Materials Characterization最新文献_第9页

Normalizing temperature dependence on microstructure, mechanical and wear properties of a novel high‑vanadium high-speed steel 正火温度对一种新型高钒高速钢组织、力学性能和磨损性能的影响

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-14 DOI: 10.1016/j.matchar.2025.115047

Dingchen Wang , Xipeng Tao , Xinguang Wang , Rui Zhang , Zijian Zhou , Song Zhang , Chunhua Zhang , Xiaofeng Sun , Yizhou Zhou , Chuanyong Cui

{"title":"Normalizing temperature dependence on microstructure, mechanical and wear properties of a novel high‑vanadium high-speed steel","authors":"Dingchen Wang , Xipeng Tao , Xinguang Wang , Rui Zhang , Zijian Zhou , Song Zhang , Chunhua Zhang , Xiaofeng Sun , Yizhou Zhou , Chuanyong Cui","doi":"10.1016/j.matchar.2025.115047","DOIUrl":"10.1016/j.matchar.2025.115047","url":null,"abstract":"<div><div>This study investigates the microstructure, mechanical properties, and wear performance of a novel high‑vanadium high-speed steel (HVHSS) after normalizing at different temperatures (800 °C, 900 °C, 1000 °C, and 1100 °C) with a holding time of 2 h. All samples were air cooled to room temperature after normalizing. As the temperature increased, the martensite content increased first and then reduced whereas the carbides including VC and M<sub>7</sub>C<sub>3</sub> fined first and subsequently became coarse, contributing to the superior hardness (70HRC) and compressive strength (3067 MPa) observed normalized at 1000 °C. The reverse transformation from martensite to austenite was observed during normalizing at 1100 °C. The superior hardness and strength improved the surface deformation resistance, including enhanced work-hardening in the matrix, co-lattice interface of VC/matrix and stacking fault locks in VC, hindering dislocation slipping and material spalling, thus achieving excellent wear properties when normalized at 1000 °C. The wear mechanism changed from adhesive/abrasive to fatigue wear as the temperature increased. Moreover, TEM analysis indicated that the finer sized VC has a larger stacking fault energy and more stable phase interface, contributing to the stability of VC during wear process.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115047"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838995","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

Multi-scale fatigue crack growth behaviors within band mixed-grain structure in AlLi alloy AlLi合金带混晶组织内多尺度疲劳裂纹扩展行为

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-14 DOI: 10.1016/j.matchar.2025.115011

Zhi-min Cai , Guang-jun Zeng , Hui Xiang , Chen-chen Xiong , Han-yuan Sun , Hao-ran Li , San-xi Deng , Hua Zhou , Yong Yao , Dan-yang Liu , Jin-feng Li

{"title":"Multi-scale fatigue crack growth behaviors within band mixed-grain structure in AlLi alloy","authors":"Zhi-min Cai , Guang-jun Zeng , Hui Xiang , Chen-chen Xiong , Han-yuan Sun , Hao-ran Li , San-xi Deng , Hua Zhou , Yong Yao , Dan-yang Liu , Jin-feng Li","doi":"10.1016/j.matchar.2025.115011","DOIUrl":"10.1016/j.matchar.2025.115011","url":null,"abstract":"<div><div>The effect of band mixed-grain structure controlled by annealing treatment before solid solution on fatigue crack growth (FCG) properties in T8 aged 2A97 Al<img>Li alloy sheets was investigated systematically. The lamellar boundaries (LBs) and residual secondary phase particles inhibited the growth of recrystallized grains along normal direction. It ultimately resulted in a pronounced band mixed-grain structure. Annealing treatment significantly increased the fraction of sub-grains and the lower annealing temperature suppressed sub-grains coarsening. Fatigue cracks growing parallel to the sub-grain bands suffered great resistance leading to a significant reduction in FCG rate. At lower stress intensity factor range (ΔK), changes in stress field at the crack tip significantly diverted fatigue crack propagation direction, resulting in a millimeter-scale bending area in fatigue crack path. Moreover, the bending degree of fatigue crack is closely related with sub-grain size. Microscopic fatigue cracks grew mainly along the grain orientation boundaries (GOBs) caused by insufficient recrystallization. Its deflections and bifurcations were affected by the secondary phase particles and Schmid factor (SF). Large-sized brittle secondary phase particles tended to damage the fatigue properties of the matrix, while fine dispersoids reduced FCG rate. Bifurcations occurred when fatigue crack propagated in the R-cube orientated sub-grain regions with higher SF</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115011"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826245","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 effect of Sn and Ti addition in CoCrFeNi to prepare equiatomic high entropy alloy cladded on 304 stainless steels via gas tungsten arc cladding 在CoCrFeNi中添加Sn和Ti对304不锈钢气钨弧包覆等原子高熵合金的影响

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-14 DOI: 10.1016/j.matchar.2025.115048

Sakdipat Jaturapronperm , Pongpak Chiyasak , Ariya Taechamahaphan , Ching-An Huang , Worawat Wattanathana , Aphichart Rodchanarowan

{"title":"The effect of Sn and Ti addition in CoCrFeNi to prepare equiatomic high entropy alloy cladded on 304 stainless steels via gas tungsten arc cladding","authors":"Sakdipat Jaturapronperm , Pongpak Chiyasak , Ariya Taechamahaphan , Ching-An Huang , Worawat Wattanathana , Aphichart Rodchanarowan","doi":"10.1016/j.matchar.2025.115048","DOIUrl":"10.1016/j.matchar.2025.115048","url":null,"abstract":"<div><div>High entropy alloys (HEAs) are one of the most essential materials investigated by scientists and engineers in recent years. Among various processes, cladding process is widely used in the preparation of HEAs' coatings. In this study, the equiatomic CoCrFeNiSn and CoCrFeNiTi systems were successfully cladded on SS304 substrates using gas tungsten arc cladding. The phase structure found in the CoCrFeNiSn cladded layer was BCC (Ni<sub>2</sub>Sn<sub>2</sub>Co<sub>2</sub>) and FCC (Co<sub>0.25</sub>Cr<sub>0.25</sub> Fe<sub>0.25</sub> Ni<sub>0.25</sub>), while the phase structure found in the CoCrFeNiTi cladded layer was composed of FCC (NiTi<sub>2</sub>-Laves phase) and FCC (Co<sub>0.25</sub>Cr<sub>0.25</sub> Fe<sub>0.25</sub> Ni<sub>0.25</sub>). The formation of planar, cellular, columnar dendritic, and equiaxed dendritic structures was observed in all of the CoCrFeNiSn and CoCrFeNiTi cladded systems. In addition, the presence of Co, Cr, Ni, and Fe resulted in the formation of FCC phase for the CoCrFeNiSn and CoCrFeNiTi cladded layers. The hardness of the CoCrFeNiTi cladded layer (293.4–315.8 HV) was higher than that of the CoCrFeNiSn cladded layer (265.5–282.8 HV). Furthermore, the CoCrFeNiSn cladded layer exhibited the larger passive region in 3.5 wt% NaCl solution compared to both the CoCrFeNiTi cladded layer and SS304.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115048"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868738","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

Deformation and mechanical characteristic of FeCoNiCr alloy using in-situ compression and atomic simulation 原位压缩与原子模拟研究FeCoNiCr合金的变形与力学特性

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-14 DOI: 10.1016/j.matchar.2025.115024

Yu-Sheng Lu , Jia-Yuan Chen , Thi-Xuyen Bui , Ming-Hong Lin , Te-Hua Fang

{"title":"Deformation and mechanical characteristic of FeCoNiCr alloy using in-situ compression and atomic simulation","authors":"Yu-Sheng Lu , Jia-Yuan Chen , Thi-Xuyen Bui , Ming-Hong Lin , Te-Hua Fang","doi":"10.1016/j.matchar.2025.115024","DOIUrl":"10.1016/j.matchar.2025.115024","url":null,"abstract":"<div><div>In this study, the FeCoNiCr high-entropy alloy (HEA) with (2 0 0) lattice orientations is manufactured <em>via</em> vacuum arc melting (VAM). The mechanical response of FeCoNiCr HEA is measured using dynamic compression, nanoindentation, and scratching tests, both experimentally and through simulation methods. The effect of microstructure on the mechanical properties of compressed FeCoNiCr HEA pillars was further investigated using Molecular dynamics (MD) simulations. The experimental results showed that the FeCoNiCr HEA micropillars under a 50 <em>μ</em>N loading exhibit more considerable strain energies and compressive displacements than those under a 10 <em>μ</em>N loading. The FeCoNiCr HEA micropillar can withstand a 10 <em>μ</em>N cyclic loading without significant damage but develops a clear concave fold at 250 <em>μ</em>N loading. The hardness measured by nanoindentation was 5.74 GPa. Moreover, the elastic modulus of FeCoNiCr HEA, measured by nanoindentation and <em>in-situ</em> TEM, was 44.36 and 2.85 GPa, respectively, exhibiting a lower elastic modulus than the (1 1 1) lattice orientations. The <em>H</em>/<em>E</em> values for the experimental and MD simulations are calculated to be 0.13 and 0.14, respectively, demonstrating their similarity. The simulation results show that the elastic modulus, ultimate compressive strength, and dislocation density decrease with increasing the aspect ratio. The dislocation distribution with an aspect ratio of 1.5 increases after overcoming the ultimate compression strength. The stacking faults and shear bands are concentrated at the top side grain of the nanopillar, leading the atoms to slip along the grain boundaries.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115024"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838992","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

Microstructures and tensile properties of Fe-30Mn-9Al-0.85C lightweight steel by friction stir processing and post-aging treatment Fe-30Mn-9Al-0.85C轻钢搅拌摩擦处理和后时效处理的组织与拉伸性能

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-12 DOI: 10.1016/j.matchar.2025.115023

Hongyan Lv , Chunyu Wang , Jinghua Zhang , Hongshi Li , Xiaojun He , Huan Li , Ruidong Fu , Yijun Li

{"title":"Microstructures and tensile properties of Fe-30Mn-9Al-0.85C lightweight steel by friction stir processing and post-aging treatment","authors":"Hongyan Lv , Chunyu Wang , Jinghua Zhang , Hongshi Li , Xiaojun He , Huan Li , Ruidong Fu , Yijun Li","doi":"10.1016/j.matchar.2025.115023","DOIUrl":"10.1016/j.matchar.2025.115023","url":null,"abstract":"<div><div>In this study, the microstructures and mechanical properties of Fe-30Mn-9Al-0.85C lightweight steel after friction stir processing (FSP) and post-aging treatment were systemically investigated. The processing zones (PZs) exhibited no macroscopic defects at rotational speeds of 400 rpm, 500 rpm, and 600 rpm with a processing speed of 40 mm/min. Grain refinement occurred in the PZs, and the initial <em>κ</em>-carbides in the base metal dissolved after FSP. Post-aging treatment at 500 °C and 600 °C promoted the precipitation of <em>κ</em>-carbides without inducing grain growth in the PZs. The aged microstructure of the PZs exhibited an incompletely recrystallized state with numerous residue deformation dislocations. Grain boundary and dislocation strengthening had a limited contribution to yield strength, while the precipitation strengthening of <em>κ</em>-carbides played a significant role in controlling the tensile properties of the PZs before and after aging treatment. The optimal tensile properties were achieved using a processing parameter of 500 rpm and 40 mm/min, followed by post-aging treatment at 600 °C for 1 h.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115023"},"PeriodicalIF":4.8,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848568","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 texture variation in laser beam-welded CoCrFeNiMn 激光焊接CoCrFeNiMn的晶体织构变化

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-11 DOI: 10.1016/j.matchar.2025.115030

Nowfal Al-Hamdany , Volker Ventzke , Falk Dorn , Emad Maawad , Norbert Schell , Nikolai Kashaev

{"title":"Crystallographic texture variation in laser beam-welded CoCrFeNiMn","authors":"Nowfal Al-Hamdany , Volker Ventzke , Falk Dorn , Emad Maawad , Norbert Schell , Nikolai Kashaev","doi":"10.1016/j.matchar.2025.115030","DOIUrl":"10.1016/j.matchar.2025.115030","url":null,"abstract":"<div><div>This study examines the crystallographic texture and residual stress variation of a laser-welded CoCrFeNiMn high-entropy alloy (HEA) plate. The HEA plate was welded using a disc laser with a maximum power output of 4 kW, which was also equipped with a bright line weld module and a dual-core fiber with a diameter of 100 and 400 μm, respectively. The welding direction was aligned with the rolling direction. The texture was investigated via high-energy X-ray beam and EBSD. To investigate the crystallographic variation in the welded CoCrFeNiMn HEA plate, the textures were examined in the fusion zone (FZ), the heat affected zone (HAZ), and the base material (BM). The texture observed in the FZ was a combination of the textures present on ±0.1 mm positions from the weld centerline. The texture identified on each side of the centerline of the FZ comprises fibers oriented 〈100〉 // to the transverse direction, exhibiting a ± 10° rotation around the rolling direction. The texture observed in the BM exhibits a rolling-type texture, represented by {110}<112> brass, {112}<111> Cu, and {123}<643> S components, with a dominant {110}<112> brass component and a sharpness of 4.8 mrd. The microhardness profiles indicate a slight decline in hardness, from 260 HV0.1 for the BM to 240 HV0.1 in the FZ. The mechanical properties of the welded samples exhibited a slight reduction in ultimate tensile strength (from 900 ± 15 MPa to 830 ± 10 MPa) and elongation (from 18 ± 3 % to 13 ± 3 %). This decrease in mechanical properties could be attributed to the presence of large grains in the FZ, the dissolution of precipitation, and alterations in texture. This alloy displays excellent weldability, making it a promising candidate for engineering applications.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115030"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828274","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

High strength and plasticity of periodic heterostructured 304 L steel fabricated by laser penetration strip (LPS) AM technology 采用激光熔透带增材制造工艺制备高强度、高塑性的周期性异质钢304 L

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-11 DOI: 10.1016/j.matchar.2025.115036

Yongqiang Zhang , Yongxin Lu , Pubo Li , Gang Shen

{"title":"High strength and plasticity of periodic heterostructured 304 L steel fabricated by laser penetration strip (LPS) AM technology","authors":"Yongqiang Zhang , Yongxin Lu , Pubo Li , Gang Shen","doi":"10.1016/j.matchar.2025.115036","DOIUrl":"10.1016/j.matchar.2025.115036","url":null,"abstract":"<div><div>In order to overcome the contradiction between additive efficiency and higher laser power and wall thickness limit, and to obtain the desired heterostructured thin-walled components, an innovative laser penetration strip additive manufacturing (LPS AM) technology is presented. We apply the LPS AM technology to the direct fabrication of thin-walled 304 L steel with heterogeneous lamellar structures (HLS), which consisting of periodic equiaxed grain regions (EGR) and columnar grain regions (CGR). EGR presents a spherical austenite matrix with some nano-sized irregular ferrite grains, while CGR presents columnar austenite grains segmented by banded/globular ferrites of different sizes to form a special nano-columnar biphase structure. Periodic HLS 304 L, with non-uniform grain sizes and different phases ranging from nanometers to micrometers, provides a synergistic strengthening effect and strain distribution capability, achieving high Heterogeneous Deformation Induced (HDI) strengthening and hardening. The TRIP effect, HDI strengthening and HDI strain hardening contribute to high strength and plasticity for HLS 304 L alloy. This innovative approach has the potential to be applied to the production of other thin-walled alloys with hierarchical structures and superior strength.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115036"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868736","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

Improving Tb diffusion and magnetic properties in fine-grained NdFeB magnet by Zr addition 添加Zr改善细晶钕铁硼磁体中Tb的扩散和磁性能

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-11 DOI: 10.1016/j.matchar.2025.115016

Wenze Su , Jiahao Lu , Lei Xiao , Gang Fu , Dawei Shi , Chen Wang , Zhiyang Yu , Peng Wu

{"title":"Improving Tb diffusion and magnetic properties in fine-grained NdFeB magnet by Zr addition","authors":"Wenze Su , Jiahao Lu , Lei Xiao , Gang Fu , Dawei Shi , Chen Wang , Zhiyang Yu , Peng Wu","doi":"10.1016/j.matchar.2025.115016","DOIUrl":"10.1016/j.matchar.2025.115016","url":null,"abstract":"<div><div>In this work, efficient grain boundary diffusion (GBD) of Tb can be achieved in fine-grained sintered Nd-Fe-B magnet through the addition of Zr. The magnets were prepared using Nd-Fe-B powder with an average particle size of 2.6 μm. Compared with the magnet without Zr addition, the intrinsic coercivity of the Zr-added magnet increases by 3.55 kOe after GBD with the increment of 15.0 %, and the squareness of the demagnetization curve is improved by 5.7 %. The Zr element can combine with the C element in the magnet to form block-like ZrC precipitates, which inhibits the formation of harmful rare-earth carbon phase and reduces the ineffective depletion of rare earth elements. In addition, the Zr element can also combine with the B element to form needle-like ZrB<sub>2</sub> precipitates. The consumption of B element increases the volume fraction of RE-rich phase, thus providing more liquid-phase channels for the diffusion of Tb. The ZrC and ZrB<sub>2</sub> precipitates distributed at the grain boundary (GB) can broaden the width of the GB phase, which not only provide broader channels for Tb diffusion, but also improve the magnetic isolation of the main phase grains. By the addition of Zr, the diffusion depth of Tb in the magnet is increased. Meanwhile, the accumulation of Tb on the diffusion surface of the magnet reduces significantly, and the thin and uniform Tb-rich shell is formed on the exterior of the main phase grains in the magnet.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115016"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845052","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

Ni-based superalloy fabricated by wire arc additive manufacturing exhibits excellent mechanical properties at 650 °C by combining ultrasonic-assisted and solution treatment 采用超声辅助和固溶相结合的方法制备的镍基高温合金在650℃时表现出优异的力学性能

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-11 DOI: 10.1016/j.matchar.2025.115032

Mingfang Xu , Yuhua Chen , Timing Zhang , Jilin Xie , Min Zheng , Shanlin Wang , Ke Wei , Liping Zhang , Limeng Yin

{"title":"Ni-based superalloy fabricated by wire arc additive manufacturing exhibits excellent mechanical properties at 650 °C by combining ultrasonic-assisted and solution treatment","authors":"Mingfang Xu , Yuhua Chen , Timing Zhang , Jilin Xie , Min Zheng , Shanlin Wang , Ke Wei , Liping Zhang , Limeng Yin","doi":"10.1016/j.matchar.2025.115032","DOIUrl":"10.1016/j.matchar.2025.115032","url":null,"abstract":"<div><div>Fine-grained samples of Inconel 625 (IN625) superalloy were fabricated using ultrasonic-assisted wire arc additive manufacturing (UA-WAAM). Both UA-treated and non-UA-treated samples underwent solution treatment (ST) at 1200 °C to achieve a homogeneous microstructure and complete recrystallization. The mechanical properties of UA-WAAM IN625 were evaluated at room temperature (RT) and 650 °C, and compared with WAAM IN625. The results showed that complete recrystallization eliminated the columnar grain structure and dislocations. The microstructure is composed of numerous recrystallized grains and annealed twins. Compared to the ST samples, the UA + ST samples exhibited smaller grain sizes, a higher density of recrystallized grains, and more annealing twins. All samples displayed significant ductility at RT. The tensile curves at 650 °C for both samples showed type C serrated behavior after surpassing the yield point, continuing until fracture. Intergranular cracks caused by grain boundary sliding and voids from stress concentration at the triple junction were the main causes of high-temperature failure. The UA-treated samples showed superior mechanical properties at both RT and 650 °C, due to the enhanced hindering effect of grain boundaries/twin boundaries on dislocations in fine grains. The findings of this study demonstrated the significant effects of UA and ST on the high-temperature properties of IN625 superalloy produced by WAAM.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115032"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845053","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

Design and characterization of novel multi-phase AlMgZnCuSi light-weight high-entropy alloy with high potential as PCM for energy storage applications 新型多相 AlMgZnCuSi 轻质高熵合金的设计与表征，该合金极有可能用作储能应用中的 PCM

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-11 DOI: 10.1016/j.matchar.2025.115027

Godson Nyaforkpa, Mohamed A.H. Gepreel

{"title":"Design and characterization of novel multi-phase AlMgZnCuSi light-weight high-entropy alloy with high potential as PCM for energy storage applications","authors":"Godson Nyaforkpa, Mohamed A.H. Gepreel","doi":"10.1016/j.matchar.2025.115027","DOIUrl":"10.1016/j.matchar.2025.115027","url":null,"abstract":"<div><div>This paper presents the design, synthesis, and characterization of a lightweight and cost-effective multi-phase eutectic high-entropy alloy, <span><math><msub><mi>Al</mi><mn>35</mn></msub><msub><mi>Mg</mi><mn>30</mn></msub><msub><mi>Zn</mi><mn>15</mn></msub><msub><mi>Cu</mi><mn>10</mn></msub><msub><mi>Si</mi><mn>10</mn></msub></math></span>(at.%) with a density of 3.30 g/cm<sup>3</sup>. The chemical composition of the alloy was meticulously selected to have a mixture of eutectic and intermetallic phases. The alloy is produced by melting followed by a semisolid forging process conducted at 510 °C, employing various holding times to investigate the behavior and phase transformations associated with this alloy. The alloy showed four major phases: FCC (<span><math><mi>α</mi></math></span>-Al) solid solution, Al<sub>2</sub>Cu, Mg<sub>2</sub>Si intermetallic, and FCC Mg-Al-Zn compounds. The semisolid forging process demonstrated remarkable plasticity through reducing the sample thickness by 35% and 70%. The alloy exhibited a high latent heat capacity of phase change, reaching up to 168.9 kJ/kg at around 450<span><math><mo>°</mo><mi>C</mi></math></span>, where partial melting of the eutectic phase occurs. This value ranks this alloy among the highest values reported for high-temperature metallic phase change materials. The novel alloy by its nature also boasts partial melting at high temperatures, eliminating the need for costly heat transfer enhancement techniques required by other PCMs. The oxidation kinetics showed an increasing pattern of weight change, adhering to a parabolic rate law. The semisolid forged sample, which was 70% oxidized, displayed the lowest parabolic rate constant of 0.233 × 10<sup>−2</sup> g/cm<sup>2</sup> after 500 min indicating a low oxidation rate, thus having good oxidation resistance.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115027"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828275","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