Journal of Materials Research and Technology-Jmr&t最新文献_第3页

The phase structure, hardness, and wear properties of the Cu–Cr–Zr–Nb alloy under different aging states

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.073

引用次数: 0

Crack inhibition and crystallographic texture control in an additively manufactured IN738LC Ni-based superalloy

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.101

{"title":"Crack inhibition and crystallographic texture control in an additively manufactured IN738LC Ni-based superalloy","authors":"","doi":"10.1016/j.jmrt.2024.09.101","DOIUrl":"10.1016/j.jmrt.2024.09.101","url":null,"abstract":"<div><p>The additive manufacturing of directionally solidified Ni-based superalloys remains a significant challenge due to the formation of stray equiaxed grains and their high susceptibility to cracking, particularly for high-volume γ´-type Ni-based superalloys. In this study, a novel strategy based on temperature field management was proposed to prevent hot cracking and control crystallographic texture during laser powder bed fusion (LPBF) of IN738LC superalloy. The influence of laser parameters and substrate preheating on crack density, melt pool morphology, and texture of IN738LC superalloy was investigated. The fluid dynamics and thermal behavior of melt pool was simulated using the discrete element model (DEM) and volume of fluid (VOF) method. The processing window for achieving defect-free IN738LC samples was established and was found to be highly affected by substrate preheating. Substrate preheating at 350 °C resulted in expanded processing window, with the volume energy density ranging from 42.9 to 62.5 J/mm³ without substrate preheating to 40–75 J/mm³. The enlarged processing window was achieved by reducing cracking susceptibility due to the reduced temperature gradient and cooling rate. A unique crystallographic lamellar microstructure (CLM), comprising a <110>-oriented major layer and <100>-oriented sub-layer along the building direction, was successfully achieved in the LPBF-processed IN738LC superalloy. The solidification conditions for obtaining such a CLM were discussed on the aspects of temperature gradient and solidification rate within the melt pool. This work provides new insights and methods for preparing crack-free γ´-Ni-based superalloys with specific textures, which is favorable for improving the high-temperature properties.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021069/pdfft?md5=912d7953ef1f79525b8a1e969cca780d&pid=1-s2.0-S2238785424021069-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing fatigue resistance of high-entropy alloy by designing a hierarchically heterogeneous microstructure

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.091

{"title":"Enhancing fatigue resistance of high-entropy alloy by designing a hierarchically heterogeneous microstructure","authors":"","doi":"10.1016/j.jmrt.2024.09.091","DOIUrl":"10.1016/j.jmrt.2024.09.091","url":null,"abstract":"<div><p>Fatigue property is an important index for novel high-entropy alloys (HEAs) before their engineering applications. Here we engineer a Al<sub>0·3</sub>CoCrFeNi HEA with hierarchically heterogeneous microstructure by cold rolling and annealing treatment, which includes heterogeneous grains, annealing and deformation twins, residual dislocations and B2 precipitates with different morphologies, sizes and distributions. Stress-life (<em>S–N)</em> tests and characterization techniques including scanning electron microscope (SEM) and transmission electron microscope (TEM) were carried out to investigate fatigue properties as well as corresponding mechanisms. It is found that this HEA possesses good strength-ductility combination (i.e., yield strength of ∼870 MPa, ultimate tensile strength of ∼1060 MPa and ductility of ∼26 %) and fatigue resistance with fatigue ratio of ∼0.46 under stress ratio of −1. This fatigue ratio exceeds those of most reported HEAs. High strength renders the fatigue deformation mainly occurs in deformation twin regions decorated with B2 precipitates. Surface damage morphologies indicate that fatigue cracks initiate from persistent slip band-like shear bands. In addition, microstructural hierarchy results in the deflected fatigue crack propagation path, which is beneficial for the enhancement of fatigue resistance. Present results offer the guidance on future design for high fatigue-resistant HEAs by manipulating heterogeneous microstructure.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020970/pdfft?md5=69c3aad10f28d9df9dce2f3f0765cc41&pid=1-s2.0-S2238785424020970-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the plasticity improvement mechanism and grain refinement of AZ80 Mg alloy under cryogenic multi-directional forging 低温多向锻造条件下 AZ80 镁合金塑性改善机理及晶粒细化研究

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.096

{"title":"Study on the plasticity improvement mechanism and grain refinement of AZ80 Mg alloy under cryogenic multi-directional forging","authors":"","doi":"10.1016/j.jmrt.2024.09.096","DOIUrl":"10.1016/j.jmrt.2024.09.096","url":null,"abstract":"<div><p>The introduction of twin lamellae and dislocation interaction through Multi-directional forging (MDF) at room temperature (RT) has been reported to significantly improve the mechanical properties of Mg alloys. However, the Mg alloys typically exhibited poor plasticity at RT, making it highly susceptible to cracking. This study further enhanced the deformation capacity of AZ80 Mg alloy by adding a pre-cryogenic step before MDF. Compared to direct MDF at RT, MDF at cryogenic temperature (CT, −196 °C) further increased the alloy's deformation capacity from 0.72 (4P) to 1.08 (6P), with the tensile yield strength (TYS) and ultimate tensile strength (UTS) increasing to ∼420 MPa and ∼512 MPa. The alloy subjected to cryogenic MDF exhibited denser twin lamellae and a higher proportion of {10–12}-{10–12} twin interactions. The more frequent twin interactions under CT inhibited excessive twin growth and further increased the dislocation density of the matrix, facilitating the nucleation of new twins. Additionally, with increasing deformation passes, the texture of the RT specimens became more single, while the CT specimen showed a trend toward texture dispersion. The study elucidated that poor forgeability of the alloy under MDF at RT was hindered by unfavorable texture and limited twin activation. However, this issue was mitigated under CT, where the activation of more atypical twins with low Schmid factors (SFs) significantly enhanced the deformation coordination ability. Furthermore, the activation of atypical twins and extensive twin interactions promoted texture dispersion in CT specimens, which facilitated the activation of various slips/twins and suppressed excessive twinning-induced hardening, thereby improving forgeability.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021033/pdfft?md5=35ad51a50c44e093ad7c13b7c15c2b08&pid=1-s2.0-S2238785424021033-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phase reversion mediated the dual heterogeneity of grain size and dislocation density in an equiatomic CrCoNi medium-entropy alloy

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.080

{"title":"Phase reversion mediated the dual heterogeneity of grain size and dislocation density in an equiatomic CrCoNi medium-entropy alloy","authors":"","doi":"10.1016/j.jmrt.2024.09.080","DOIUrl":"10.1016/j.jmrt.2024.09.080","url":null,"abstract":"<div><p>An ultra-high strain rate (10<sup>4</sup> s<sup>−1</sup>) dynamic plastic deformation treatment at liquid nitrogen temperature (LNT-DPD) followed by annealing is carried out to obtain dual heterogeneity of grain size and dislocation density in an equiatomic CrCoNi medium entropy alloy (MEA). Such extreme loading conditions resulted in extensive phase transformation in this MEA. Subsequent annealing at 650 °C for 1 h further induced reverse phase transformation and partial recrystallization, forming a complex heterogeneous microstructure characterized by nested trimodal grain sizes and partitioned dislocation density. A superior yield strength of ∼800 MPa and a good ductility of ∼40% were simultaneously achieved in this heterogeneous alloy. In order to reveal the effects of grain size and dislocation density distributions on the mechanical property improvements, the underlying deformation mechanisms were systematically discussed. High density of geometrically necessary dislocations (GNDs) would be induced in complex heterogeneous structures during tensile deformation due to strain gradients or partitioning between different regions, which would lead to additional strengthening and work hardening. These results provide a novel approach to overcome the strength-ductility trade-off dilemma for FCC-structured MEAs.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020842/pdfft?md5=c1b777811653e66a6c84b73f4b336854&pid=1-s2.0-S2238785424020842-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reaction mechanisms and mechanical properties of SiCf/SiC composite and GH536 superalloy joints using CoFeNiCrMn high-entropy alloy filler

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.095

{"title":"Reaction mechanisms and mechanical properties of SiCf/SiC composite and GH536 superalloy joints using CoFeNiCrMn high-entropy alloy filler","authors":"","doi":"10.1016/j.jmrt.2024.09.095","DOIUrl":"10.1016/j.jmrt.2024.09.095","url":null,"abstract":"<div><p>To meet the service conditions and strength requirements of turbine stator blades and the inner and outer rings of aero engine casings, CoFeNiCrMn high-entropy alloy filler was used to braze SiC<sub>f</sub>/SiC/GH536 joints. This study investigated the effects of holding time on the joints' microstructure and mechanical properties. Key phases identified in the welded joints include MoNiSi, FCC, and Cr<sub>23</sub>C<sub>6</sub> near the composites, with brittle Ni<sub>3</sub>Si and Fe<sub>2</sub>Si intermetallic compounds forming due to filler diffusion. Optimal brazing parameters were found to be 1220 °C for 30 min with a shear strength of 64.28 MPa. The study also highlighted that increased holding time at the same temperature enhances diffusion at the joint, increasing brittle intermetallic compounds, initially improving shear strength, which then declines. Microstructural and fracture morphology analyses revealed that insufficient insulation time leads to poor welding and stress concentration at pores, causing cracks. Excessive insulation time results in joint fractures due to the brittleness of Ni<sub>3</sub>Si and Fe<sub>2</sub>Si intermetallic. Thus, joint shear strength correlates with welding quality and intermetallic compound distribution.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S223878542402101X/pdfft?md5=6bb16ad2e9a89c2ed4e47ecee64eb04f&pid=1-s2.0-S223878542402101X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on anisotropic hardening of 7075 aluminum alloy based on non-associated flow rules

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.084

{"title":"A study on anisotropic hardening of 7075 aluminum alloy based on non-associated flow rules","authors":"","doi":"10.1016/j.jmrt.2024.09.084","DOIUrl":"10.1016/j.jmrt.2024.09.084","url":null,"abstract":"<div><p>The accurate description of anisotropic plastic deformation is key to accurately predicting the stamping forming of metal sheets. The anisotropic yield criterion, when based on the assumption of isotropic hardening, often leads to significant inaccuracies. To address this issue, this paper observes the anisotropic hardening phenomenon through non-associated flow rules and evaluates the anisotropy of 7075-O aluminum alloy. Through a series of tensile tests, we determined the mechanical properties of 7075-O aluminum alloy in three distinct orientations. To describe the metal hardening behavior, we employed the Swift-Voce hardening criterion. From the hardening curves in three different directions, it was found that AA7075-O exhibits plastic anisotropy. Based on the VUMAT subroutine, finite element simulation of AA7075-O tensile tests was conducted through Abaqus. Compared with the Hill48 model, it was found that the simulated values of the S–Y2009 anisotropic hardening model have a higher degree of agreement with the experimental curves. The S–Y2009 anisotropic hardening model was adopted to predict the earing behavior of AA7075-O during circular cup deep drawing. The root mean square error between the predicted values of the S–Y2009 model and the experimental values was only 0.1795, which is far smaller than that of the Hill48 yield model. Therefore, the SY2009 model has important guiding significance for the stamping forming of metal sheets.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020891/pdfft?md5=475a890f75933e6b950c1cc989322a22&pid=1-s2.0-S2238785424020891-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-angle analysis of Mo on martensite–austenite component and toughness in SCGHAZ of X80 pipeline automatic ring welding 多角度分析 Mo 对 X80 管道自动环焊 SCGHAZ 中马氏体-奥氏体成分和韧性的影响

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-12 DOI: 10.1016/j.jmrt.2024.09.062

{"title":"Multi-angle analysis of Mo on martensite–austenite component and toughness in SCGHAZ of X80 pipeline automatic ring welding","authors":"","doi":"10.1016/j.jmrt.2024.09.062","DOIUrl":"10.1016/j.jmrt.2024.09.062","url":null,"abstract":"<div><p>In order to solve the embrittlement problem of welded joint of pipeline steel, this paper proposes to study the influence of Mo on M-A component of the subcritically reheated coarse-grained HAZ (SCGHAZ), and Mo on bainite transformation. Through the welding thermal simulation experiment, two kinds of X80 pipeline steel with different Mo content were set different secondary thermal cycle peak temperatures to simulate the heat affected zone (HAZ). Samples in the SCGHAZ were selected to observe the microstructure, M-A component, microalloy-element distribution and fracture crack trend, and comprehensively analyze the reasons for the deterioration of impact toughness caused by the changes of Mo content. The results show that the increase of Mo content leads to the formation of twinning martensite, which is one of the reasons for the deterioration of toughness. Mo is enriched at the interface of ferrite and M-A component, reducing the binding energy at the interface, resulting in the desorption of M-A component from the matrix, the formation of pores and becoming the nucleation site of cracks, resulting in the generation of micro-cracks and the decrease of toughness.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020672/pdfft?md5=4e8090ec683cdebffc3c774cdf4b650c&pid=1-s2.0-S2238785424020672-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective laser melting of 2507 duplex stainless steel: Effect of energy density on microstructure and corrosion resistance

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-12 DOI: 10.1016/j.jmrt.2024.09.078

{"title":"Selective laser melting of 2507 duplex stainless steel: Effect of energy density on microstructure and corrosion resistance","authors":"","doi":"10.1016/j.jmrt.2024.09.078","DOIUrl":"10.1016/j.jmrt.2024.09.078","url":null,"abstract":"<div><p>Duplex stainless steel (DSS) is widely used in the marine, petroleum, chemical, automotive, and other fields owing to its excellent mechanical properties and corrosion resistance. However, the research on duplex stainless steel prepared by additive manufacturing is still limited. In this paper, high-density 2507 DSS was successfully prepared by selective laser melting (SLM) additive manufacturing. The effects of energy density on the formability, phase composition, microstructure and corrosion properties of SLM 2507 DSS were investigated. The results showed that with the decrease of the energy density, the density of the specimen increases first and then decreases, and the density achieves 99.18% with the energy density of 190.5 J/mm<sup>3</sup>. The types of phases are not affected by the energy density, i.e., all 2507 DSS samples prepared by SLM showed a ferrite phase. The YOZ (parallel to the building direction) plane of the SLM 2507 DSS samples showed predominantly columnar grains attributed to the high temperature gradient and epitaxial growth characteristics. With the increase of energy density, the average grain size decreases slightly from 16.97 μm to 15.78 μm, the KAM value decreases slightly from 1.15 to 1.05, and the low angle grain boundaries (LAGBs) increase significantly from 68.4% to 74.8%. The SLM 2507 DSS sample exhibited excellent corrosion resistance. The self-corrosion potential of the sample is 136 mV and the self-corrosion current density is 2.066 × 10<sup>−8</sup> A/cm<sup>2</sup> at the maximum density. This investigation provides a new approach for the preparation of super duplex stainless steel, which can provide a theoretical basis and guidance for industrialized application.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020829/pdfft?md5=5f3b2e39914619c4a2fe7de60d556b48&pid=1-s2.0-S2238785424020829-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving strength-ductility synergy of spark plasma sintered (CoCrNi)94Al3Ti3 medium-entropy alloy via post-sintering in-situ precipitation treatment

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-12 DOI: 10.1016/j.jmrt.2024.09.090

{"title":"Achieving strength-ductility synergy of spark plasma sintered (CoCrNi)94Al3Ti3 medium-entropy alloy via post-sintering in-situ precipitation treatment","authors":"","doi":"10.1016/j.jmrt.2024.09.090","DOIUrl":"10.1016/j.jmrt.2024.09.090","url":null,"abstract":"<div><p>The single-phase face-centered cubic medium-entropy alloys (MEAs) normally have coarse grains in as-cast state, which exhibit insufficient strength for engineering applications. Here, a superior tensile strength-ductility synergy in a fine grained (CoCrNi)<sub>94</sub>Al<sub>3</sub>Ti<sub>3</sub> MEA hardened by nanoscale L1<sub>2</sub> precipitates was fabricated by spark plasma sintering (SPS) and post-sintering <em>in</em>-<em>situ</em> precipitation treatment. The SPSed MEAs have a fine grain size of ⁓ 5 μm, and a high number density of L1<sub>2</sub> precipitates form after <em>in</em>-<em>situ</em> annealing within the SPS machine. A high tensile yield strength of 1141 MPa with an adequate elongation to fracture of 25.8% was achieved in (CoCrNi)<sub>94</sub>Al<sub>3</sub>Ti<sub>3</sub> MEA after annealing at 700 °C for 4 h. Electron backscattered diffraction and transmission electron microscopy characterizations indicate that the superior mechanical properties mainly originate from fine grains and the coherent spherical L1<sub>2</sub> precipitates. The dislocation slips and stacking faults prevail in all SPSed MEAs during tensile deformation, while extra Lomer-Cottrell locks are observed in annealed MEAs. The deformation twinning is absent in these precipitation-hardened MEAs with a low stacking fault energy, which may be attributed to the fine grains and numerous nanoscale L1<sub>2</sub> precipitates. This study not only confirms the effectiveness of powder metallurgy when sintering and precipitation are combined <em>in</em>-<em>situ</em> during the SPS cycle, but also provide guidance for the microstructure regulation process and practical applications of SPSed HEAs/MEAs.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020957/pdfft?md5=1400d4fac0127e1432c9ad3dfcdeb977&pid=1-s2.0-S2238785424020957-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0