JOM最新文献

{"title":"A Review on High-Entropy Alloys Coatings Fabricated by Electrodeposition: The Correlation Between Composition, Properties and Processing Parameters","authors":"Olga Nechvoglod,&nbsp;Ahmad Ostovari Moghaddam,&nbsp;Svetlana Pratskova,&nbsp;Svetlana Trofimova,&nbsp;Marina Samodurova,&nbsp;Evgeny Trofimov","doi":"10.1007/s11837-024-07122-z","DOIUrl":"10.1007/s11837-024-07122-z","url":null,"abstract":"<div><p>This work provides an overview on the fabrication process, composition and properties of high-entropy alloy (HEA) coatings fabricated by electrodeposition. Special attention is paid to the effect of electrodeposition parameters and electrolyte composition on the microstructure, morphology, and mechanical/functional properties of the HEA coatings. It is demonstrated that the majority of researches has been focused on fabricating CoCrFeMnNi- and AlCrFeMnNi-based HEAs, with the addition of a few other elements by galvanostatic and potentiostatic techniques using both direct and pulsed current deposition modes. The fabricated HEA coatings exhibited different microstructures ranging from amorphous to nanocrystalline structures, exhibiting interesting magnetic, catalytic, and mechanical properties. Furthermore, we show that, while the possibility of fabricating metal matrix nanocomposite coatings using electrodeposition has been demonstrated, the fabricated composite coatings are mainly limited to transition element-based HEAs reinforced by graphene oxide and carbon nanotubes. Finally, several new directions and potential challenges such as electrochemical deposition of refractory HEAs and metal matrix composites reinforced by HEAs or high-entropy ceramics, as well as theoretical aspects of electrodeposition of HEAs and introducing machine learning to speed up the fabrication of novel coatings and optimize the processing parameters, are discussed.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"1005 - 1028"},"PeriodicalIF":2.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waves of Innovation: What to Expect at OTC 2025","authors":"Kaitlin Calva","doi":"10.1007/s11837-025-07233-1","DOIUrl":"10.1007/s11837-025-07233-1","url":null,"abstract":"","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"990 - 991"},"PeriodicalIF":2.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"JOM Talks with 2024 TMS President Srini Chada","authors":"Kelly Zappas","doi":"10.1007/s11837-025-07230-4","DOIUrl":"10.1007/s11837-025-07230-4","url":null,"abstract":"","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"976 - 977"},"PeriodicalIF":2.1,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Announcing the 2025 TMS Society Award Recipients","authors":"Kaitlin Calva","doi":"10.1007/s11837-025-07231-3","DOIUrl":"10.1007/s11837-025-07231-3","url":null,"abstract":"","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"978 - 984"},"PeriodicalIF":2.1,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TMS Meeting Headlines","authors":"","doi":"10.1007/s11837-025-07234-0","DOIUrl":"10.1007/s11837-025-07234-0","url":null,"abstract":"","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"992 - 992"},"PeriodicalIF":2.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Microstructure Evolution and Heat Treatment Process of Al-Si-Cu-Mg Cast Alloys Under Two-Step Solution Treatment","authors":"Hao Song,&nbsp;Yaqiang Tian,&nbsp;Keli Liu,&nbsp;Xiaoping Zheng,&nbsp;Yingli Wei,&nbsp;Zhenyu Liu,&nbsp;Runze Zhang,&nbsp;Junsheng Wang,&nbsp;Liansheng Chen,&nbsp;Mingshan Zhang","doi":"10.1007/s11837-025-07156-x","DOIUrl":"10.1007/s11837-025-07156-x","url":null,"abstract":"<div><p>The heat treatment process plays a decisive role in the microstructure and mechanical properties of alloys. However, it is difficult to optimize the heat treatment process of Al-Si-Cu-Mg cast alloys because of the different solubilities of Al₂Cu and Q-Al₅Cu₂Mg₈Si₆. In this study, the parameters of the heat treatment process were optimized by using thermal simulation and experimental, and the microstructure evolution during the solid solution process was studied. The results show that the dissolution temperatures of low melting point eutectic phase Al₂Cu and Q-Al₅Cu₂Mg₈Si₆ are 502°C and 539°C by using DSC. Spherical Al₂Cu phase is easily dissolved, and irregular Al₂Cu phase and Q-Al₅Cu₂Mg₈Si₆ phase are not easily dissolved under the one-step solution treatment. However, the two-step solution treatment makes the Q-Al₅Cu₂Mg₈Si₆ phase dissolve, which improves the solid solution degree of the alloy. The spheroidization degree of eutectic Si is the highest under the optimum one- and two-step solution process. The microhardness was the highest (76.4 ± 1.2 HV, 95.6 ± 2.0 HV). The optimal heat treatment processes are 500°C + 9 h + 170°C + 3 h and 500°C + 9 h + 535°C + 7 h + 170°C + 3 h, and the peak aging hardness is 132.9 ± 1.9 HV and 139.9 ± 2.1 HV, respectively.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"1252 - 1266"},"PeriodicalIF":2.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"JOM Technical Topics","authors":"","doi":"10.1007/s11837-025-07229-x","DOIUrl":"10.1007/s11837-025-07229-x","url":null,"abstract":"","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"972 - 973"},"PeriodicalIF":2.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Machining Mechanism and Wear Mechanism of Composite Coated Tools on CoCrFeNiAl0.6 High Entropy Alloy at High Speed","authors":"Ping Zhang,&nbsp;Shunxiang Wang,&nbsp;Tengfei Zhang,&nbsp;Changyin Lan,&nbsp;Xue Chen","doi":"10.1007/s11837-025-07157-w","DOIUrl":"10.1007/s11837-025-07157-w","url":null,"abstract":"<div><p>This study investigates the cutting and wear mechanisms of coated tools on CoCrFeNiAl0.6 high entropy alloy during high-speed machining. CoCrFeNiAl0.6 alloy, known for its high strength and hardness, presents significant challenges in machining, causing severe tool wear and workpiece damage. This research aims to optimize machining parameters and tool coatings for improved performance and tool life. Finite Element Method simulations and experimental tests were conducted to analyze cutting forces, temperatures, deformation rates, and tool wear under varying cutting speeds, depths, rake angles, and coating types. Cutting forces increased with both cutting depth and coating thickness but decreased with rake angle and speed, with forces reducing up to 10% between 800  mm/s and 1200 mm/s. Multi-layer coatings significantly reduced cutting forces, with TiAlN+TiN+Al₂O₃ coatings experiencing forces around 83% of those with TiAlN coatings. Cutting temperatures rose with cutting depth but decreased with speed; increasing the rake angle or coating thickness initially lowered temperatures but raised them with greater depths, resulting in up to 60% increase in the 0.5–0.7 mm range. Temperature differentials also grew with additional coating layers, with three-layer coatings showing a temperature drop between TiAlN and TiN layers 2.6 times greater than in two-layer coatings. Chip thickness and deformation rates declined with speed and rake angle; TiAlN coatings exhibited the highest deformation rates, while TiN coatings were the lowest, with aluminum additions further raising deformation rates by up to 4%. At a cutting depth of 0.3 mm, wear rates were 1.2 times those at 0.1 mm, increasing with speed and rake angle. For wear rates, single-layer coatings followed the trend TiAlN &gt; Al₂O₃ &gt; TiN, while multi-layer coatings followed TiAlN+Al₂O₃ &gt; TiAlN+TiN &gt; TiAlN+TiN+Al₂O₃. Additional layers reduced wear rates, with three-layered tools achieving only 90% of TiAlN’s wear rate. These findings offer valuable insights into coating design and machining parameters, providing practical guidance for enhancing the efficiency and stability of high-entropy alloy machining.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"1029 - 1043"},"PeriodicalIF":2.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the Improved Mechanical Properties and Corrosion Resistance in LM6 Alloy Through Eutectic Modification","authors":"Pawan Bohane,&nbsp;Suresh Bandi,&nbsp;R. Karthikeyan,&nbsp;Pallavi Deshmukh,&nbsp;Trushar B. Gohil,&nbsp;Ajeet K. Srivastav","doi":"10.1007/s11837-025-07131-6","DOIUrl":"10.1007/s11837-025-07131-6","url":null,"abstract":"<div><p>The present study investigates the effect of microstructure modification on the mechanical properties and corrosion resistance of the near-eutectic LM6 Al-Si alloy. The addition of 130 ppm of Sr significantly modifies the microstructure, transforming the flake-like morphology of eutectic Si into a fine fibrous form, promoting the formation of equiaxial dendrites of α-Al and reducing the size of the flake-like β-phase. These changes result in improved mechanical properties, including an increase in yield strength (106–113 MPa), ultimate tensile strength (155–174 MPa), and elongation (2.6–3.2%). Fractography analysis reveals that the LM6-Sr alloy exhibits a ductile fracture mode, whereas the unmodified LM6 alloy fails in a brittle manner. Despite a slight increase in porosity from 2.8% to 4.7%, the morphological modifications dominate the negative impact of porosity, resulting in an overall increase in mechanical properties. Additionally, the corrosion resistance of the LM6-Sr alloy was significantly improved, with a reduction in corrosion rate from 0.0593 mm/year to 0.0266 mm/year. Electrochemical impedance spectroscopy studies further confirmed enhanced corrosion resistance, showing higher charge transfer resistance (<i>R</i>_ct), oxide resistance (<i>R</i>_ox), and total impedance (<i>Z</i>_mod) for the LM6-Sr alloy.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"1208 - 1219"},"PeriodicalIF":2.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Refill Friction Stir Spot Welding of a Graphene-Reinforced AA 6061 Aluminum Alloy","authors":"Tong Wu,&nbsp;Yuding Liu,&nbsp;Shan Ji,&nbsp;Xiaochong Sui,&nbsp;Zhengwei Li","doi":"10.1007/s11837-025-07133-4","DOIUrl":"10.1007/s11837-025-07133-4","url":null,"abstract":"<div><p>Solid-state refill friction stir spot welding (RFSSW) has been used to join a graphene-reinforced AA 6061. The effect of tool rotating speed on the microstructure and mechanical properties of the welded joints was studied, and the results show that RFSSW is suitable to join graphene-reinforced aluminum alloy and that sound joints can be obtained using a wide parameter range. Changing the tool rotating speed from 1600 to 2200 rpm hardly changed the joint cross-section morphology. Like a traditional joint, the graphene-reinforced AA 6061 RFSSW joint can be divided into a heat-affected zone, a thermo-mechanically affected zone, and stir zone, and they all have different grain sizes, orientations, and recrystallization ratios. Compared with the pin-affected zone, the sleeve-affected zone has larger grain sizes, a higher low angle boundary ratio, and a higher recrystallization ratio. The graphene reacts with Mg, forming 974619Mg₂C₃ phase. A higher rotating speed contributes to the joint hardness. The joint lap shear failure load first increases and then decreases with increasing the rotating speed. The maximum failure load of 5178 N was obtained when using 1800 rpm. All the joints present a tensile–shear failure mode.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 3","pages":"1280 - 1291"},"PeriodicalIF":2.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}