Journal of Materials Science & Technology最新文献_第8页

Multidimensional micro-nano heterostructures composed of nanofibers and micro dodecahedrons for electromagnetic wave attenuation and energy conversion

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-24 DOI: 10.1016/j.jmst.2025.01.002

Zhan-Zhan Wang, Qi Zheng, Mei-Jie Yu, Mao-Sheng Cao

{"title":"Multidimensional micro-nano heterostructures composed of nanofibers and micro dodecahedrons for electromagnetic wave attenuation and energy conversion","authors":"Zhan-Zhan Wang, Qi Zheng, Mei-Jie Yu, Mao-Sheng Cao","doi":"10.1016/j.jmst.2025.01.002","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.002","url":null,"abstract":"As electromagnetic (EM) pollution intensifies, EM protection materials have garnered significant attention. However, the development of lightweight and efficient EM protection materials still faces numerous challenges. In this work, a bilayered metal-organic framework (MOF), specifically zeolitic imidazolate framework-8@zeolitic imidazolate framework-67 (ZIF-8@ZIF-67), is initially prepared. Subsequently, through a combination of electrospinning and high-temperature carbonization processes, a heterodimensional structure featuring carbon-based dodecahedrons tandemly arranged on carbon nanofibers was obtained. The carbonization at various temperatures modulated the nanofibers’ conductive network and graphitization of dodecahedrons, thereby regulating the dielectric response, which is crucial for tuning the EM properties of the material. Furthermore, dielectric-magnetic synergy also plays a certain role in optimizing microwave absorption performance. The Co-CHD@CNF800 with 60 wt% loading content demonstrates a minimum reflection loss (RL) of −53.6 dB at 1.83 mm, while 40 wt% loading content exhibits a maximum effective absorption bandwidth (EAB) of 6 GHz at 2.67 mm. Additionally, Co-CHD@CNF1000 with 80 wt% exhibits remarkable electromagnetic interference (EMI) shielding performance. Importantly, an EM energy conversion device has been constructed that can effectively recover and utilize harmful EM energy. This research presents an innovative approach to the development of lightweight and efficient EM protection materials and devices.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"14 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Crevice–galvanic coupling corrosion behavior and mechanism of QC-10 aluminum alloy in chloride-containing solutions

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-24 DOI: 10.1016/j.jmst.2024.12.028

Kunpeng Deng, Guoqun Zhao, Jiachang Wang

{"title":"Crevice–galvanic coupling corrosion behavior and mechanism of QC-10 aluminum alloy in chloride-containing solutions","authors":"Kunpeng Deng, Guoqun Zhao, Jiachang Wang","doi":"10.1016/j.jmst.2024.12.028","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.028","url":null,"abstract":"The aluminum alloy–steel hybrid structures offer numerous advantages, including lightweight and flexibility. However, the contact between aluminum alloy and steel is prone to cause serious local corrosion. To further reveal the corrosion mechanism at the contact region of aluminum alloy/steel, this paper investigates the crevice corrosion of QC-10 aluminum alloy and the crevice–galvanic coupling corrosion of QC-10 aluminum alloy/S50C steel, explores the synergistic effect of different crevice height, pH and Cl− concentration on the corrosion behavior of QC-10 aluminum alloy by electrochemical experiments, immersion corrosion experiments and microscopic morphology characterization. The results demonstrate that the crevice corrosion of aluminum alloy decreases with the increase of crevice height, and there exists a critical crevice height for the occurrence of crevice corrosion. In the aluminum alloy–steel hybrid structure, the galvanic effect accelerates the crevice corrosion of aluminum alloy, and the corrosion products of steel embedded in the aluminum alloy oxide film decrease the corrosion resistance of the aluminum alloy. Additionally, the corrosion products of steel alter the crevice solution compositions, while intensifying the crevice corrosion of aluminum alloy. It is concluded that reasonable control of the crevice height and the inhibition of the corrosion of steel are effective methods to improve the corrosion resistance of aluminum alloy–steel hybrid structures.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"34 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Influence of in-situ precipitation on corrosion behaviors of wire arc directed energy deposited Al-Mg(-Sc-Zr)

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-24 DOI: 10.1016/j.jmst.2024.12.025

Yubin Zhou, Zewu Qi, Baoqiang Cong, Yuan Zhao, Wei Guo, Zihao Jiang, Hongwei Li, Chaofang Dong, Yucheng Ji, Xing He, Haibo Wang, Sanbao Lin, Xiaoyu Cai, Bojin Qi

{"title":"Influence of in-situ precipitation on corrosion behaviors of wire arc directed energy deposited Al-Mg(-Sc-Zr)","authors":"Yubin Zhou, Zewu Qi, Baoqiang Cong, Yuan Zhao, Wei Guo, Zihao Jiang, Hongwei Li, Chaofang Dong, Yucheng Ji, Xing He, Haibo Wang, Sanbao Lin, Xiaoyu Cai, Bojin Qi","doi":"10.1016/j.jmst.2024.12.025","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.025","url":null,"abstract":"The influence of in-situ precipitation on corrosion behaviors of wire arc directed energy deposited (WADED) Al-Mg-(Sc-Zr) was studied. WADED Al-Mg showed a homogeneous microstructure with coarse equiaxed grains. WADED Al-Mg-Sc-Zr exhibited fine equiaxed grains along the molten pool boundary (MPB) and inter-layer zone (ITZ) while coarse equiaxed grains were inside the molten pool. The in-situ precipitation resulted in the primary Al3(Sc, Zr) aggregated along MPB and ITZ while minor-sized secondary Al3(Sc, Zr) existed inside the molten pool. WADED Al-Mg-Sc-Zr showed improved electrochemical behavior than Al-Mg. WADED Al-Mg presented random pittings that occurred near dispersed β-Al3Mg2. WADED Al-Mg-Sc-Zr exhibited pittings along MPB and ITZ, where Al3(Sc, Zr) aggregated and induced galvanic corrosion. Corrosion anisotropy was obvious in Al-Mg-Sc-Zr since more MPBs and ITZs make the XOZ plane susceptive to localized corrosion.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Confining CuNi alloy nanoparticles into mesoporous silicon carbide nanofibers for enhanced tandem catalytic functionality

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-24 DOI: 10.1016/j.jmst.2024.11.076

Beibei Gao, Yi Zhou, Yuan Fang, Richeng Jin, Yuchi Fan, Lianjun Wang, Wan Jiang, Pengpeng Qiu, Wei Luo

{"title":"Confining CuNi alloy nanoparticles into mesoporous silicon carbide nanofibers for enhanced tandem catalytic functionality","authors":"Beibei Gao, Yi Zhou, Yuan Fang, Richeng Jin, Yuchi Fan, Lianjun Wang, Wan Jiang, Pengpeng Qiu, Wei Luo","doi":"10.1016/j.jmst.2024.11.076","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.076","url":null,"abstract":"Mesoporous framework supported metal nanoparticle catalyst represents a promising material platform for creating multiple active sites that drive tandem reactions. In this study, we demonstrate a novel catalyst design that involves the encapsulation of CuNi alloy nanoparticles within mesoporous silicon carbide nanofibers (mSiCf) to achieve efficient tandem conversion of furfural (FFA) into 2-(isopropoxymethyl)furan (IPF). The unique one-dimensional (1D) mesoporous structure of mSiCf, coupled with abundant oxygen-containing groups, offers a favorable surface microenvironment for the stabilization of bimetallic CuNi active sites. Through carefully optimizing metal to acid sites, we have developed a catalyst containing a total mass ratio of 20% Cu and Ni, which exhibits a remarkable performance with complete FFA conversion and 92% IPF selectivity in 4 h. In-depth mechanistic investigations have revealed that the superior activity of this catalyst is attributed to a tandem reaction mechanism. Initially, FFA is hydrogenated at the dual metal active sites to produce furfuryl alcohol (FOL) as an intermediate, which is subsequently etherified at the acid sites with suitable species and strengths on the mSiCf supports. Additionally, the robust 1D mSiCf framework effectively protects the metal sites from agglomeration, resulting in excellent reusability of the catalyst. This study underscores the potential of mesoporous silicon carbide-supported bimetallic active sites for achieving enhanced tandem catalytic functionality.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"17 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Thermosensitive, tough and size-adjustable elastomer with multi-hydrogen bond based on supramolecular interactions

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-24 DOI: 10.1016/j.jmst.2024.11.077

Chaoxian Chen, Siwen Chen, Zhipeng Hou, Kai Zhang, Yanyan Lv, Jianshe Hu, Siyu Sun, Liqun Yang, Jing Chen

{"title":"Thermosensitive, tough and size-adjustable elastomer with multi-hydrogen bond based on supramolecular interactions","authors":"Chaoxian Chen, Siwen Chen, Zhipeng Hou, Kai Zhang, Yanyan Lv, Jianshe Hu, Siyu Sun, Liqun Yang, Jing Chen","doi":"10.1016/j.jmst.2024.11.077","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.077","url":null,"abstract":"Medical stents have made significant strides in development, however, creating a single manufacturing material that combines size adjustability, robust strength, and degradability remains a major challenge. Here, we developed an elastomer designed for stent fabrication, featuring excellent thermo-responsive shape memory and fast self-healing. This elastomer is produced through supramolecular interactions between liquid crystal moieties, which exhibit strong orientation, and a polymer backbone. These supramolecular interactions provide the elastomer with remarkable mechanical strength (10.46 MPa). Interestingly, the elastomer shows excellent mesocrystalline stability and cyclability, thanks to multiple non-covalent bonds, allowing the crosslinked liquid crystalline phase to maintain integrity at temperatures up to 285°C. Impressively, the elastomer can respond to stress and temperature changes, fully reverting to its original shape in just 25.7±0.94 s. When configured as a helical stent, its macroscopic dimensions can be adjusted to mimic the size of blood vessels in vitro. The stent exhibits rapid responsiveness at 37°C, achieving complete self-expansion within 10 s. Furthermore, it demonstrates excellent degradability, with a weight loss of only 2.75% ± 0.31% after 70 d. This innovation paves the way for new possibilities in the use of medical stents, particularly for the long-term treatment of coronary heart disease.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Sulphur anion induced electronic structure regulation of RuO2 nanodots for efficient electrocatalytic overall water splitting

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-24 DOI: 10.1016/j.jmst.2024.11.074

Xi-Zheng Fan, Jing-Peng Hu, Xin Du, Zhong-Yi Liu, Xin-Zheng Yue

{"title":"Sulphur anion induced electronic structure regulation of RuO2 nanodots for efficient electrocatalytic overall water splitting","authors":"Xi-Zheng Fan, Jing-Peng Hu, Xin Du, Zhong-Yi Liu, Xin-Zheng Yue","doi":"10.1016/j.jmst.2024.11.074","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.074","url":null,"abstract":"Developing bifunctional electrocatalysts with enhanced efficiency for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) remains a significant challenge. Herein, we constructed S-doped ultra-fine RuO2 nanodots that were uniformly dispersed on carbon nanotubes. The incorporation of S effectively induces local rearrangement of the electronic structure of RuO2, thereby enhancing the dispersion of RuO2 as active sites and optimizing the adsorption free energy of H* intermediate. As expected, the as-synthesized S-RuO2/CNT delivers remarkable HER activity in all pH electrolytes, achieving lower overpotentials of 136, 159, and 396 mV at 100 mA cm−2 in acidic, neutral, and basic solutions, respectively. Moreover, a unitary S-RuO2/CNT electrolytic cell requires only a lower voltage (1.476 V) to achieve a current density of 10 mA cm−2 in 1.0 mol/L KOH. This ingenious work represents a significant breakthrough in the rational design of bifunctional electrocatalysts, enabling remarkable performance in electrochemical water electrolysis.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"34 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Enhancing high-temperature properties in laser powder bed fusion of Cu-Cr-Zr alloy via heat-stable dislocations and dual-nanoprecipitates

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-24 DOI: 10.1016/j.jmst.2024.12.031

Wenjun Ma, Yanfang Wang, Siying Wang, Lei Gao, Fei Cao, Yihui Jiang, Shuhua Liang

{"title":"Enhancing high-temperature properties in laser powder bed fusion of Cu-Cr-Zr alloy via heat-stable dislocations and dual-nanoprecipitates","authors":"Wenjun Ma, Yanfang Wang, Siying Wang, Lei Gao, Fei Cao, Yihui Jiang, Shuhua Liang","doi":"10.1016/j.jmst.2024.12.031","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.031","url":null,"abstract":"Commercial wrought high-strength Cu-Cr-Zr alloys face limited high-temperature properties due to the rapid coarsening or dissolution of Cr precipitates. Here, we report a laser powder bed fusion (LPBF) fabricated Cu-0.84Cr-0.42Zr (wt.%) alloy with exceptional heat resistance after aging. Primary Cr@Cu5Zr phase (∼39.8 nm) with core-shell structure and a high density of heat-stable dislocations were introduced from the rapid solidification of LPBF and enabled the alloy to gain significant improvement in high-temperature properties. After aging treatment, secondary Cr and Cu51Zr14 phases (∼3.4 nm) were precipitated, in which Zr solute was segregated at one side of the Cr phase, enhancing the thermal stability of Cr phase. The excellent combinations of strength and thermal conductivity were achieved at or above 400°C. Particularly at 600°C, the aged sample not only exhibited a high tensile strength of ∼196 MPa, which significantly surpassed that of wrought Cu-Cr-Zr alloys, but also possessed a thermal conductivity of ∼349 W/(m K) comparable to that of pure copper.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"62 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

High-entropy lead-free relaxors for large capacitive energy storage with superior comprehensive performance 综合性能优越的大容量储能高熵无铅弛豫器

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-23 DOI: 10.1016/j.jmst.2024.11.073

Jianhong Duan, Kun Wei, He Qi, Huifen Yu, Hao Li

{"title":"High-entropy lead-free relaxors for large capacitive energy storage with superior comprehensive performance","authors":"Jianhong Duan, Kun Wei, He Qi, Huifen Yu, Hao Li","doi":"10.1016/j.jmst.2024.11.073","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.073","url":null,"abstract":"Dielectric ceramics with ultrahigh power density and ultrafast charge/discharge rates are crucial components of advanced dielectric capacitors. However, enhancing their comprehensive performance remains a major challenge for cutting-edge applications. Here, a high-entropy strategy is proposed to construct multiple local distortions, including various types of oxygen octahedral tilts, highly dynamic polar nanoregions, and lattice distortions. This approach effectively delays polarization saturation, reduces energy loss, and, in conjunction with the ultrafine grains induced by the high-entropy effect, enhances mechanical properties and breakdown field. Therefore, a remarkable recoverable energy density of 9.1 J cm−3, a high conversion efficiency of 82.7%, and a large Vickers hardness of 8.77 GPa are simultaneously achieved in 0.73Bi0.47Na0.47Ba0.06TiO3–0.27Ca0.7La0.2Zr0.15Ti0.85O3 lead-free high-entropy relaxors. Additionally, superior frequency and temperature stability, as well as excellent charge/discharge performance, are also obtained. These findings demonstrate that the high-entropy strategy is a promising method for designing high-performance dielectric ceramics.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"4 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143020881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Electronic coupling effect optimized FeOOH nanosheets to enable high-performance Ni-Fe battery 优化FeOOH纳米片的电子耦合效应，实现高性能镍铁电池

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-23 DOI: 10.1016/j.jmst.2024.11.075

Fan Yang, Ruiwang Zhang, Xunwei Ji, Shiwei Lin, Xihong Lu

{"title":"Electronic coupling effect optimized FeOOH nanosheets to enable high-performance Ni-Fe battery","authors":"Fan Yang, Ruiwang Zhang, Xunwei Ji, Shiwei Lin, Xihong Lu","doi":"10.1016/j.jmst.2024.11.075","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.075","url":null,"abstract":"Aqueous rechargeable Ni-Fe batteries exhibit unique advantages in large-scale energy storage thanks to their affordability, safety, and reliability. However, their limited energy density and Coulombic efficiency stem from unfavorable OH− adsorption capability and low electrochemical activity of Fe sites, result in electrode kinetic delays for Fe anodes. Here, we report Mn and S co-modified FeOOH (MSFF) nanosheets as an advanced anode in Ni-Fe batteries, synthesized from a facile one-step surface-redox-etching method at room temperature. Based on the strong electronic coupling effect between Mn and S atoms, such MSFF anode presents fast electron transport capability, enhanced OH−-adsorption capability, and redox reactivity. Specifically, the MSFF anode can achieve a high areal capacity of 2 mAh cm−2 at 10 mA cm−2, which retains a staggering 96% of the initial capacity after undergoing 9000 cycles at a higher current density of 30 mA cm−2. In addition, the assembled Ni-Fe battery can provide a capacity of 0.85 mAh cm−2 at 16 mA cm−2, significantly outperforming most recently reported aqueous rechargeable batteries. This work may offer an innovative and feasible approach for modulating the local electronic structure of high-performance Ni-Fe battery electrode materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"32 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143020886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Fracture toughness of titanium alloys fabricated by high-power laser-directed energy deposition: Fractal analysis and prediction model 大功率激光定向能沉积钛合金断裂韧性的分形分析与预测模型

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-22 DOI: 10.1016/j.jmst.2024.12.027

Yongming Ren, Yuanshuai Cao, Yongqin Liu, Ziqi Jie, Zengyun Jian, Man Zhu, Shixing Huang, Meng Wang, Yinghui Zhou, Xin Lin, Weidong Huang

{"title":"Fracture toughness of titanium alloys fabricated by high-power laser-directed energy deposition: Fractal analysis and prediction model","authors":"Yongming Ren, Yuanshuai Cao, Yongqin Liu, Ziqi Jie, Zengyun Jian, Man Zhu, Shixing Huang, Meng Wang, Yinghui Zhou, Xin Lin, Weidong Huang","doi":"10.1016/j.jmst.2024.12.027","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.027","url":null,"abstract":"Laser additive-manufactured (AM) metallic components typically have superior uniaxial tensile strength to their conventional processing counterparts. However, the strength and toughness trade-off for most AM-fabricated metallic parts remains unsolved. Generally, the heat treatment processes can enhance the elongation and toughness of as-deposited AM samples. In this work, the fracture toughness of high-power (7600 W) laser directed energy deposition Ti–6Al–4V (Ti64) + heat treatment (short as Ti64 DED-HT) samples, were studied using fracture property tests. Combining electron backscatter diffraction (EBSD), confocal laser scanning microscope, and fractal geometry theory, we investigated their fracture mechanism and proposed a new prediction model between plane-strain fracture toughness (KIc) and conventional tensile properties. The results show that the plane-strain fracture toughness value in four states (two scanning speeds and two directions) is 81.3±0.7 MPa m1/2, higher than that of the wrought counterparts (∼65 MPa m1/2). This high plane-strain fracture toughness results from the combination of relatively fine columnar β grains and coarse α laths of the deposited parts after a specific heat-treated process. Combined with a confocal laser scanning microscope and fractal geometry analysis theory, we found that the rough surface profile leads to high fractal dimension values. In addition, we proposed a modified analytical prediction model, which can effectively predict the plane-strain fracture toughness value of AM Ti64 titanium alloys. These findings provide a guideline for obtaining a high strength–toughness and reliably predicting its KIc value in AM titanium alloys.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"22 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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