Advanced Engineering Materials最新文献

{"title":"Experiments and Atomic Insights on the Tribological Properties of Functionalized Graphene-Reinforced Polyetheretherketone/Polytetrafluoroethylene Composites","authors":"Yan Wang,&nbsp;Bin Yang,&nbsp;Henan Tang,&nbsp;Zhen Dong,&nbsp;Shijie Wang","doi":"10.1002/adem.202500119","DOIUrl":"10.1002/adem.202500119","url":null,"abstract":"<p>This study explores the influence of functionalized graphene nanosheets (GNSs) on the tribological behavior of polyetheretherketone (PEEK)/polytetrafluoroethylene (PTFE) composites. To this end, pure GNS (PGNS) and GNS grafted with hydroxyl, carboxyl (COOH-GNS), and amino functional groups are prepared to fabricate PEEK/PTFE composite samples for friction experiments. The microstructure of the worn surface and energy dispersive spectroscopic distribution of the dual-surface transfer film are analyzed. The experimental results demonstrate that the COOH-GNS-reinforced PEEK/PTFE composite samples exhibit outstanding tribological properties. Specifically, the wear rate decreases by 20.9% compared to that of the PGNS-reinforced PEEK/PTFE composite samples, and a denser transfer film is formed on the dual surface. Additionally, molecular dynamics simulations are used to simulate the friction process and investigate the mechanism by which functionalized GNS enhances the tribological properties of the PEEK/PTFE composites. The simulation results reveal that the functional groups remarkably enhance the interaction between the GNS and the PEEK/PTFE composites, reduce the temperature and atomic concentration at the friction interface, and weakene the interaction between the PEEK/PTFE molecular chains and the friction pair, thereby improving the wear resistance of the PEEK/PTFE composites. Thus, this study provides a theoretical basis for the development of PTFE-based composites.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 16","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Mn Element on the Microstructure, Thermal Stability, and Strain Recovery Characteristics of Cu–12.0Al–4.0Ni Alloy","authors":"Zixuan Shao,&nbsp;Jianhua Tang,&nbsp;Yue Jiang,&nbsp;Xin Zhang,&nbsp;Xin Zhang,&nbsp;Bo Cui,&nbsp;Zhizhong Dong","doi":"10.1002/adem.202500492","DOIUrl":"10.1002/adem.202500492","url":null,"abstract":"<p>This paper presents a comprehensive investigation into the influence of manganese on the microstructural characteristics and properties of Cu–12.0Al–4.0Ni–<i>x</i>Mn high-temperature shape memory alloys. The study reveals that the matrix structure of these alloys is primarily composed of both 18R and 2H martensitic phases, with a notable increase in the proportion of the 18R phase as the Mn content rises. Notably, the addition of Mn significantly enhances the thermal stability of the Cu–12.0Al–4.0Ni alloy system. Upon examining the alloys with varying Mn contents, it is observed that when the Mn content is less than 1.5 wt%, the phase transformation temperatures exhibit considerable fluctuations during thermal cycling. In contrast, when the Mn content reaches or exceeds 1.5 wt%, the Cu–12.0Al–4.0Ni–<i>x</i>Mn alloy demonstrates commendable thermal stability even after 50 thermal cycles. Furthermore, among the studied compositions, the Cu–12.0Al–4.0Ni–1.5Mn alloy exhibits optimal plasticity of 12.8% and shape memory effect of 6.4%.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 16","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of the Microstructure and Mechanical Properties of a Novel Functionally Graded Material Based on Al–Zn–Cu–Mg Alloy Matrix Reinforced with Few-Layered Graphene","authors":"Gökçe Borand,&nbsp;Deniz Uzunsoy","doi":"10.1002/adem.202402933","DOIUrl":"10.1002/adem.202402933","url":null,"abstract":"<p>Composite materials satisfactorily suit the needs of industrial applications. However, with the advancement of modern technology, functionally graded materials (FGMs) are becoming increasingly important in order to meet evolving customer demands. The reinforcement material in FGMs varies in quantity and arrangement across different regions, resulting in continuously changing properties and a non-uniform microstructure. Various industries widely employ aluminum (Al) alloys due to their favorable features, which include excellent stiffness, ductility, a high strength to weight ratio, and corrosion resistance. The current study facilitates the powder metallurgy (P/M) production of a novel generation of a six-layer Al–Zn–Cu–Mg alloy material graded according to increasing few-layered graphene (FLG) reinforcement. The increase in the FLG content between the layers, from the first to the last layer, results in an increase in the hardness value (HV) of the FGM by ≈39.13%. The most effective strengthening mechanism for FGM is grain size reduction, which is a result of the FLG content present in each layer. Moreover, the load transfer and reinforcing effect of graphene are enhanced by the strong interface bond that occurs between FLG and the matrix.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 16","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Temperature Distribution on the Microstructure and Edge-Cracking Behavior of AZ31 Sheets During Online Heating Rolling","authors":"Peng Zhang,&nbsp;Qiuyan Shen,&nbsp;Yongxing Ba,&nbsp;Qiang Liu,&nbsp;Liangyin Wu,&nbsp;Jiangfeng Song,&nbsp;Bin Jiang,&nbsp;Fusheng Pan","doi":"10.1002/adem.202500457","DOIUrl":"10.1002/adem.202500457","url":null,"abstract":"&lt;p&gt;The occurrence of edge cracks in magnesium alloy rolled sheets is closely related to the temperature distribution during rolling. However, the detailed temperature evolution of the sheet and its effects on edge cracking remain unclear. Herein, an online heating rolling (O-LHR) temperature acquisition system is developed using embedded thermocouples. The temperature distribution of AZ31 alloy sheet at different rolling temperatures (180, 220, 260, and 300 °C) is quantified through mathematical expression and experimental validation, and its effects on the microstructure and edge-cracking behavior are studied. The modified mathematical expression &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;Δ&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;T&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;mi&gt;o&lt;/mi&gt;\u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;mi&gt;a&lt;/mi&gt;\u0000 &lt;mi&gt;l&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mi&gt;k&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;{&lt;/mo&gt; \u0000 &lt;mrow&gt;\u0000 &lt;mfrac&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;h&lt;/mi&gt;\u0000 &lt;mi&gt;r&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;Δ&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;T&lt;/mi&gt;\u0000 &lt;mi&gt;a&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;Δ&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;C&lt;/mi&gt;\u0000 &lt;mi&gt;ρ&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;mo&gt;+&lt;/mo&gt;\u0000 &lt;mi&gt;h&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mfrac&gt;\u0000 &lt;mo&gt;+&lt;/mo&gt;\u0000 &lt;mfrac&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;4&lt;/mn&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;h&lt;/mi&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;Δ&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;T&lt;/mi&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;/msub&gt;","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 16","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advancements in Understanding the Characteristics of Gas Atomized Powders: A Review","authors":"Zhongliang Zhou,&nbsp;Wenhai Sun,&nbsp;Weiyan Lu,&nbsp;Suode Zhang,&nbsp;Jianqiang Wang","doi":"10.1002/adem.202500270","DOIUrl":"10.1002/adem.202500270","url":null,"abstract":"<p>The morphology and particle size distribution (PSD) of atomized powder significantly affect the uniformity and flowability characteristics of the powder, and ultimately have a profound impact on the mechanical properties of additive manufacturing components. This article systematically reviews the key factors affecting powder particle size, deeply analyzes the formation mechanism and causes of defects, such as satellite particles, irregular particles, and hollow powders, and reveals the inherent relationship between powder particle size and sphericity. It should be noted that in the study of powder PSD, a systematic understanding with outstanding practical guidance value is summarized by integrating experimental observation data and numerical simulation results, however, further theoretical analysis is required to advance the fundamental understanding of this field. This discussion has important guiding significance for obtaining high-quality atomized powders.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 16","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Performance Microwave-Absorbing Hemp Textile: Ni-Zn Ferrite and Multiwalled Carbon Nanotubes-Infused Nanocomposite for X-Band Electromagnetic Interference Shielding","authors":"Pembe Teber,&nbsp;Ahmet Teber,&nbsp;İbrahim Hakkı Karakaş","doi":"10.1002/adem.202500835","DOIUrl":"https://doi.org/10.1002/adem.202500835","url":null,"abstract":"<p>This study aims to develop a flexible and sustainable electromagnetic (EM) wave-absorbing material by using hemp fabric as a substrate incorporated with multiwalled carbon nanotubes (MWCNTs) and magnetic Ni-Zn ferrite nanoparticles (NPs). In this context, the objective is to achieve effective EM attenuation across a wide frequency range using a green, lightweight composite to meet the rising demand for ecofriendly shielding in electronic and communication systems. Ni_0.5Zn_0.5Fe₂O₄ and MWCNT composite NPs are uniformly dispersed in a molten paraffin binder and impregnated into hemp fabrics. The magnetic NPs are synthesized via the microwave-assisted combustion method. The EM parameters of the resulting structure are determined in the X-band using experimental scattering data and the Nicholson–Ross–Weir method. Absorption performance is evaluated based on varying weight ratios of magnetic NPs and MWCNTs, with an emphasis on impedance matching. The results indicate that combining dielectric and magnetic components significantly enhances absorption. A maximum reflection loss of −72.42 dB and a 3.81 GHz bandwidth (covering over 90.71% of the X-band) are achieved at 10.08 GHz. Increasing Ni-Zn content shifts the resonance to higher frequencies. This sustainable, flexible composite shows strong potential for electromagnetic interference shielding, particularly in defense applications requiring radar invisibility.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 18","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antimicrobial Titanium–Copper Alloys: The Role of Microstructure in Arc-Melted Compositions","authors":"Daisy Rabbitt,&nbsp;Paraic O’Kelly,&nbsp;Victor M. Villapún,&nbsp;Luke N. Carter,&nbsp;Alexander J. Knowles,&nbsp;Sophie C. Cox","doi":"10.1002/adem.202500347","DOIUrl":"10.1002/adem.202500347","url":null,"abstract":"<p>Copper-containing alloys have attracted global attention in response to rising rates of orthopedic implant infections and antimicrobial resistance. Two theories have emerged for the antimicrobial mechanisms of titanium–copper alloys: ion release and contact sterilization. While previous studies have focused on the overall effect of intermetallic Ti₂Cu phases, this research digs deeper, unpicking the influence of precipitate size and morphology. Herein, heat treatment (950 °C and 760/820 °C) of cast Ti-11.5Cu and Ti-33Cu (wt%) alloys may be used as a tool to tune antimicrobial potency through microstructural refinement. Specifically, it is shown that nanoscale precipitates (≈30 nm) of Ti₂Cu exhibit limited <i>in vitro</i> efficacy against <i>Staphylococcus aureus</i>. While larger (≈5 μm), rounded precipitates exhibit superior action due to increased surface contact. Contrary to the literature, this study shows no detectable Cu²⁺ ion release in 0.9% NaCl over 7 days, measured by inductively coupled plasma optical emission spectroscopy, suggesting that under these manufacturing conditions, the antimicrobial mechanism is solely contact dependent. <i>In vitro</i> studies indicate that while Ti₂Cu phases contribute to antimicrobial properties, a balance in Cu content and precipitate size is critical for both bacterial and native bone cell cytotoxicity. Overall, this study demonstrates a significant link between phase size, morphology, and desirable antimicrobial properties of exploratory cast Ti–Cu alloys.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 16","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202500347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic Behavior of Fused Filament Fabricated Continuous Ramie Fiber-Reinforced Polypropylene Composites under Diverse Loading Conditions","authors":"Hao Lin,&nbsp;Ruijun Cai,&nbsp;Jiangyang Xiang,&nbsp;Yisen Liu,&nbsp;Yangyu Huang,&nbsp;Yanni Rao,&nbsp;Yong Peng,&nbsp;Kui Wang,&nbsp;Said Ahzi","doi":"10.1002/adem.202500440","DOIUrl":"10.1002/adem.202500440","url":null,"abstract":"<p>The combination of continuous natural fibers and polypropylene enables the fabrication of environmentally friendly composites with recyclability, light weight, and high strength. Additionally, fused filament fabrication (FFF) 3D printing offers reliable process for efficient customized manufacturing of fiber-reinforced composites. Therefore, this study fabricates continuous ramie fiber-reinforced polypropylene (CRFRPP) composites through the FFF technique. Considering that composites are sensitive to various external conditions such as temperature, loading direction, and loading rate, this work investigates the mechanical behaviors of CRFRPP under a wide range of temperatures and strain rates when loaded parallel and perpendicular to the fiber orientation. The results indicate that the compressive strength of 3D-printed CRFRPP under loading in the parallel fiber direction is higher than that in the perpendicular one. The maximum compressive strength is observed to be 176 MPa at a temperature of −40 °C and a strain rate of 2600 s⁻¹, when loaded in the parallel fiber direction. Under dynamic loading, CRFRPP presents brittle behavior at lower temperatures (−40 and −10 °C) and softening behavior after yielding at higher temperatures (20 and 50 °C). Moreover, the CRFRPP exhibits different failure mechanisms that varied considerably depending on the imposed test conditions.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 16","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of 77 μm Mg-0.5Ce Alloy Foil by Three-Pass On-Line Heating Rolling and a Single Annealing","authors":"Yongxing Ba,&nbsp;Peng Zhang,&nbsp;Qiuyan Shen,&nbsp;Feiyan Xiao,&nbsp;Jiangfeng Song,&nbsp;Bin Jiang,&nbsp;Fusheng Pan","doi":"10.1002/adem.202500892","DOIUrl":"https://doi.org/10.1002/adem.202500892","url":null,"abstract":"<p>Mg-0.5Ce alloy foils demonstrate significant potential as anodes for rechargeable magnesium ion batteries. However, the conventional rolling process of magnesium alloy foils faces challenges in complexity, leading to high costs. This study employs a large-strain rolling strategy to fabricate Mg-0.5Ce alloy foils through a three-pass process with single intermediate annealing. The formability, microstructure, and mechanical properties of Mg-0.5Ce alloy sheets and foils are characterized. Initial attempts using on-line heating rolling reveal limitations in sheet formability below 0.25 mm thickness, preventing the achievement of large reduction rolling. The annealing at 300, 350, 400, and 450 °C for 1 h of 0.25 mm Mg-0.5Ce alloy sheet largely improves its formability. The formability improves gradually as the annealing temperature rises from 300 to 400 °C, with optimal performance achieved at 400 °C (IE = 4.2 mm, tensile elongation = 10.0%). The reason of the change in formability are the moderate growth of grains, the improvement of recrystallization, and the change of texture. Then, rolling experiments of annealed sheet demonstrated that annealing at 400 °C enabled a single-pass reduction of 70%, achieving a 0.077 mm foil.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 18","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hf Addition Enhances Structural Stability and Mechanical Properties of NiTi Alloys across a Broad Temperature Range","authors":"Bo Li,&nbsp;Yueyin Ma,&nbsp;Lijing Zheng,&nbsp;Hu Zhang","doi":"10.1002/adem.202500712","DOIUrl":"10.1002/adem.202500712","url":null,"abstract":"<p>The potential application of Ni-rich NiTi(Hf) alloys as structural materials for applications across a broad temperature range, with a focus on thermal–mechanical coupling, is investigated. Specifically, the microstructure and mechanical properties of Ni₅₅Ti₄₅ and Ni₅₅Ti₄₂Hf₃ alloys are analyzed under various temperature conditions. The role of Hf doping in enhancing the thermal stability and strengthening behavior is examined following 100 h heat treatments at temperatures ranging from 400 to 600 °C, along with the thermo–mechanical coupling effects on mechanical properties from −150 to 600 °C. In the Ni₅₅Ti₄₂Hf₃ alloy, long-term heat treatment leads to the coarsening of the Ni₄Ti₃ phase and the formation of the H-phase, Ni₃Ti₂, and Ni₃(Ti, Hf)₂ phases. Compared to the Ni₅₅Ti₄₅ alloy, the Hf-doped alloy exhibits superior mechanical properties at high temperatures, particularly in terms of high-temperature resistance. After treatment at 600 °C for 100 h, the hardness of the Hf-containing samples remains around 600 HV. Furthermore, the high-temperature strength of the Ni₅₅Ti₄₂Hf₃ alloy at 500 and 600 °C is nearly double that of the Ni₅₅Ti₄₅ alloy. These findings highlight Hf doping as a promising strategy for the development of high-temperature structural materials in Ni-rich NiTi alloys.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 17","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}