Acta Metallurgica Sinica-English Letters最新文献

{"title":"Corrosion Behavior of High-Chromium Alloys in Molten LiCl–KCl Eutectic","authors":"Mengmeng Ji,&nbsp;Xin Li,&nbsp;Zihe Liu,&nbsp;Xiaoguang Yang,&nbsp;Xue Zhang,&nbsp;Ying Li","doi":"10.1007/s40195-024-01742-9","DOIUrl":"10.1007/s40195-024-01742-9","url":null,"abstract":"<div><p>Pyrochemical reprocessing utilizing a molten LiCl–KCl eutectic medium is regarded as the most promising approach for recovering uranium and transuranic elements from spent metallic nuclear fuels. However, the harsh corrosiveness of molten chloride poses a significant challenge to the durability of structural materials. Herein, we report the corrosion behavior of 304 SS, 316H SS and Inconel 800H in LiCl–KCl eutectic salt at 550 °C for 100 h under an argon atmosphere. Experimental results indicate that all three materials can form a rather continuous Cr₂O₃-based scale through oxidation reaction at the beginning, but only the scale developed on 800H maintains excellent protection against corrosion throughout the entire exposure period. In contrast, both 304 SS and 316H SS experience considerable active dissolution on the bare substrate under a detached scale. We suggest that the primary reasons for the outstanding resistance of 800H to molten salt corrosion are the high concentration of noble Ni in the system, which lowers the inclination for active dissolution, and the beneficial addition of Al, which accelerates the formation of a less defective Cr₂O₃-based scale. Our work offers an in-depth understanding on the corrosion performance of high-Cr alloys in molten chloride, insights critical for the selection and subsequent development of structural materials for pyrochemical reprocessing applications.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 10","pages":"1809 - 1818"},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141685566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing the Interplay of Sintering Conditions on Microstructure and Hardness in Indirect Additive Manufacturing of 17-4PH Stainless Steel","authors":"Erika Lannunziata,&nbsp;Mohammad Hossein Mosallanejad,&nbsp;Manuela Galati,&nbsp;Gabriele Piscopo,&nbsp;Abdollah Saboori","doi":"10.1007/s40195-024-01745-6","DOIUrl":"10.1007/s40195-024-01745-6","url":null,"abstract":"<div><p>Indirect additive manufacturing (AM) methods have recently attracted attention from researchers thanks to their great potential for cheap, straightforward, and small-scale production of metallic components. Atomic diffusion additive manufacturing (ADAM), a variant of indirect AM methods, is a layer-wise indirect AM process recently developed based on fused deposition modeling and metal injection molding. However, there is still limited knowledge of the process conditions and material properties fabricated through this process, where sintering plays a crucial role in the final consolidation of parts. Therefore, this research, for the first time, systematically investigates the impact of various sintering conditions on the shrinkage, relative density, microstructure, and hardness of the 17-4PH ADAM samples. For this reason, as-washed samples were sintered under different time–temperature combinations. The sample density was evaluated using Archimedes, computed tomography, and image analysis methods. The outcomes revealed that sintering variables significantly impacted the density of brown 17-4PH Stainless Steel samples. The results indicated more than 99% relative densities, higher than the value reported by Markforged Inc. (~ 96%). Based on parallel porosities observed in the computed tomography results, it can be suggested that by modifying the infill pattern during printing, it would be possible to increase the final relative density. The microhardness of the sintered samples in this study was higher than that of the standard sample provided by Markforged Inc. Sintering at 1330 °C for 4 h increased the density of the printed sample without compromising its mechanical properties. According to X-ray diffraction analysis, the standard sample provided by Markforged Inc. and “1330 °C—4 h” one had similar stable phases, although copper-rich intermetallics were more abundant in the microstructure of reference samples. This study is expected to facilitate the adoption of indirect metal AM methods by different sectors, thanks to the high achievable relative densities reported here.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 9","pages":"1611 - 1620"},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141686400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Al2O3 on the Mechanical Properties of (B4C + Al2O3)/Al Neutron Absorbing Materials","authors":"J. X. Cai,&nbsp;B. M. Shi,&nbsp;N. Li,&nbsp;Y. Liu,&nbsp;Z. G. Zhang,&nbsp;Y. N. Zan,&nbsp;Q. Z. Wang,&nbsp;B. L. Xiao,&nbsp;Z. Y. Ma","doi":"10.1007/s40195-024-01711-2","DOIUrl":"10.1007/s40195-024-01711-2","url":null,"abstract":"<div><p>B₄C/Al composites are widely utilized as neutron absorbing materials for the storage and transportation of spent nuclear fuel. In order to improve the high-temperature mechanical properties of B₄C/Al composites, in-situ nano-Al₂O₃ was introduced utilizing oxide on Al powder surface. In this study, the Al₂O₃ content was adjusted by utilizing spheroid Al powder with varying diameters, thereby investigating the impact of Al₂O₃ content on the tensile properties of (B₄C + Al₂O₃)/Al composites. It was found that the pinning effect of Al₂O₃ on the grain boundaries could hinder the recovery of dislocations and lead to dislocation accumulation at high temperature. As the result, with the increase in Al₂O₃ content and the decrease in grain size, the high-temperature strength of the composites increased significantly. The finest Al powder used in this investigation had a diameter of 1.4 μm, whereas the resultant composite exhibited a maximum strength of 251 MPa at room temperature and 133 MPa at 350 °C, surpassing that of traditional B₄C/Al composites.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 8","pages":"1411 - 1420"},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141687852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Rolling Temperature on the Mechanical Properties and Corrosion Behavior of Mg–Zn–Y–Nd Alloy Thin Sheets","authors":"Zhibin Liu,&nbsp;Guangya Zhu,&nbsp;Wenkai Li,&nbsp;Di Mei,&nbsp;Peihua Du,&nbsp;Yufeng Sun,&nbsp;Shijie Zhu,&nbsp;Shaokang Guan","doi":"10.1007/s40195-024-01740-x","DOIUrl":"10.1007/s40195-024-01740-x","url":null,"abstract":"<div><p>There is a growing demand for degradable membranes with sufficient mechanical properties to guide tissue regeneration in dental surgery. In the present work, a two-stage rolling process in which the first rolling stage (FRS) adopted a reduction rate of 30% for six passes at various temperatures, while the second rolling stage was rolling at 200 °C for two passes, was employed to prepare a 150 μm-grade Mg–2.0Zn–0.5Y–0.5Nd (ZE21B) Mg alloy sheets for guided tissue regeneration membrane. The microstructure of the thin sheets was gradually refined with increasing rolling passes, and the thin sheets that were rolled at different FRS temperatures exhibit an ellipse texture. The thin sheets rolled at 350 °C for FRS show low elongation due to premature fracture caused by the coarse second phase particles. On account of uniform and fine grains, the thin sheets rolled at 400 °C for the FRS have proper mechanical properties: yield strength of 214.6 ± 8.5 MPa, ultimate tensile strength (UTS) of 246.8 ± 10.3 MPa and elongation to failure of 28.3 ± 1.2%. When rolling at 450 °C for FRS, proper ductility of the thin sheets has been acquired, followed by a decline in UTS since a bimodal structure with fine and coarse grain was developed. Immersion tests demonstrated the FRS temperature had no significant effect on the corrosion behavior and corrosion rate of Mg alloy sheets after 7 days’ immersion in artificial saliva solution. This research has great significance for the production of degradable Mg sheets for guided tissue regeneration membrane.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 10","pages":"1721 - 1734"},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141688131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase Selection and Microstructure Evolution Dependance on Composition for Zr–Fe Eutectic Alloys","authors":"Dong-Dong Zuo,&nbsp;Jian Chang,&nbsp;Hai-Peng Wang","doi":"10.1007/s40195-024-01736-7","DOIUrl":"10.1007/s40195-024-01736-7","url":null,"abstract":"<div><p>The knowledge of the phase selection and microstructure evolution of Zr–Fe eutectic alloys is still poorly understood. The presumed eutectic alloy with a nominal composition of Zr_76.0Fe_24.0 was discovered to contain a significant proportion of <i>α</i>-Zr dendrites. Hereby, phase selection and microstructure evolution dependance on composition for Zr–Fe eutectic alloys was experimentally determined by using differential scanning calorimetry (DSC) and meticulous electron microscopes. Eight alloys, spanning the composition range of 73.5–74.7% Zr, were examined to investigate microstructure evolution and non-isothermal crystallization kinetics. Results indicate that in alloys ranging from Zr_73.5Fe_26.5 to Zr_73.9Fe_26.1, the primary FeZr₂ phase demonstrates preferential growth, followed by eutectic microstructure formation during liquid alloy solidification. The volume fraction of FeZr₂ dendrites decreases as the Zr content increases. Conversely, in alloys ranging from Zr_74.0Fe_26.0 to Zr_74.7Fe_25.3, primary <i>β</i>-Zr dendrites preferentially grow, followed by a eutectic reaction in the remaining liquid phase. The content of <i>α</i>-Zr dendrites reduces with decreasing Zr content. As mentioned above, a critical composition range for phase selection is defined as Zr_<i>x</i>Fe_{100.0−<i>x</i>} (73.9 &lt; <i>x</i> &lt; 74.0).</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 10","pages":"1689 - 1702"},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141685079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Effect of Ca Micro‑Alloying on the Microstructure and Anti‑Corrosion Property of Mg0.5Zn0.2Ge Alloy","authors":"Bishan Cheng,&nbsp;Depeng Li,&nbsp;Baikang Xing,&nbsp;Ruiqing Hou,&nbsp;Pingli Jiang,&nbsp;Shijie Zhu,&nbsp;Shaokang Guan","doi":"10.1007/s40195-024-01741-w","DOIUrl":"10.1007/s40195-024-01741-w","url":null,"abstract":"","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 12","pages":"2170 - 2170"},"PeriodicalIF":2.9,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and DFT Investigations of AlNbTiVZr High Entropy Alloys with Excellent Mechanical Properties","authors":"Hongwei Yan,&nbsp;Yong’an Zhang,&nbsp;Wei Xiao,&nbsp;Boyu Xue,&nbsp;Rui Liu,&nbsp;Xiwu Li,&nbsp;Zhihui Li,&nbsp;Baiqing Xiong","doi":"10.1007/s40195-024-01716-x","DOIUrl":"10.1007/s40195-024-01716-x","url":null,"abstract":"<div><p>This study investigated the microstructure and mechanical properties of AlNbTiVZr series high-entropy alloys (HEAs) through both experimental studies and density functional theory calculations. Significant improvements in the microstructures and mechanical properties were achieved for the AlNbTiVZr series HEAs by meticulously adjusting the alloy composition and employing homogenization heat treatment. Notably, the specimen designated as Al_0.5NbTiVZr_0.5 demonstrated excellent mechanical properties including a compressive yield strength of 1162 MPa and a compressive strength of 1783 MPa. After homogenization heat treatment at 1000 °C for 24 h, the Al_0.5NbTiVZr_0.5 alloy exhibits brittle-to-ductile transition. Further atomic-scale theoretical simulations reveal that the decrease of Al content intrinsically enhances the ductility of the alloys, thereby indicating that the mechanical properties of the AlNbTiVZr series HEAs were significantly influenced by the chemical composition. Additionally, specific atomic pair formations were observed to adversely affect the microstructure of the AlNbTiVZr series HEAs, particularly in terms of ductility. These findings provide valuable insights for the design and optimization of light weight HEAs, emphasizing the synergistic adjustment of alloy composition and heat treatment processes to achieve a balance between the strength and ductility.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 9","pages":"1480 - 1490"},"PeriodicalIF":2.9,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomistic Insights into the Irradiation Resistance of Co-Free High Entropy Alloy FeMnNiCr","authors":"Chunhui Wang,&nbsp;Lei Guo,&nbsp;Rui Li,&nbsp;Qing Peng","doi":"10.1007/s40195-024-01738-5","DOIUrl":"10.1007/s40195-024-01738-5","url":null,"abstract":"<div><p>We have investigated the displacement cascade irradiation resistance behavior of a cobalt-free high entropy alloy FeMnNiCr using molecular dynamics simulations. The results show that defects in FeMnNiCr form in small clusters, and their migration is significantly inhibited, leading to a higher defect recombination rate and a lower number of residual defects compared to Ni. Additionally, FeMnNiCr exhibits a longer thermal peak life and lower thermal conductivity compared to Ni, providing a longer time for defect migration and combining. The migration of defect clusters in FeMnNiCr displays three-dimensional properties, attributed to its high chemical disorder. After prolonged irradiation, defects in FeMnNiCr stabilize as small clusters, whereas point defects in Ni tend to form large defect clusters and evolve into dislocations. Considering the feature of absence of the element cobalt, our results imply that FeMnNiCr has great potential in application in nuclear energies.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 10","pages":"1657 - 1666"},"PeriodicalIF":2.9,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Temperature Fatigue Behavior of Inertia Friction Welded Joints of GH4065A Ni-Based Superalloy","authors":"Xiaoguang Li,&nbsp;Jiatao Liu,&nbsp;Qing Liu,&nbsp;Chunbo Zhang,&nbsp;Hang Liang,&nbsp;Lei Cui,&nbsp;Yongchang Liu","doi":"10.1007/s40195-024-01739-4","DOIUrl":"10.1007/s40195-024-01739-4","url":null,"abstract":"<div><p>In this work, the novel Ni-based superalloy GH4065A inertia friction welding (IFW) joints were subjected to the post-welding heat treatments (PWHT) at 730 ℃ for 5 h or 760 ℃ for 5 h, and the differences in microstructure characteristics, local mechanical properties, and fatigue failure life were focused. Furthermore, based on the high-temperature low-cycle fatigue testing and characterization results, the correlation between the microstructure characteristics and low-cycle fatigue damage behavior was systematically analyzed. It was found that there were smaller grains in the thermo-mechanically affected zone (TMAZ) than in the weld zone and heat-affected zone (HAZ), and the boundary region between TMAZ and HAZ was the fatigue failure position of IFW joints under the high-temperature low-cycle fatigue loading. The fatigue testing results showed that the high-temperature fatigue performance for GH4065A IFW joints degenerated with the increase in PWHT temperature. There existed cyclic softening and inhomogeneous fatigue damage in an IFW joint, which was more significant under the 760 ℃ 5 h PWHT condition. Microstructurally, dislocation tangles and cells formed in the boundary region between TMAZ and HAZ under the fatigue loading. The difference in grain size after the IFW process and the inhomogeneous <i>γ</i>′ phrase re-precipitation after the PWHT in the boundary region between TMAZ and HAZ resulted in the local inhomogeneous strengthening, corresponding to uneven plastic deformation and fatigue failure behavior under the fatigue loadings.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 11","pages":"1935 - 1946"},"PeriodicalIF":2.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Co and Nb on the Crack of Additive Manufacturing Nickel-Based Superalloys","authors":"Kejie Tan,&nbsp;Jinli Xie,&nbsp;Hailong Qin,&nbsp;Bin Xu,&nbsp;Guichen Hou,&nbsp;Jinguo Li,&nbsp;Zhongnan Bi,&nbsp;Ji Zhang","doi":"10.1007/s40195-024-01726-9","DOIUrl":"10.1007/s40195-024-01726-9","url":null,"abstract":"<div><p>Increasing the print quality is the critical requirement for the additive manufactured complex part of aero-engines of nickel-based superalloys. A study of the effects of Co and Nb on the crack is performed focusing on the selective laser melting (SLM) nickel-based superalloy. In this paper, the solvus temperature of <i>γ</i>', crack characteristics, microstructure, thermal expansion, and mechanical properties of SLM nickel-based superalloy are investigated by varying the content of Co and Nb. The alloy with 15Co/0Nb shows the highest comprehensive quality. Nb increases the crack risk and thermal deformation, and then Co accelerates the stress release. Therefore, Co is an extremely important alloying element for improving the quality of SLM nickel-based superalloy. Finally, the crack growth kinetics and the strain difference are discussed to reveal the SLM crack regular that is affected by time or temperature. The analysis work on the effect of alloying elements can obtain an effective foundational theory to guide the composition optimization of SLM nickel-based superalloys.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 9","pages":"1601 - 1610"},"PeriodicalIF":2.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}