-strength and ductile titanium matrix composites reinforced with intragranular bimodal micro/nano TiC particles by using Al4C3 as carbon source 以Al4C3为碳源制备晶内双峰微纳TiC增强高强延展性钛基复合材料

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-07-05 DOI: 10.1016/j.scriptamat.2025.116856

Jinglun Yang, Biao Chen, Kaiyue Liu, Mingju Chen, Bingbing Cai, Jinshan Li

{"title":"Fabrication of high-strength and ductile titanium matrix composites reinforced with intragranular bimodal micro/nano TiC particles by using Al4C3 as carbon source","authors":"Jinglun Yang, Biao Chen, Kaiyue Liu, Mingju Chen, Bingbing Cai, Jinshan Li","doi":"10.1016/j.scriptamat.2025.116856","DOIUrl":"10.1016/j.scriptamat.2025.116856","url":null,"abstract":"<div><div>Carbonaceous substances are commonly used to fabricate in-situ-TiC-reinforced titanium matrix composites (TMCs). However, those TiC tend to locate at/near primary powder boundaries, causing coarsening, agglomeration, and limited mechanical properties. Here, by using Al<sub>4</sub>C<sub>3</sub> particles as carbon source, TMCs reinforced with fine TiC dispersed within the matrix grains were fabricated via powder metallurgy, which exhibit both high strength and excellent ductility. Results showed that, in TiC/Ti(Al<sub>4</sub>C<sub>3</sub>) (using Al<sub>4</sub>C<sub>3</sub> as precursor), TiC particles with bimodal sizes of several micrometers and tens of nanometers were in situ formed inside matrix grains, resulting in a homogeneous distribution of fine TiC. Consequently, the hot-extruded TiC/Ti(Al<sub>4</sub>C<sub>3</sub>) exhibits remarkable advantages in strength and ductility, with increases of 52 % and 41 % over the conventional TiC/Ti(C) (using carbon black as precursor), and 57 % and 12 % over the TiC/Ti(ex-situ) (using ex-situ TiC particles), respectively. This study provides a new strategy to optimize the microstructure and mechanical properties of TMCs.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116856"},"PeriodicalIF":5.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563976","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