JOM最新文献

{"title":"The Role of Deformation Conditions and Mo-Doping on the Evolution of Structure and Mechanical Properties of Powdered Iron Aluminide","authors":"O. I. Tolochyn,&nbsp;O. V. Tolochyna,&nbsp;Yu M. Podrezov,&nbsp;V. I. Danylenko,&nbsp;G. A. Bagliuk","doi":"10.1007/s11837-025-07249-7","DOIUrl":"10.1007/s11837-025-07249-7","url":null,"abstract":"<div><p>High-temperature strengthening of iron aluminides is achieved through forging powder technology, utilizing a combination of several structural factors. Milling the initial powder accelerates phase formation during the early stages of heating, contributing to an anisotropic fine-grained microstructure that retains the shape and size of the milled powder particles. Molybdenum micro-additives inhibit diffusion processes during high-temperature deformation, while segregation along boundaries and the distribution of ultra-fine complex oxide particles, formed in situ during mechanical activation and thermomechanical processing, enhance the dispersed strengthening mechanism. Optimizing the thermomechanical processing regimes further strengthens these structural factors. After forging at 1100°C, molybdenum-doped alloys exhibit higher low-temperature strength but show reduced fracture toughness and a tendency to delaminate. Subsequent annealing at 1300°C corrects these defects, though increasing the grain size and second-phase particles. The optimal structure and mechanical properties are achieved by triple forging at 1200°C, under conditions near dynamic recrystallization, and demonstrate a high room-temperature strength of 1600–1900 MPa. Molybdenum-doped alloys show an ultimate strength of 300–330 MPa when stretched at 700°C. The creep rate at 750°C decreases to 8.4 × 10⁻⁷ s⁻¹ for the 2% Mo alloy and 3.7 × 10⁻⁷ s⁻¹ for the 5% Mo alloy, comparable to modern austenitic steels.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 4","pages":"1940 - 1953"},"PeriodicalIF":2.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667897","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":"Micro-texture and Stress Evolution Under Monotonic Tension in an Additively Manufactured Near-α Titanium Alloy","authors":"Sita Choudhary,&nbsp;Gyan Shankar,&nbsp;Satyam Suwas","doi":"10.1007/s11837-025-07130-7","DOIUrl":"10.1007/s11837-025-07130-7","url":null,"abstract":"<div><p>The yield strength (<i>σ</i>_{<i>y</i>.<i>s</i>.}) of directed energy deposited near-<i>α</i> Ti-6Al-2Sn-4Zr-2Mo alloy exceeds 1000 MPa while possessing very low ductility of less than 10%. The possibility of enhancing the ductility without a significant decrease in the <i>σ</i>_{<i>y</i>.<i>s</i>.} is via judicious heat treatment which transforms the as-built martensitic <i>α</i>′ into an <i>α</i>/<i>β</i> phase mixture, which has been examined in conjunction with the numerical investigation on the correlation between microstructure and mechanical properties. The resulting alloy deforms in a heterogeneous manner with stress and strain, partitioning in the <i>α</i> and <i>β</i> phases. Deformation heterogeneity at the micron scale plays a vital role in the damage initiation and, consequently, the fracture process. Crystal plasticity based on fast-Fourier transform (CPFFT) simulations were carried out to study the evolution of spatially heterogeneous stress and strain in the two phases and to identify the correlation between the spatial strain–stress heterogeneity and the global mechanical response. Simulation results show the evolution of higher von Mises stress in the hcp <i>α</i> phase than the bcc <i>β</i> phase. Plastic heterogeneity of the two phases leads to strain incompatibility at the <i>α</i>–<i>β</i> interfaces, leading to microcrack initiation. Simulations capture the effect of crystallographic orientation on the evolution of localized equivalent von Mises stress and strain.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 4","pages":"1905 - 1922"},"PeriodicalIF":2.1,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668153","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":"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":"Experimental and Numerical Simulation Study on Microstructural Defect Control at Ti/Al Explosive Welding Clad Plates Interface","authors":"Jian Wang,&nbsp;Xiao-jie Li,&nbsp;Hong-hao Yan,&nbsp;Xiao-hong Wang,&nbsp;Jin-xiang Wang","doi":"10.1007/s11837-025-07129-0","DOIUrl":"10.1007/s11837-025-07129-0","url":null,"abstract":"<div><p>Titanium–aluminum explosive welding clad plates are extensively utilized in the aerospace and petrochemical industries. However, the presence of cracks and holes at the interface of these clad plates can adversely affect their strength and sealing performance. To mitigate the occurrence of such defects, explosive welding experiments were conducted on titanium and aluminum plates by varying the welding parameters. The experimental results reveal that the explosive welding interface of Ti/Al exhibits a regular corrugated shape, which tends to flatten due to aluminum’s low melting point and strength. Notably, when the welding parameters do not exceed collision velocity <span>(V_{p} le 839;{text{m/s}})</span> collision angle <span>(beta le 17.24^circ )</span>, there are no discernible vortex holes at the interface, and the melting zone remains small. The melting zone at the interfaces of different welding parameters contains various intermetallic compounds. Although the shear strength of the titanium–aluminum welding interface surpasses that of aluminum, it is unstable due to the influence of titanium content and the presence of crack holes. Simulations of the welding process using AUTODYN indicate that the derived trend of ripple morphology changes in the simulation interface offers valuable reference for the experiment.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 4","pages":"1816 - 1824"},"PeriodicalIF":2.1,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667855","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":"Recovery of Ni and Co from Nickel-Based Superalloy Scraps Leaching Solution for the Synthesis of NiCo2O4","authors":"Ning Yin,&nbsp;Yonghui Song,&nbsp;Xingyu Zhang,&nbsp;Ping Dong,&nbsp;Xinwei Zhang","doi":"10.1007/s11837-025-07187-4","DOIUrl":"10.1007/s11837-025-07187-4","url":null,"abstract":"<div><p>We aimed to recover Ni and Co from the leaching sulfate solution of nickel-based superalloy scraps (NSL) and to synthesize NiCo₂O₄ through oxalate co-precipitation-calcination technique. The structural and compositional analyses of the resultant products were characterized utilizing x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Furthermore, the effects of nickel-cobalt molar ratio and calcination temperature on the oxygen evolution reaction (OER) performance were investigated. The results indicated that under optimal conditions of 0.7 M C₂O₄²⁻ addition, 25°C, and 4 h reaction time, the precipitation efficiencies for Co²⁺ and Ni²⁺ were 99.19% and 95.79%, respectively. The precipitate derived from adjusting the Ni/Co molar ratio in NSL manifested as a solid solution of nickel-cobalt oxalate (Ni_xCo_3-x(C₂O₄)₃). As the molar ratio decreased, the precipitates gradually transformed from a nickel oxalate structure with Ni sites replaced by Co to a cobalt oxalate structure with Ni replacing Co sites. The pure phase structure NiCo₂O₄, synthesized with a Ni/Co molar ratio of 1/2 and calcined at 450°C for 2 h, exhibited an overpotential of 430 mV at a current density of 10 mA·cm⁻² in 0.1 M KOH, a Tafel slope of 93.69 mV·dec⁻¹, and a C_dl of 242.75 mF·cm⁻². Upon exceeding 450°C during calcination, the gradual expulsion of heteroatoms from the matrix resulted in structural destruction. Consequently, the electrocatalytic activity of the sample decreased because of the gradual removal of surface oxygen vacancy concentration and Co³⁺/Co³⁺ + Co²⁺. The methodology employed in this study not only efficiently recovers Ni²⁺ and Co²⁺ from the NSL but also prepares electrocatalysts with superior performance for the oxygen evolution reaction.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 4","pages":"2178 - 2188"},"PeriodicalIF":2.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668005","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}