Journal of Materials Science & Technology最新文献

{"title":"Effect of hot oscillating pressing on microstructure and mechanical properties of FGH4095 nickel-based superalloy","authors":"Jingwei Chen, Chuncheng Lu, Enhui Wang, Tao Yang, Chunyu Guo, Yan Fan, Yingnan Shi, Jinhui Wang, Xinmei Hou","doi":"10.1016/j.jmst.2025.05.040","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.040","url":null,"abstract":"The preparation process is of great importance to the densification of nickel-based powder metallurgy superalloys. In this work, a novel approach of hot oscillating pressing (HOP) has been adopted to prepare dense FGH4095 superalloy (FGH4095). For comparison, the hot pressing (HP) process is also applied. MSC Marc is employed to optimize the sintering parameters of the HOP process. Benefited from the enhanced grain boundary sliding and plastic deformation resulting from the oscillation pressure, FGH4095 possesses a higher precipitation proportion of secondary γ′ phase with lower content of thermally induced porosity (TIP) and previous particle boundaries (PPBs) precipitated phases. Therefore, the room-temperature yield strength and ultimate tensile strength reach up to 1153 and 1433 MPa with an elongation of 10.46%. A ductile damage model has been established to further investigate the mechanical properties of FGH4095 prepared by the HOP process. Based on the ABAQUS simulation, the tensile behavior of FGH4095 is predicted.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"17 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479490","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}

{"title":"Intensive analysis of anti-corrosion properties of cold rolled steel in trichloroacetic acid solution by camellia oleifera shells derived carbon dots","authors":"Min Tang, Shuduan Deng, Yujie Qiang, Dandan Shao, Xianghong Li","doi":"10.1016/j.jmst.2025.05.042","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.042","url":null,"abstract":"Carbon dot inhibitors (UTCDs, HSCDs) are successfully prepared for the first time by ultrasonic treatment and hydrothermal synthesis from <em>Camellia oleifera</em> shells (COS), respectively. The fluorescence properties and structures of UTCDs and HSCDs, as well as their corrosion inhibition and adsorption mechanisms on cold rolled steel (CRS) in trichloroacetic acid (Cl₃CCOOH) solution, are investigated in depth. It is found that HSCDs exhibit stronger fluorescence and higher corrosion inhibition performance than UTCDs at a lower dose (300 mg L⁻¹, 91.6%). They possess amorphous carbon matrix, crystalline regions, surface functional groups, and active compounds. HSCDs have multiple protective mechanisms, including forming physical barriers, reducing oxides, and depleting C and O atoms in the corrosive medium. The enhancement of synthesis methods enables the mass production of HSCDs that effectively prevent corrosion.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"52 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479491","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}

{"title":"Achieving excellent strength-ductility synergy in orientation-heterostructured Mg-Y alloy via element segregation-assisted pinning of twin boundary","authors":"Yuliang Yang, Yuxin Liu, Zhufeng He, Ye Yuan, Lifang Sun, Shuang Jiang, Nan Jia","doi":"10.1016/j.jmst.2025.06.009","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.06.009","url":null,"abstract":"The low strength, poor ductility, and limited cold formability of Magnesium (Mg) alloys have restricted their wide application as structural materials. The \"heterostructure\" design is a promising strategy for developing high-performance materials. In this work, four orientation-based heterostructured materials were fabricated by modulating bulk Mg-2.9Y (wt%) alloy to a single-pass strain of 10% for five complete triaxial cyclic compression (TCC) cycles along planes A, B, and C, followed by an additional compression on plane A. This process was combined with the subsequent annealing at 200°C for 1 h, leading to the hard-oriented 10%-5 cycles and 10%-5 cycles-200°C/1 h materials together with the soft-oriented 10%-5 cycles+A and 10%-5 cycles+A-200°C/1 h materials. They were characterized by dense refined twins and fragmented grains embedded in coarse-grained matrix. Compared to the TCC-processed materials, the annealed materials showed more pronounced strengthening. The 10%-5 cycles+A-200°C/1 h material exhibited the optimal combination of strength and ductility, with the periodic segregation of Y atoms at dense twin boundaries strengthening the hard domains and increasing deformation incompatibility between the soft and hard domains. The geometrically necessary dislocations significantly accumulated at the twin boundaries, resulting in pronounced hetero-deformation induced (HDI) strengthening. At high strains, the pinning effect of Y atoms gradually weakened, and &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;{&lt;/mo&gt;&lt;mn is=\"true\"&gt;10&lt;/mn&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mn is=\"true\"&gt;1&lt;/mn&gt;&lt;mo is=\"true\"&gt;&amp;#xAF;&lt;/mo&gt;&lt;/mover&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;mo is=\"true\"&gt;}&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.779ex\" role=\"img\" style=\"vertical-align: -0.812ex;\" viewbox=\"0 -846.5 3073 1196.3\" width=\"7.137ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;use is=\"true\" xlink:href=\"#MJMAIN-7B\"&gt;&lt;/use&gt;&lt;g is=\"true\" transform=\"translate(500,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-31\"&gt;&lt;/use&gt;&lt;use x=\"500\" xlink:href=\"#MJMAIN-30\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(1501,0)\"&gt;&lt;g is=\"true\" transform=\"translate(35,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-31\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(0,198)\"&gt;&lt;use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"&gt;&lt;/use&gt;&lt;use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(2072,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-32\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;use is=\"true\" x=\"2572\" xlink:href=\"#MJMAIN-7D\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"26 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488358","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}

{"title":"Super-sensitive near-infrared organic photoelectric synaptic transistors based on sandwich-structured active layer","authors":"Hongyan Yu, Jingchun Sun, Xiaoli Zhao, Ning He, Guodong Zhao, Jiayi Zou, Yanping Ni, Chuang Xue, Jing Sun, Junru Zhang, Guoqiang Ren, Pengbo Xi, Cong Zhang, Yijun Shi, Yanhong Tong, Qingxin Tang, Yichun Liu","doi":"10.1016/j.jmst.2025.05.041","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.041","url":null,"abstract":"High-sensitivity near-infrared organic photoelectric synaptic transistors present promising opportunities for developing machine-intelligent vision applications. However, the low sensitivity of organic photoelectric synaptic transistors remains a critical challenge, hindering their practical application. Although few approaches have attempted to address this issue, the short diffusion distance of photogenerated excitons limits the dissociation efficiency of excitons. Here, we present a super-sensitive near-infrared photoelectric synaptic transistor based on a sandwich structure photosensitive active layer and realize double-channel synergistic modulation. The devices have multiple functionalities that imitate the human visual system and achieve extremely high photoelectric sensitivity (∼10⁶) under near-infrared illumination (0.22 mW/cm²). The method of realizing a double-channel modulator with a sandwich structure can be applied to other organic polymer semiconductor materials to realize super-sensitive photoelectric synapses. This method paves the way for the invention of super-sensitive near-infrared neuromorphic imaging systems, which have enormous promise for artificial intelligence and intelligent night vision.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"38 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479492","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}

{"title":"Microstructures, mechanical properties and deformation mechanism of heterogeneous metal materials: A review","authors":"Shuaishuai Liu, Guangsheng Huang, Manoj Gupta, Bin Jiang, Fusheng Pan","doi":"10.1016/j.jmst.2025.03.109","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.109","url":null,"abstract":"In recent years, a new type of fast emerging heterostructure materials (HSMs) has emerged in the field of metal materials. This material is composed of soft and hard regions with significant strength differences due to the heterogeneity of microstructure, crystal structure and composition. It can effectively break the inverted relationship between strength and ductility of traditional homogeneous materials, which mainly depends on the synergistic strengthening effect: hetero-deformation induced (HDI) strengthening and hardening. This paper adequately reviewed the heterogeneous deformation fundamentals, the microstructure characteristics and mechanical properties of various HSMs prepared by different processing methods. Meanwhile, we assess the mechanical behavior and influencing factors of the synergistic strengthening effect from the perspective of microscopic strain/stress, damage mechanism and key heterostructured parameters. In addition, the numerical simulations of HSMs are systematically revealed, which offers theoretical guidance for their quantitative design with the best mechanical properties. This paper aims to construct the relationships among the heterostructures, microscopic deformation mechanisms and macroscopic mechanical properties, provide a valuable reference for the optimal heterostructures, and explore crucial scientific issues that warrant further investigation.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"56 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479489","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}

{"title":"Multi-target nanocomposites for Alzheimer’s treatment via microenvironment modulation and β-amyloid plaque clearance","authors":"Tongtong Hou, Dan Nie, Minling Ding, Chaoli Wang, Kun Mei, Xuanzhao Lu, Xin Wang, Selene Tang, Hong Wu, Ping Guan, Wenlei Zhu, Xiaoling Hu","doi":"10.1016/j.jmst.2025.04.081","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.081","url":null,"abstract":"Simultaneously addressing Aβ₄₂ aggregation and oxidative stress within the Alzheimer's disease (AD) microenvironment has emerged as a promising therapeutic strategy for countering the complex pathogenesis of AD. In this study, we developed a multifunctional nanocomposite (GQDs@MPN) with reactive oxygen species scavenging properties. This nanocomposite consists of graphene quantum dots encapsulated within a metal-polyphenol network (GQDs@MPN) formed by physiological Co (II)-coordinated epigallocatechin gallate (EGCG). GQDs@MPN effectively modulates the AD microenvironment by inhibiting Aβ₄₂ amyloidosis, attenuating oxidative stress, and regulating microglial activity. In vivo experiments demonstrated that GQDs@MPN, capable of crossing the blood-brain barrier (BBB), significantly reduced Aβ₄₂ deposition in APP/PS1 mice. Additionally, GQDs@MPN could exert its anti-inflammatory function by scavenging intracellular ROS and regulating the transformation of microglia from M1 phenotype to M2 phenotype, thus alleviating neuroinflammation. The underlying molecular mechanism is the up-regulation of nuclear factor-erythroid 2-related factor 2 (Nrf2) to clear ROS and subsequently inhibit the nuclear factor κB (NF-κB) signaling pathway. GQDs@MPN also effectively alleviated cognitive impairment and exhibited favorable biocompatibility in APP/PS1 mice. These findings suggest that GQDs@MPN is a promising candidate for multi-targeted AD therapy. We propose that such multifunctional nanocomposites could offer new avenues for developing novel AD inhibitors.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"27 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144371081","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}

{"title":"Unravelling the limit of the coercivity enhancement in PrAl grain boundary diffusion processed Nd‒La‒Ce‒Fe‒B magnets","authors":"Wang Chen, Hansheng Chen, Jiaying Jin, Liang Zhou, Mengfan Bu, Haoruo Zhou, Mi Yan, Simon P. Ringer","doi":"10.1016/j.jmst.2025.05.039","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.039","url":null,"abstract":"The grain boundary diffusion (GBD) process is widely used to enhance the coercivity of Nd‒Fe‒B sintered magnets, representing a critical materials technology for advancing the electrification revolution. However, it is well known that the enhancement in coercivity achievable through the GBD process appears to reach a limit. To overcome this limitation, it is essential to thoroughly understand the formation of the magnetically hardening matrix shells and the evolution of the grain boundary (GB) phases along the diffusion path. Here we present the microstructural and magnetic evolution of the Pr-Al-rich matrix shells and the GB phases along the diffusion path in the Pr₈₀Al₂₀ GBD processed Nd‒La‒Ce‒Fe‒B magnets. Firstly, the Pr/total rare earth (TRE) ratio remains relatively constant in the Pr-Al-rich matrix shells from the magnet surface to an interior diffusion depth of ∼500 µm. The consistent Pr/TRE ratio identified within the matrix shells means that there is not a sustained increase in the nucleation field near the RE₂Fe₁₄B matrix grain/GB interface. Secondly, from the magnet surface to an interior diffusion depth of ∼500 µm, the antiferromagnetic high-Al δ-type RE‒Fe‒Al phase at the GBs transforms to a ferromagnetic low-Al μ-type or amorphous RE‒Fe‒Al phase. The predominance of the ferromagnetic low-Al μ-type or amorphous RE‒Fe‒Al phase beyond this diffusion depth implies that, apart from this sub-surface region, there is a lack of magnetic isolation of the adjacent ferromagnetic RE₂Fe₁₄B matrix grains through most of the bulk magnet. These factors jointly contribute to constraining or limiting the coercivity enhancement. We discuss how the microstructural origins of the limits to the coercivity enhancement in the GBD processed magnets found here can enable future design approaches for producing thicker Nd‒La‒Ce‒Fe‒B magnets with higher coercivity.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"45 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144371082","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}

{"title":"Modulating electromagnetic response through the regulation of built-in electric fields","authors":"Chenming Liang, Zhiling Hou, Martin C. Koo, Feifei Xu, Shuang Bai, Yunxia Bai, Yu Zhang, Bo Cai, Peiyan Zhao, Guangsheng Wang","doi":"10.1016/j.jmst.2025.03.110","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.110","url":null,"abstract":"The construction of built-in electric fields (BIEF) in heterogeneous structures represents an effective approach for optimizing the electromagnetic (EM) parameters of composite materials. However, effectively regulating the BIEF intensity within the material matrix to better address the issues of dielectric constant frequency dependence and impedance mismatch remains a significant challenge. In this manuscript, a novel material Co@N-TiO<ce:inf loc=\"post\">2</ce:inf>/TiN (Co@NTT), which utilizes doping to regulate the strength of the BIEF is meticulously fabricated. Both experimental and theoretical results confirm the interface charge redistribution induced by the strong BIEF, which not only effectively modulates the EM parameters but also subtly optimizes impedance matching. It exhibits good absorption capability across multiple frequency bands, with a minimum reflection loss of −62.2 dB in the C band and −67.4 dB in the Ku band. This work paves the way for the development of functional materials with tailored EM properties through space charge engineering.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"25 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144341106","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}

{"title":"Fabrication of nanocomposites based on graphene oxide/carbon nanotube for electrochemical sensing of glucose and dopamine","authors":"Wenhao Qian, Ming Xing, Xiaoyu Huang, Yongjun Li, Bingjie Hao","doi":"10.1016/j.jmst.2025.06.008","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.06.008","url":null,"abstract":"The real-time monitoring of key metabolites, notably glucose and dopamine, has emerged as a critical imperative for advancing human healthcare. Biosensors, especially for electrochemical detection, present a cost-effective and practical approach to achieve rapid and efficient molecular detection. This study presented a strategic advancement in electrochemical sensing technology through the rational design of a hybrid nanocomposite as substrate. By integrating multifunctional graphene oxide (GO) nanosheets with carbon nanotubes (CNT), we engineered a platform for the immobilization and stabilization of gold nanoparticles (AuNPs), yielding a highly dispersed and electroactive Au@SH-GO-PEG/CNT nanocomposite. Concretely, in Au@SH-GO-PEG/CNT dispersion, the compatible polymer (PEG) was conjugated on GO sheets to ensure colloidal stability and uniform dispersion, thiol groups were introduced into GO sheets to anchor AuNPs, and CNT was integrated into GO for enhancement of electrochemical activity. In subsequent electrochemical detection of glucose and dopamine, it was informed that GCE/Au@SH-GO-PEG/CNT could serve as a promising substrate for a sensitive and stable electrochemical sensor, on account of systemic CV curves and corresponding amperometric responses. Thus, it is reasonable to anticipate that this rationally designed GO-CNT hybrid nanocomposite can act as an effective platform for stabilizing AuNPs while preserving their inherent properties. The strategic integration of CNT within GO could synergistically amplify the electrochemical activity of the AuNPs/GO system.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144370792","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}

{"title":"Accelerated martensite decomposition in additively manufactured TA15 titanium alloy under thermal cycling","authors":"Meng Wang, Jiaxin Wang, Shufan Xian, Junfeng Zhou, Wei Xu, Jiabao Guo, Qian Wang, Xin Lin, Weidong Huang","doi":"10.1016/j.jmst.2025.04.079","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.079","url":null,"abstract":"Laser powder-bed fusion (L-PBF) enables the fabrication of complex metallic parts at reduced lead time and waste, however, the complex dynamic thermal profiles inherent to the L-PBF process makes it difficult to achieve high mechanical performance by real-time microstructure control during the fabrication of metallic components. In this study, we designed a series of specifically thermal cycling treatments imposed by laser scanning on fully martensitic L-PBF TA15 titanium alloy samples, which not only closely resemble the thermal history experienced by the samples during the L-PBF process, but also could accelerate martensitic decomposition in just a few minutes. Depending on the thermal environment developed during laser scanning, two transformation pathways are identified. These include accelerated direct decomposition of martensite via <em>α</em>′→<em>α</em>+<em>β</em> when thermal cycling largely in the <em>α</em>+<em>β</em> phase field below the <em>β</em> transus, and indirect transformation via <em>α</em>′→<em>β</em>→<em>α</em>+<em>β</em> while thermal cycling with peak temperatures well above the <em>β</em> transus for a prolonged duration and subsequent slow cooling. The accelerated martensite decomposition is proposed to stem from rapid accumulation of <em>β</em>-stabilizers at twin boundaries and the interfaces of <em>α</em>′ martensite laths.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144370794","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}