Metallurgist最新文献_第9页

Corrosion resistance of materials obtained by non-vacuum electron beam surfacing with niobium-hafnium-tantalum powder mixtures 非真空电子束表面处理铌-铪-钽粉混合物所得材料的耐腐蚀性能

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-15 DOI: 10.1007/s11015-025-02071-7

E. A. Drobyaz, V. A. Bataev, P. M. Petukhova, O. N. Novgorodtseva

{"title":"Corrosion resistance of materials obtained by non-vacuum electron beam surfacing with niobium-hafnium-tantalum powder mixtures","authors":"E. A. Drobyaz, V. A. Bataev, P. M. Petukhova, O. N. Novgorodtseva","doi":"10.1007/s11015-025-02071-7","DOIUrl":"10.1007/s11015-025-02071-7","url":null,"abstract":"<div><p>The article presents the results of studying the structure, corrosion resistance, and heat resistance of coatings obtained by depositing Nb-Hf-Ta and Nb-Hf-Ta-Cr powder mixtures onto structural steel. The deposition was performed using a relativistic electron beam in air. The coating thickness was ~ 2.4 mm. It is shown that during electron beam heating, a dendritic structure is formed in the surface layers, consisting of a ferrite matrix (α-Fe) and intermetallic compounds (TaFe<sub>2</sub> and Cr<sub>2</sub>Hf). The microhardness of the hardened layers was as high as 800–850 <i>HV</i>. Depositing protective coatings leads to an increased corrosion resistance of the developed materials in 10% nitric acid solution. Depositing Nb-Ta-Hf increases the passivation region compared to stainless steel 12Kh18N9T (0.12C-18Cr-9Ni-Ti). However, such formed layer does not provide satisfactory corrosion protection in aggressive environment. The addition of chromium to the surfacing mixture enhances passivation due to its ability to form dense oxide layers. The heat resistance of the hardened layers was assessed. It was established that the heat resistance of the formed surface layers at 850 °C is 3 times higher compared to corrosion-resistant steel 12Kh18N9T.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 9","pages":"1452 - 1459"},"PeriodicalIF":0.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458834","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}

引用次数: 0

Molecular dynamics simulation of dislocation structure evolution in iron crystals under compression 压缩条件下铁晶体位错结构演化的分子动力学模拟

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-15 DOI: 10.1007/s11015-025-02058-4

I. A. Bataev, I. E. Nasennik, A. V. Shutov, A. E. Rizniitskiy, S. V. Stankevich, T. S. Ogneva

{"title":"Molecular dynamics simulation of dislocation structure evolution in iron crystals under compression","authors":"I. A. Bataev, I. E. Nasennik, A. V. Shutov, A. E. Rizniitskiy, S. V. Stankevich, T. S. Ogneva","doi":"10.1007/s11015-025-02058-4","DOIUrl":"10.1007/s11015-025-02058-4","url":null,"abstract":"<div><p>This study used molecular dynamics simulations to investigate the evolution of dislocation structures in iron single crystals during uniaxial compression along various crystallographic directions. The Dislocation Extraction Algorithm (DXA) was used to identify dislocations, analyze their density, and determine Burgers vectors. The transition from elastic to plastic deformation in defect-free crystals occurred at significantly higher stresses than those observed in classical iron-based alloys. This finding is consistent with experimental data for whisker crystals. Plastic flow is cyclic, with periods of gradual hardening followed by abrupt softening. This correlates with the dynamic reorganization of the dislocation structure. The predominant dislocation type was ½< 111>, while < 100> and < 110> dislocations were observed less frequently. These results provide deeper insight into the mechanisms of irreversible deformation in iron at the atomic scale and may be useful for modeling material behavior under extreme loads.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 9","pages":"1340 - 1347"},"PeriodicalIF":0.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458836","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}

引用次数: 0

Electron beam surface hardening by depositing nickel-chromium based layers in air 在空气中沉积镍铬基层的电子束表面硬化

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-15 DOI: 10.1007/s11015-025-02063-7

D. O. Mul, V. G. Burov, A. I. Popelyukh, A. B. Yurgin, E. D. Esikova

{"title":"Electron beam surface hardening by depositing nickel-chromium based layers in air","authors":"D. O. Mul, V. G. Burov, A. I. Popelyukh, A. B. Yurgin, E. D. Esikova","doi":"10.1007/s11015-025-02063-7","DOIUrl":"10.1007/s11015-025-02063-7","url":null,"abstract":"<div><p>Austenitic chromium-nickel steels are extensively used in the fabrication of parts and assemblies for oil and mining equipment due to their excellent manufacturability and corrosion resistance. However, these steels exhibit limited resistance to abrasive wear. Surface modification of steel workpieces offers a route to enhance this property. In this study, non-vacuum electron beam deposition was utilized as a surface hardening method. A commercial grade nickel-chromium based self-fluxing powder was deposited onto the steel workpieces made of austenitic stainless steel 12Kh18N9T (0.12 C–18Cr–9Ni–Ti) equivalent to AISI 321. The microstructure of the resulting coatings was characterized by optical and scanning electron microscopy. The phase composition of the materials was determined by X‑ray diffraction analysis. Abrasive wear resistance was evaluated under exposure to fixed and loosely fixed abrasive particles. The primary structural components of the modified layers included a solid solution of iron and chromium in nickel, as well as crystals of chromium borides (CrB and Cr<sub>5</sub>B<sub>3</sub>) and complex carbide ((Cr,Fe)<sub>23</sub>C<sub>6</sub>). The microhardness of the modified layers measuring up to 6 GPa was achieved. The minimum mass loss during the abrasive wear testing was observed during an electron beam deposition of the material with a specific surface energy of 3.9 kJ/cm<sup>2</sup>. The wear rate of this surface-modified alloy, when tested against fixed and loosely fixed abrasive particles, was reduced by factors of 1.2 and 2.7, respectively, compared to the untreated austenitic chromium-nickel steel. A sequential deposition of two surface layers resulted in further improvement in the tribological performance of the surface-alloyed material, exhibiting a 1.7-fold and 3.9-fold increase in wear resistance under exposure to fixed and loosely fixed abrasive particles, respectively, relative to the base material.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 9","pages":"1381 - 1389"},"PeriodicalIF":0.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458830","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}

引用次数: 0

Microstructure of binary iron-aluminum alloys produced by aluminothermy 铝热法制备二元铁铝合金的显微组织

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-15 DOI: 10.1007/s11015-025-02069-1

S. G. Zhilin, V. V. Predein, V. A. Khudyakova, N. A. Bogdanova

{"title":"Microstructure of binary iron-aluminum alloys produced by aluminothermy","authors":"S. G. Zhilin, V. V. Predein, V. A. Khudyakova, N. A. Bogdanova","doi":"10.1007/s11015-025-02069-1","DOIUrl":"10.1007/s11015-025-02069-1","url":null,"abstract":"<div><p>Binary iron-aluminum (Fe-Al) intermetallic alloys have unique properties that make them ideal for many industrial applications. These include metallurgy, where they are used as master alloys, and mechanical engineering, where they are used for components that require high abrasion and corrosion resistance. However, conventional methods for producing Fe-Al alloy surfaces or components are often complex and multi-stage, underscoring the need for more energy-efficient approaches. One promising alternative is the single-stage aluminothermic processing of thermite charges. Several factors influence the final properties of the cast metal product obtained through this method, including the initial chemical composition and the temperatures of the charge and refractory materials. Based on previous experimental results, which included data on melt-jet temperature, metal phase mass, density, and final alloy composition, this paper presents a comparative analysis of how these factors influence the microstructure of Fe-Al intermetallic alloys. These alloys were formed by exothermic processing of thermite charges containing 25 to 60 wt % of aluminum. Analysis presented in this work identified a processing method that maximizes the aluminum content in the final alloys. Additionally, the formation of compositionally homogeneous and heterogeneous structures was characterized and the influence of different thermal conditions on grain size was investigated.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 9","pages":"1434 - 1443"},"PeriodicalIF":0.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458785","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}

引用次数: 0

Influence of laser treatment on the structure and wear resistance of Co-Cr coatings obtained by cold spraying 激光处理对冷喷涂Co-Cr涂层组织和耐磨性的影响

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-15 DOI: 10.1007/s11015-025-02066-4

T. M. Vidyuk, E. A. Vozdvizhenskaya, V. S. Shikalov, A. A. Golyshev, V. F. Kosarev, A. G. Malikov

{"title":"Influence of laser treatment on the structure and wear resistance of Co-Cr coatings obtained by cold spraying","authors":"T. M. Vidyuk, E. A. Vozdvizhenskaya, V. S. Shikalov, A. A. Golyshev, V. F. Kosarev, A. G. Malikov","doi":"10.1007/s11015-025-02066-4","DOIUrl":"10.1007/s11015-025-02066-4","url":null,"abstract":"<div><p>In this study, the influence of laser treatment on the structure and tribological properties of Co-Cr coatings obtained by cold spraying was investigated. A powder mixture consisting of cobalt and chromium at a ratio of 40:60 wt. % was sprayed onto a stainless steel substrate. The content of chromium in the resulting coating was about 30 wt. %. The laser treatment of the coating was performed at a scanning rate of 45 mm/s and power of 1 kW in order to minimize the amount of defects (e.g., pores, cracks, discontinuities). The structure and phase composition of the resulting coatings were studied by scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction analysis. It was shown that the phase composition of the initial coatings is represented by cobalt and chromium, whereas the laser treated coatings only contain cobalt-based solid solution. Changes in the structure and phase composition after the laser treatment of the coatings resulted in a 2-fold increase in the wear resistance, with the specific wear rate under the dry friction conditions measuring 3.99×10<sup>−5</sup> mm<sup>3</sup>/(N×m). The wear surface analysis has shown that as a result of the laser treatment, the wear mechanism changed from abrasive-oxidative to oxidative.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 9","pages":"1410 - 1417"},"PeriodicalIF":0.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458832","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}

引用次数: 0

Horizontal continuous casting machines with two-sided strand withdrawal 双面取坯卧式连铸机

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-15 DOI: 10.1007/s11015-025-02072-6

Elizaveta Sh. Kovnatskaya, Viktor V. Reshetov, Anatoly V. Protasov

引用次数: 0

Influence of manganese oxide synthesis method on the structure and properties of MnZn ferrites 氧化锰合成方法对锰锌铁氧体结构和性能的影响

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-12 DOI: 10.1007/s11015-025-02061-9

R. R. Khabirov, R. I. Kuzmin, A. V. Mass, A. A. Miller, M. Yu. Agafonov, N. S. Aleksandrova, V. A. Bataev

引用次数: 0

Structure and properties of Hf–Ti–B coatings deposited by non-vacuum electron beam surfacing 非真空电子束堆焊Hf-Ti-B涂层的结构与性能

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-12 DOI: 10.1007/s11015-025-02062-8

E. G. Bushueva, E. I. Shyyrap, O. N. Novgorodtseva, E. M. Turlo, V. A. Bataev

引用次数: 0

Mechanochemical synthesis of niobium silicides from industrial waste 从工业废渣中机械化学合成硅化铌

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-12 DOI: 10.1007/s11015-025-02068-2

E. D. Golovin, N. E. Belyaev, S. V. Stankevich, K. A. Antropova

引用次数: 0

The structure and heat resistance of the surface layers formed by depositing powder mixtures of boron, chromium and tungsten onto corrosion-resistant steel 将硼、铬和钨的粉末混合物沉积在耐腐蚀钢上所形成的表面层的结构和耐热性

IF 0.9 4区材料科学

Metallurgist Pub Date : 2026-01-12 DOI: 10.1007/s11015-025-02070-8

E. A. Pukhova, P. M. Petukhova, V. E. Andryushkina, V. A. Bataev, Yu. N. Malyutina, E. V. Domarov

{"title":"The structure and heat resistance of the surface layers formed by depositing powder mixtures of boron, chromium and tungsten onto corrosion-resistant steel","authors":"E. A. Pukhova, P. M. Petukhova, V. E. Andryushkina, V. A. Bataev, Yu. N. Malyutina, E. V. Domarov","doi":"10.1007/s11015-025-02070-8","DOIUrl":"10.1007/s11015-025-02070-8","url":null,"abstract":"<div><p>Surface layers having a thickness of ~ 2 mm, alloyed with tungsten, chromium, and boron, were formed on the samples of steel 12Kh18N9T (0.12C–18Cr–9Ni–Ti) by non-vacuum electron beam surfacing. The structure and phase composition of two types of alloys, obtained by depositing powder mixtures containing 10 or 20 wt. % tungsten in combination with 5 wt. % chromium and 30 wt. % boron, were studied. The surface layers, deposited by electron beam surfacing, exhibit a pre-eutectic structure comprising a solid solution (matrix) and colonies of lamellar eutectics with complex borides (hardening particles). After depositing the powder mixture (10W–5Cr–30B), the ductile matrix of the alloy is represented by a solid solution of chromium and nickel in γ‑Fe, with the eutectics containing (Cr, Fe)<sub>2</sub>B particles. The alloy obtained by depositing a mixture with increased tungsten content (20W–5Cr–30B) exhibits two types of solid solutions: γ‑Fe(Cr, Ni) and α‑Fe(Cr, Ni). The eutectic colonies contain borides, such as (Cr, Fe)<sub>2</sub>B and (Cr, W)<sub>3</sub>B<sub>4</sub>. The heat resistance of the modified layers exceeds that of steel 12Kh18N9T (AISI 321) by a factor of 5 (tested at 650 °C for 100 h). During oxidation of the surface-alloyed materials, an oxide film of the (Fe<sub>3–х</sub>Cr<sub>х</sub>)O<sub>4</sub> type is formed.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 9","pages":"1444 - 1451"},"PeriodicalIF":0.9,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458967","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}

引用次数: 0