Acta Materialia最新文献

{"title":"Defect structures and room-temperature deformation of single crystals of the mu-phase compound Fe7Ta6 investigated by micropillar compression","authors":"Zhenghao Chen,&nbsp;Tatsuro Kishi,&nbsp;Shu Han,&nbsp;Kyosuke Kishida,&nbsp;Haruyuki Inui","doi":"10.1016/j.actamat.2025.121552","DOIUrl":"10.1016/j.actamat.2025.121552","url":null,"abstract":"<div><div>The deformation behavior of single crystals of the mu-phase compound Fe₇Ta₆ has been investigated by micropillar compression at room temperature as a function of crystal orientation and specimen size. Grown-in planar defects have also been investigated to avoid the confusion of grown-in defects and those introduced by deformation. (0001)&lt;2<span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span><span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span>0&gt; (basal <strong><em>a</em></strong>) slip is identified to be the dominant slip system operative at room temperature. The CRSS for basal <strong><em>a</em></strong> slip is as high as 1.24 GPa. Direct observation of the dislocation core indicates that basal <strong><em>a</em></strong> slip in Fe₇Ta₆ of the mu-phase occurs by a synchroshear mechanism exclusively within the triple layers of the MgCu₂ (Laves-phase) block layer, so that one form of the MgCu₂ block layer is transformed into another (twin-related) by the passage of the leading synchro-Shockley partial dislocation. In addition to planar faults on the (0001) basal plane formed when a different form of the MgCu₂ block layer is incorporated in the [0001] stacking sequence (stacking faults and twins) and when a block layer either of the MgCu₂ or Zr₄Al₃ type is inserted consecutively or deleted, planar faults on {1<span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span>02} and {1<span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span>0<span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span>} pyramidal planes are identified. These {1<span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span>02} and {1<span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span>0<span><math><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover></math></span>} pyramidal faults are found, for the first time, to be introduced to accommodate lattice incompatibility generated by the introduction of an intergrowth fault on the (0001) basal plane.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121552"},"PeriodicalIF":9.3,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145067916","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":"Giant tuning on de/hydrogenation thermodynamics by constructing internal strain field in AB2 type hydrogen storage alloys","authors":"Yuchen Mao ,&nbsp;Mengjiao Han ,&nbsp;Ziming Li ,&nbsp;Liangjun Huang ,&nbsp;Wei Zhang ,&nbsp;Hui Wang ,&nbsp;Liuzhang Ouyang ,&nbsp;Xiuliang Ma ,&nbsp;Min Zhu","doi":"10.1016/j.actamat.2025.121551","DOIUrl":"10.1016/j.actamat.2025.121551","url":null,"abstract":"<div><div>Suitable dehydrogenation and hydrogenation (de/hydrogenation) thermodynamics, with enthalpy change (ΔH) in the range of 30–40 kJ/mol H₂, are necessary for operating hydrogen storage alloys (HSAs) at ambient temperature. Unfortunately, this is not satisfied in many HSAs, although many methods, such as alloying, nanosizing and constructing destabilization reactions, have been tried to tune the thermodynamics. In this work, controllable internal strain is induced in AB₂ type Y-Zr-Fe-Al alloys by careful control of dual-phase structure in which ZrFe₂ secondary phase with high de/hydrogenation equilibrium H₂ pressure (P_eq) can coherently precipitate in YFe₂ matrix phase with low P_eq. Thus, an internal strain field is constructed due to the interface mismatch and the asynchronous volumetric variation of the two phases during de/hydrogenation, and a giant change in de/hydrogenation thermodynamics is subsequently achieved. The dehydrogenation P_eq of the alloy with coherent dual-phase structure can be ∼166 times higher than that with single-phase structure, corresponding to a change of dehydrogenation ΔH from 63.7 kJ/mol H₂ to 44.8 kJ/mol H₂. Based on that, the contribution of internal strain is incorporated into the Van’t Hoff equation to determine de/hydrogenation P_eq by inducing a strain factor. The present work demonstrates that internal strain induced by designed precipitation, can vastly tune the de/hydrogenation thermodynamics and is of great significance for the application of HSAs.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121551"},"PeriodicalIF":9.3,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145067913","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":"Boosting Zn2+ intercalation via high-entropy doping and dynamic electron reservoirs for high-performance Zn-Mn batteries","authors":"Kaisheng Sun ,&nbsp;Yanlei Geng ,&nbsp;Liang Li ,&nbsp;Shengen Gong ,&nbsp;Zhiqi Chen ,&nbsp;Fangfei Li ,&nbsp;Xiaoteng Jia ,&nbsp;Caiyun Wang ,&nbsp;Danming Chao","doi":"10.1016/j.actamat.2025.121549","DOIUrl":"10.1016/j.actamat.2025.121549","url":null,"abstract":"<div><div>Among manganese oxides, MnO with the highest theoretical capacity holds promise for ultra-high energy density Zn-ion batteries but is restricted ion/electron migration. Here, we synthesized a carbon-coated, high-entropy-doped MnO and intermetallic compounds (IMC) heterostructure (HE-MnO/IMC) by integrating high-entropy doping and heterojunction strategies to address intrinsic challenges. Carbon coating with abundant <em>C</em> = <em>O</em> bonds externally provides a rapid transport pathway for Zn²⁺. High-entropy doped MnO internally optimizes Zn²⁺ migration via lattice distortion, while IMC optimizes electron transfer through interfacial effects and maintains charge balance as a dynamic electron reservoir. This integrated design strategy of complex structures and synergistic effects facilitates efficient ion and electron transport, achieving excellent rate performance (136.4 mAh g^-1 at 5.0 A g^-1) and stability (90.9% retention after 10,000 cycles). This work provides a new paradigm for the precise regulation of the reactive kinetic behaviour of functional materials.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121549"},"PeriodicalIF":9.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145067914","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":"Sequentially-activated multiple deformation mechanisms enable a hierarchically duplex titanium alloy with high strength-ductility synergy","authors":"Jiakun Yang,&nbsp;Jinyu Zhang,&nbsp;Gang Liu,&nbsp;Jun Sun","doi":"10.1016/j.actamat.2025.121546","DOIUrl":"10.1016/j.actamat.2025.121546","url":null,"abstract":"<div><div>The HCP α-precipitates in duplex titanium (Ti) alloys are quite important to their mechanical properties in terms of accommodating plastic deformation for large ductility on the one hand and hindering dislocation motion for high strength by α-precipitate/β-matrix interfaces on the other hand. However, the intrinsic limited slip systems of low symmetric α-precipitates lead to progressive deformation localization even cracking due to high stress concentrations, becoming the origin of the strength-ductility conflict in Ti alloys. Here, a tri-modal Ti-4.5Al-4.5Mo-7V-1.5Cr-1.5Zr (wt.%) alloy as a model is decorated by hierarchically multi-scaled and multi-polymorphic α precipitates to introduce multiple plasticity mechanisms for high strength-ductility synergy. The sequentially-activated plasticity mechanisms (SAPMs) dominantly involve prismatic 〈<em>a</em>〉 and pyramidal 〈<em>c</em> <em>+</em> <em>a</em>〉 dislocation slip and cross-slip in globular micron-α_g, the P-type HCP-to-FCC transformation and stacking faults/nanotwins in rod-like submicron-α_r, and prismatic 〈<em>a</em>〉 dislocation slip transfer in secondary nano-α_s. The SAPMs in the α precipitates are strongly size-dependent and explained in terms of the critical resolved shear stress (CRSS). The contribution of multi-polymorphic α-precipitates to the yield strength is quantified with their distinguished strengthening capabilities of α-precipitates in multi-scales. The present hierarchical Ti alloy with the tri-modal microstructure achieves a good combination of yield/ultimate tensile strength of 1550/1614 MPa and ductility of ∼8.7 %.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121546"},"PeriodicalIF":9.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145067915","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":"Design biomedical β-Ti alloys with exceptional strength-ductility balance via domain knowledge-based machine learning","authors":"Shiyu He ,&nbsp;Fei Xiao ,&nbsp;Leiji Li ,&nbsp;Yang Liu ,&nbsp;Yi Zeng ,&nbsp;Mingyu Gong ,&nbsp;Ying Zhou ,&nbsp;Jing Han ,&nbsp;Jiannan Liu ,&nbsp;Xuejun Jin","doi":"10.1016/j.actamat.2025.121550","DOIUrl":"10.1016/j.actamat.2025.121550","url":null,"abstract":"<div><div>The optimization of strength and ductility in biomedical titanium alloys is critical for improving the performance of biomedical implants. This study presents a novel domain knowledge-based machine learning approach to design a Ti-15Zr-15Nb-1Fe biomedical β-Ti alloy, achieving an exceptional balance of 35 % elongation and 700 MPa yield strength. The phase constitution and microstructure were characterized using X-ray diffractometry, electron backscatter diffraction, and transmission electron microscopy. The study also explores the internal mechanisms of the machine learning model and investigates the relationship between slip systems and kink band formation. Results reveal that the evolution and interaction of multi-slip/kinking mechanisms promote uniform deformation and dynamically enhance the strain-hardening rate, leading to a synergistic improvement in strength and ductility. These findings underscore the potential of machine learning in accelerating the development of advanced biomaterials and provide mechanistic insights into deformation behavior, offering a pathway for designing next-generation biomedical implants.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121550"},"PeriodicalIF":9.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059392","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":"Self-assembled three-dimensional nanosphere Sn-SnO2/Li4Ti5O12 composite thin film anode materials and their application in quasi-solid-state thin film batteries","authors":"Lei Liu ,&nbsp;Zejian Zheng ,&nbsp;Yazi Liu ,&nbsp;Yongsong Liu ,&nbsp;Zhanfei Wu ,&nbsp;Cuiping Jia ,&nbsp;Xinai Ren ,&nbsp;Yaohui Liang ,&nbsp;Jingrui Kang ,&nbsp;Yong Sun ,&nbsp;Linxia Wang","doi":"10.1016/j.actamat.2025.121548","DOIUrl":"10.1016/j.actamat.2025.121548","url":null,"abstract":"<div><div>Three-dimensional Sn-SnO₂/Li₄Ti₅O₁₂ composite thin film anode materials, featuring self-assembled Sn-SnO₂ nanospheres, are effectively fabricated through radio-frequency magnetron sputtering technology followed by a rapid annealing treatment. X-ray diffraction analysis shows that the film predominantly consists of polycrystalline Li₄Ti₅O₁₂, along with minor monocrystalline Sn and SnO₂. Scanning electron microscopy results reveal that post-annealed films exhibit nanospherical particles embedded within the composite surface. Electrochemical impedance spectroscopy demonstrates a charge conductivity of 1.41 × 10^-6 S·cm^-1 for the composite film under optimized conditions (annealing temperature: 850 °C, SnO₂/Li₄Ti₅O₁₂ molar ratio: 0.5). Galvanostatic intermittent titration technique analysis reveals a dynamic Li-ion diffusion coefficient ranging from 2.09 × 10^-13 to 1.23 × 10^-11 cm²·s^-1 in a half-cell configuration. In situ XRD characterization highlights excellent structural reversibility and stability of the film during charge/discharge cycles. The composite film delivers initial discharge specific capacities of 151.11 mAh·g^-1 at 0.1 C and 120.16 mAh·g^-1 at 0.5 C, with capacity retention rates of 94.18% and 85.17%, respectively, after 200 cycles. Subsequently, Li_1.3Al_0.3Ti_1.7(PO₄)₃ and LiFePO₄ are employed to assemble a quasi-solid-state battery, achieving initial specific discharge capacities of 115.29 mAh·g^-1 (0.1 C) and 86.55 mAh·g^-1 (0.5 C), with 85.94% and 80.37% capacity after 200 cycles. This work provides valuable insights for developing high-performance 3D Li-ion thin-film anode materials.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121548"},"PeriodicalIF":9.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059391","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":"Anomalous upper critical field in UNbTiVZr, a new high entropy alloy superconductor containing uranium","authors":"Wojciech Nowak ,&nbsp;Bartosz Rusin ,&nbsp;Daniel Gnida ,&nbsp;Adam Pikul ,&nbsp;Rafał Idczak","doi":"10.1016/j.actamat.2025.121519","DOIUrl":"10.1016/j.actamat.2025.121519","url":null,"abstract":"<div><div>The paper describes the physical and structural properties of UNbTiVZr, a novel equimolar type-A high-entropy alloy (HEA) superconductor containing uranium. To our knowledge, only one prior study has reported a non-equimolar uranium-containing HEA, making UNbTiVZr the first equimolar system of this kind. The alloy was characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, electrical resistivity, magnetization and specific heat measurements. It has been determined that the alloy exhibits type II superconductivity, with a critical temperature of about 2 K and an anomalously high upper critical field, for the description of which the Werthamer–Helfand–Hohenber model, modified by the diffusivity distribution, was used.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121519"},"PeriodicalIF":9.3,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056928","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":"Enhancing thermal stability and crack resistance in Co-Cr-Ti superalloy films through Mo doping: A combinatorial study","authors":"Chan Kim ,&nbsp;Taeyeop Kim ,&nbsp;Kelvin Xie ,&nbsp;Dongwoo Lee","doi":"10.1016/j.actamat.2025.121547","DOIUrl":"10.1016/j.actamat.2025.121547","url":null,"abstract":"<div><div>In this study, we investigated the effects of 1.5 at.% Mo doping on the microstructure, hardness, and electrical resistivity of Co_51∼86Cr_9∼41Ti_2∼11 thin-film alloys. Two batches of thin films were deposited, one at room temperature and the other at 600 °C, followed by annealing at 650 °C for 4 h to evaluate property changes after heat treatment. Without Mo doping, only lower Co content (less than ∼70 %) alloys exhibited significantly reduced annealing-induced cracking in both batches. With Mo doping, crack formation was found to be reduced or suppressed across all deposition conditions and compositions. Moreover, for room-temperature-deposited thin-film alloys with lower Co content, Mo doping facilitated the formation of an amorphous phase, which transformed into an amorphous-nanocrystalline composite upon annealing, achieving an exceptional hardness of 17.9 GPa. In films deposited at 600 °C with higher Co content (greater than ∼70 %), Mo doping stabilized nanolamellar structured precipitates, which helped mitigate thermal stress concentration by distributing it throughout the alloy matrix and eliminating observable cracks. These findings highlight the dual role of Mo in enhancing the mechanical properties and thermal stability of Co-Cr-Ti thin-film alloys, offering valuable insights for the design of high-performance superalloys.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121547"},"PeriodicalIF":9.3,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056937","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":"Alloying effects on spinodal decomposition induced nano-sized X-N clustering during low-temperature nitriding of austenitic Fe-35Ni-X alloys","authors":"Yulin Xie ,&nbsp;Goro Miyamoto ,&nbsp;Yuichiro Hayasaka ,&nbsp;Tadashi Furuhara","doi":"10.1016/j.actamat.2025.121543","DOIUrl":"10.1016/j.actamat.2025.121543","url":null,"abstract":"<div><div>The addition of Cr is vital for the formation of the expanded austenite (γ_N) supersaturated by nitrogen (N) during low-temperature nitriding of austenitic steels. Cr-N clustering in γ_N promoted by Cr-N attractive interaction was recently reported for low-temperature nitrided Fe-35Ni-Cr alloys. However, the effects of other elements having different X-N interactions remain unclear. In the present work, the effect of nitride-forming element X (X = Al, Mo, Mn, Cr, V) addition on the low-temperature nitriding behavior and nanostructure evolution of γ_N is systematically investigated for austenitic Fe-35Ni-10X (at%) alloys. The addition of X promotes surface N absorption, lattice expansion and thus hardening of γ_N in the order of Mn&lt;Al&lt;Mo&lt;Cr&lt;V. Transmission electron microscopy (TEM) and three-dimensional atom probe (3DAP) analyses have revealed the formation of nano-scale non-equilibrium X-N clusters in γ_N as spinodally modulated structures and γ′-Fe₄N type long-range ordering (LRO) of N near the surface for the Mo, Cr, and V-added alloys. However, the γ_N formed in Al or Mn-added alloys shows no X-N clustering or LRO of N. The chemical driving force, strain energy and modulation wavelength for coherent spinodal decomposition were calculated thermodynamically under multi-compositional concentration fluctuations. The driving force for spinodal decomposition increases in the order of X-N attractive interaction, namely Mn&lt;Mo&lt;Cr&lt;V. The calculations agree with the nanostructures observed where the alloy with stronger X-N attractive interaction showed a smaller modulation wavelength.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121543"},"PeriodicalIF":9.3,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056938","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":"Stable long-term elastocaloric effect in Si doped Ni-Mn-Ti polycrystalline alloys with a textured dual-phase microstructure","authors":"Guoyao Zhang ,&nbsp;Yueping Wang ,&nbsp;Cong Liu ,&nbsp;Daoyong Cong ,&nbsp;Yafei Kuang ,&nbsp;Jiajing Yang ,&nbsp;Bo Yang ,&nbsp;Liang Zuo ,&nbsp;Zongbin Li","doi":"10.1016/j.actamat.2025.121541","DOIUrl":"10.1016/j.actamat.2025.121541","url":null,"abstract":"<div><div>Heusler-type Ni-Mn-Ti shape memory alloys have emerged as promising candidates for elastocaloric cooling applications owing to their colossal elastocaloric effect. However, simultaneously achieving high cooling capacity and long fatigue life in polycrystalline alloys remains challenging because of their inherent brittleness. In this study, we demonstrate a significant enhancement in the long-term elastocaloric performance of Ni-Mn-Ti polycrystalline alloys by developing a textured dual-phase microstructure. Through the combination of non-transforming Mn₂Ti precipitates induced by Si substitution for Ni and &lt;001&gt;<em>_A</em> oriented austenite matrix formed by directional solidification, exceptional cyclability over one million compressive loading-unloading cycles is achieved in a directionally solidified Ni₄₆Mn_32.5Ti_17.5Si₄ alloy, representing an improvement in the fatigue life of existing Heusler-type elastocaloric alloys by two or three orders of magnitude. Notably, even after this long-term cycling, a substantial adiabatic temperature variation of –12.7 K can still be obtained upon unloading from a moderate stress of 566 MPa. Such remarkable elastocaloric properties arise from the synergy of precipitate hardening and microstructure texturing, which not only significantly improves the fatigue life by enhancing resistance to dislocation motion and reducing stress hysteresis, but also enables a pronounced elastocaloric response under low driving stress.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"301 ","pages":"Article 121541"},"PeriodicalIF":9.3,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043258","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}