Transactions of Nonferrous Metals Society of China最新文献

英文中文

Influence of anodization conditions on deposition of hydroxyapatite on α/β Ti alloys for osseointegration: Atomic force microscopy analysis

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-11-01 DOI: 10.1016/S1003-6326(24)66630-6

Rania E. HAMMAM , Engie M. SAFWAT , Soha A. ABDEL-GAWAD , Madiha SHOEIB , Shimaa EL-HADAD

Integrating titanium-based implants with the surrounding bone tissue remains challenging. This study aims to explore the impact of different anodization voltages (20-80 V) on the surface topography of two-phase (α/β) Ti alloys and to produce TiO₂ films with enhanced bone formation abilities. Scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS) and atomic force microscopy (AFM) were applied to investigate the morphological, chemical, and surface topography of the prepared alloys and to confirm the growth of hydroxyapatite (HA) on their surfaces. Results disclosed that the surface roughness of TiO₂ films formed on Ti-6Al-7Nb alloys was superior to that of Ti-6Al-4V alloys. Ti-6Al-7Nb alloy anodized at 80 V had the highest yields of HA after immersion in simulated body fluid with enhanced HA surface coverage. The developed HA layer had a mean thickness of (128.38±18.13) µm, suggesting its potential use as an orthopedic implantable material due to its promising bone integration and, hence, remarkable stability inside the human body.

{"title":"Influence of anodization conditions on deposition of hydroxyapatite on α/β Ti alloys for osseointegration: Atomic force microscopy analysis","authors":"Rania E. HAMMAM , Engie M. SAFWAT , Soha A. ABDEL-GAWAD , Madiha SHOEIB , Shimaa EL-HADAD","doi":"10.1016/S1003-6326(24)66630-6","DOIUrl":"10.1016/S1003-6326(24)66630-6","url":null,"abstract":"<div><div>Integrating titanium-based implants with the surrounding bone tissue remains challenging. This study aims to explore the impact of different anodization voltages (20-80 V) on the surface topography of two-phase (<em>α</em>/<em>β</em>) Ti alloys and to produce TiO<sub>2</sub> films with enhanced bone formation abilities. Scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS) and atomic force microscopy (AFM) were applied to investigate the morphological, chemical, and surface topography of the prepared alloys and to confirm the growth of hydroxyapatite (HA) on their surfaces. Results disclosed that the surface roughness of TiO<sub>2</sub> films formed on Ti-6Al-7Nb alloys was superior to that of Ti-6Al-4V alloys. Ti-6Al-7Nb alloy anodized at 80 V had the highest yields of HA after immersion in simulated body fluid with enhanced HA surface coverage. The developed HA layer had a mean thickness of (128.38±18.13) µm, suggesting its potential use as an orthopedic implantable material due to its promising bone integration and, hence, remarkable stability inside the human body.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3629-3649"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Enhanced visible-light-driven reduction of hexavalent chromium under neutral conditions using quasi-MOF photocatalysts via thiocyanate modulation

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-11-01 DOI: 10.1016/S1003-6326(24)66633-1

Yi ZHANG , Han-xiao LIAO , Lu YANG , Bin-hua ZHOU , Xuan-zhi LIU , Huan-huan ZHAI , Xiao-rong HE , Hong-jun HUANG , Peng-fei TAN , Jun PAN

In order to address the issue that the photocatalytic reduction of hexavalent chromium (Cr(VI)) is often limited by the inefficient utilization of electrons in photocatalysts, a quasi-MOF photocatalyst using thiocyanate (—SCN) was developed as a modulator to enhance the charge transfer properties of ZIF-L-based photocatalysts. The incorporation of —SCN introduced structural defects, which improved visible light absorption and the reduction ability of photogenerated electrons. —SCN significantly adjusted the electronic properties and established a stable electron release pathway, serving as active sites for reduction. The optimized quasi-MOF demonstrated a Cr(VI) reduction rate of 94.8% in neutral potassium thiocyanate solution under visible light without a hole scavenger. The reaction rate constant is 2.8 times that of the photocatalyst without defect modulation. This study offers a promising strategy for developing highly efficient photocatalysts for environmental remediation.

{"title":"Enhanced visible-light-driven reduction of hexavalent chromium under neutral conditions using quasi-MOF photocatalysts via thiocyanate modulation","authors":"Yi ZHANG , Han-xiao LIAO , Lu YANG , Bin-hua ZHOU , Xuan-zhi LIU , Huan-huan ZHAI , Xiao-rong HE , Hong-jun HUANG , Peng-fei TAN , Jun PAN","doi":"10.1016/S1003-6326(24)66633-1","DOIUrl":"10.1016/S1003-6326(24)66633-1","url":null,"abstract":"<div><div>In order to address the issue that the photocatalytic reduction of hexavalent chromium (Cr(VI)) is often limited by the inefficient utilization of electrons in photocatalysts, a quasi-MOF photocatalyst using thiocyanate (—SCN) was developed as a modulator to enhance the charge transfer properties of ZIF-L-based photocatalysts. The incorporation of —SCN introduced structural defects, which improved visible light absorption and the reduction ability of photogenerated electrons. —SCN significantly adjusted the electronic properties and established a stable electron release pathway, serving as active sites for reduction. The optimized quasi-MOF demonstrated a Cr(VI) reduction rate of 94.8% in neutral potassium thiocyanate solution under visible light without a hole scavenger. The reaction rate constant is 2.8 times that of the photocatalyst without defect modulation. This study offers a promising strategy for developing highly efficient photocatalysts for environmental remediation.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3677-3692"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Improvement of microstructure and mechanical properties of Al-Cu-Li-Mg-Zn alloys through water-cooling centrifugal casting technique

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-11-01 DOI: 10.1016/S1003-6326(24)66621-5

Qing-bo YANG , Wen-jing SHI , Wen LIU , Miao WANG , Wen-bo WANG , Li-na JIA , Hu ZHANG

The microstructure and mechanical properties of as-cast Al-Cu-Li-Mg-Zn alloys fabricated by conventional gravity casting and centrifugal casting techniques combined with rapid solidification were investigated. Experimental results demonstrated that compared with the gravity casting technique, the water-cooling centrifugal casting technique significantly reduces porosity, refines α(Al) grains and secondary phases, modifies the morphology of secondary phases, and mitigates both macro- and micro-segregation. These improvements arise from the synergistic effects of the vigorous backflow, centrifugal field, vibration and rapid solidification. Porosity and coarse plate-like Al₁₃Fe₄/Al₇Cu₂Fe phase result in the fracture before the gravity-cast alloy reaches the yield point. The centrifugal-cast alloy, however, exhibits an ultra-high yield strength of 292.0 MPa and a moderate elongation of 6.1%. This high yield strength is attributed to solid solution strengthening (SSS) of 225.3 MPa, and grain boundary strengthening (GBS) of 35.7 MPa. Li contributes the most to SSS with a scaling factor of 7.9 MPa·wt.%^-1. The elongation of the centrifugal-cast alloy can be effectively enhanced by reducing the porosity and segregation behavior, refining the microstructure and changing the morphology of secondary phases.

{"title":"Improvement of microstructure and mechanical properties of Al-Cu-Li-Mg-Zn alloys through water-cooling centrifugal casting technique","authors":"Qing-bo YANG , Wen-jing SHI , Wen LIU , Miao WANG , Wen-bo WANG , Li-na JIA , Hu ZHANG","doi":"10.1016/S1003-6326(24)66621-5","DOIUrl":"10.1016/S1003-6326(24)66621-5","url":null,"abstract":"<div><div>The microstructure and mechanical properties of as-cast Al-Cu-Li-Mg-Zn alloys fabricated by conventional gravity casting and centrifugal casting techniques combined with rapid solidification were investigated. Experimental results demonstrated that compared with the gravity casting technique, the water-cooling centrifugal casting technique significantly reduces porosity, refines <em>α</em>(Al) grains and secondary phases, modifies the morphology of secondary phases, and mitigates both macro- and micro-segregation. These improvements arise from the synergistic effects of the vigorous backflow, centrifugal field, vibration and rapid solidification. Porosity and coarse plate-like Al<sub>13</sub>Fe<sub>4</sub>/Al<sub>7</sub>Cu<sub>2</sub>Fe phase result in the fracture before the gravity-cast alloy reaches the yield point. The centrifugal-cast alloy, however, exhibits an ultra-high yield strength of 292.0 MPa and a moderate elongation of 6.1%. This high yield strength is attributed to solid solution strengthening (SSS) of 225.3 MPa, and grain boundary strengthening (GBS) of 35.7 MPa. Li contributes the most to SSS with a scaling factor of 7.9 MPa·wt.%<sup>-1</sup>. The elongation of the centrifugal-cast alloy can be effectively enhanced by reducing the porosity and segregation behavior, refining the microstructure and changing the morphology of secondary phases.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3486-3503"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 review on advances of high-throughput experimental technology for titanium alloys

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-11-01 DOI: 10.1016/S1003-6326(24)66618-5

Ke-chao ZHOU , Xiu-ye YANG , Yi-xin AN , Jun-yang HE , Bing-feng WANG , Xiao-yong ZHANG

Ti alloys, as leading lightweight and high-strength metallic materials, exhibit significant application potential in aerospace, marine engineering, biomedical, and other industries. However, the lack of fundamental understanding of the microstructure-property relationship results in prolonged research and development (R&D) cycles, hindering the optimization of the performance of Ti alloys. Recently, the advent of high-throughput experimental (HTE) technology has shown promise in facilitating the efficient and demand-driven development of next-generation Ti alloys. This work reviews the latest advancements in HTE technology for Ti alloys. The high-throughput preparation (HTP) techniques commonly used in the fabrication of Ti alloys are addressed, including diffusion multiple, additive manufacturing (AM), vapor deposition and others. The current applications of high-throughput characterization (HTC) techniques in Ti alloys are shown. Finally, the research achievements in HTE technology for Ti alloys are summarized and the challenges faced in their industrial application are discussed.

{"title":"A review on advances of high-throughput experimental technology for titanium alloys","authors":"Ke-chao ZHOU , Xiu-ye YANG , Yi-xin AN , Jun-yang HE , Bing-feng WANG , Xiao-yong ZHANG","doi":"10.1016/S1003-6326(24)66618-5","DOIUrl":"10.1016/S1003-6326(24)66618-5","url":null,"abstract":"<div><div>Ti alloys, as leading lightweight and high-strength metallic materials, exhibit significant application potential in aerospace, marine engineering, biomedical, and other industries. However, the lack of fundamental understanding of the microstructure-property relationship results in prolonged research and development (R&D) cycles, hindering the optimization of the performance of Ti alloys. Recently, the advent of high-throughput experimental (HTE) technology has shown promise in facilitating the efficient and demand-driven development of next-generation Ti alloys. This work reviews the latest advancements in HTE technology for Ti alloys. The high-throughput preparation (HTP) techniques commonly used in the fabrication of Ti alloys are addressed, including diffusion multiple, additive manufacturing (AM), vapor deposition and others. The current applications of high-throughput characterization (HTC) techniques in Ti alloys are shown. Finally, the research achievements in HTE technology for Ti alloys are summarized and the challenges faced in their industrial application are discussed.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3425-3451"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Distribution behavior of valuable elements in oxygen-enriched top-blown smelting process of waste printed circuit boards

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-11-01 DOI: 10.1016/S1003-6326(24)66636-7

Kang YAN , Wen-can QUAN , Zhong-tang ZHANG , Hua-ping NIE , Rui-xiang WANG , Zhi-feng XU

Oxygen-enriched top-blown smelting is a promising technology for processing waste printed circuit boards (WPCBs). The distribution behavior of valuable elements in WPCBs during smelting was investigated by varying the oxygen-enriched concentration, oxygen volume, CaO/SiO₂ (mass ratio), and Fe/SiO₂ (mass ratio). The optimal operating conditions were obtained by implementing a one-factor-at-a-time method. X-ray diffractometer, scanning electron microscopy-energy dispersive spectrometer, and inductive coupled plasma-atomic emission spectroscopy methods were utilized to detect the chemical composition, occurrence state as well as elemental contents of alloy and slag. It is found that the elements of Cu, Sn and Ni are mainly accumulated in the alloy while Fe is mainly oxidized into the slag. The direct yields of Cu, Sn and Ni are 90.18%, 85.32% and 81.10% under the optimal conditions of temperature 1250 °C, oxygen-enriched concentration 30%, oxygen volume 24 L, CaO/SiO₂ mass ratio 0.55, and Fe/SiO₂ mass ratio 1.05. The results show that the valuable metals are mainly lost in the slag through mechanical entrainment.

{"title":"Distribution behavior of valuable elements in oxygen-enriched top-blown smelting process of waste printed circuit boards","authors":"Kang YAN , Wen-can QUAN , Zhong-tang ZHANG , Hua-ping NIE , Rui-xiang WANG , Zhi-feng XU","doi":"10.1016/S1003-6326(24)66636-7","DOIUrl":"10.1016/S1003-6326(24)66636-7","url":null,"abstract":"<div><div>Oxygen-enriched top-blown smelting is a promising technology for processing waste printed circuit boards (WPCBs). The distribution behavior of valuable elements in WPCBs during smelting was investigated by varying the oxygen-enriched concentration, oxygen volume, CaO/SiO<sub>2</sub> (mass ratio), and Fe/SiO<sub>2</sub> (mass ratio). The optimal operating conditions were obtained by implementing a one-factor-at-a-time method. X-ray diffractometer, scanning electron microscopy-energy dispersive spectrometer, and inductive coupled plasma-atomic emission spectroscopy methods were utilized to detect the chemical composition, occurrence state as well as elemental contents of alloy and slag. It is found that the elements of Cu, Sn and Ni are mainly accumulated in the alloy while Fe is mainly oxidized into the slag. The direct yields of Cu, Sn and Ni are 90.18%, 85.32% and 81.10% under the optimal conditions of temperature 1250 °C, oxygen-enriched concentration 30%, oxygen volume 24 L, CaO/SiO<sub>2</sub> mass ratio 0.55, and Fe/SiO<sub>2</sub> mass ratio 1.05. The results show that the valuable metals are mainly lost in the slag through mechanical entrainment.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3721-3736"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Effect of Ni on microstructure and mechanical properties of Al-Mg-Si alloy for laser powder bed fusion

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-11-01 DOI: 10.1016/S1003-6326(24)66623-9

Yi-mou LUO , Jian-ying WANG , Tao WEN , Fei-peng YANG , Meng-zhen ZHU , Na HE , Jian-ming ZHENG , Ling SHAN , Hai-lin YANG

The microstructures and mechanical properties were systematically studied for the high-strength Al-5Mg₂Si-1.5Ni alloy fabricated by laser powder bed fusion (L-PBF). It is found that the introduction of Ni (1.5 wt.%) into an Al-5Mg₂Si alloy can significantly improve the L-PBF processibility and provide remarkable improvement in mechanical properties. The solidification range of just 85.5 K and the typical Al-Al₃Ni eutectics could be obtained in the Ni-modified Al-5Mg₂Si samples with a high relative density of 99.8% at the volumetric energy density of 107.4 J/mm³. Additionally, the refined hierarchical microstructure was mainly characterized by heterogeneous α-Al matrix grains (14.6 μm) that contain the interaction between dislocations and Al-Al₃Ni eutectics as well as Mg₂Si particles. Through synergetic effects of grain refinement, dislocation strengthening and precipitation strengthening induced by Ni addition, the L-PBFed Al-5Mg₂Si-1.5Ni alloy achieved superior mechanical properties, which included the yield strength of (425±15) MPa, the ultimate tensile strength of (541±11) MPa and the elongation of (6.2±0.2)%.

{"title":"Effect of Ni on microstructure and mechanical properties of Al-Mg-Si alloy for laser powder bed fusion","authors":"Yi-mou LUO , Jian-ying WANG , Tao WEN , Fei-peng YANG , Meng-zhen ZHU , Na HE , Jian-ming ZHENG , Ling SHAN , Hai-lin YANG","doi":"10.1016/S1003-6326(24)66623-9","DOIUrl":"10.1016/S1003-6326(24)66623-9","url":null,"abstract":"<div><div>The microstructures and mechanical properties were systematically studied for the high-strength Al-5Mg<sub>2</sub>Si-1.5Ni alloy fabricated by laser powder bed fusion (L-PBF). It is found that the introduction of Ni (1.5 wt.%) into an Al-5Mg<sub>2</sub>Si alloy can significantly improve the L-PBF processibility and provide remarkable improvement in mechanical properties. The solidification range of just 85.5 K and the typical Al-Al<sub>3</sub>Ni eutectics could be obtained in the Ni-modified Al-5Mg<sub>2</sub>Si samples with a high relative density of 99.8% at the volumetric energy density of 107.4 J/mm<sup>3</sup>. Additionally, the refined hierarchical microstructure was mainly characterized by heterogeneous <em>α</em>-Al matrix grains (14.6 μm) that contain the interaction between dislocations and Al-Al<sub>3</sub>Ni eutectics as well as Mg<sub>2</sub>Si particles. Through synergetic effects of grain refinement, dislocation strengthening and precipitation strengthening induced by Ni addition, the L-PBFed Al-5Mg<sub>2</sub>Si-1.5Ni alloy achieved superior mechanical properties, which included the yield strength of (425±15) MPa, the ultimate tensile strength of (541±11) MPa and the elongation of (6.2±0.2)%.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3521-3535"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Stable and reversible zinc metal anode with fluorinated graphite nanosheets surface coating 具有氟化石墨纳米片表面涂层的稳定可逆锌金属阳极

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-10-01 DOI: 10.1016/S1003-6326(24)66613-6

Hong CHANG , Zhen-ya LUO , Xue-ru SHI , Xin-xin CAO , Shu-quan LIANG

A highly stable zinc metal anode modified with a fluorinated graphite nanosheets (FGNSs) coating was designed. The porous structure of the coating layer effectively hinders lateral mass transfer of Zn ions and suppresses dendrite growth. Moreover, the high electronegativity exhibited by fluorine atoms creates an almost superhydrophobic solid−liquid interface, thereby reducing the interaction between solvent water and the zinc substrate. Consequently, this leads to a significant inhibition of hydrogen evolution corrosion and other side reactions. The modified anode demonstrates exceptional cycling stability, as symmetric cells exhibit sustained cycling for over 1400 h at a current density of 5 mA/cm². Moreover, the full cells with NH₄V₄O₁₀ cathode exhibit an impressive capacity retention rate of 92.2% after undergoing 1000 cycles.

我们设计了一种具有氟化石墨纳米片（FGNSs）涂层的高稳定性锌金属阳极。涂层的多孔结构有效地阻碍了锌离子的横向传质，并抑制了枝晶的生长。此外，氟原子表现出的高电负性形成了几乎超疏水的固液界面，从而减少了溶剂水与锌基底之间的相互作用。因此，这极大地抑制了氢演化腐蚀和其他副反应。改进后的阳极具有优异的循环稳定性，对称电池在 5 mA/cm2 的电流密度下可持续循环 1400 小时以上。此外，采用 NH4V4O10 阴极的全电池在经历 1000 次循环后，容量保持率高达 92.2%，令人印象深刻。

引用次数: 0

High-throughput studies and machine learning for design of β titanium alloys with optimum properties 利用高通量研究和机器学习设计具有最佳性能的 β 钛合金

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-10-01 DOI: 10.1016/S1003-6326(24)66602-1

Wei-min CHEN , Jin-feng LING , Kewu BAI , Kai-hong ZHENG , Fu-xing YIN , Li-jun ZHANG , Yong DU

Based on experimental data, machine learning (ML) models for Young’s modulus, hardness, and hot-working ability of Ti-based alloys were constructed. In the models, the interdiffusion and mechanical property data were high-throughput re-evaluated from composition variations and nanoindentation data of diffusion couples. Then, the Ti−(22±0.5)at.%Nb−(30±0.5)at.%Zr−(4±0.5)at.%Cr (TNZC) alloy with a single body-centered cubic (BCC) phase was screened in an interactive loop. The experimental results exhibited a relatively low Young’s modulus of (58±4) GPa, high nanohardness of (3.4±0.2) GPa, high microhardness of HV (520±5), high compressive yield strength of (1220±18) MPa, large plastic strain greater than 30%, and superior dry- and wet-wear resistance. This work demonstrates that ML combined with high-throughput analytic approaches can offer a powerful tool to accelerate the design of multicomponent Ti alloys with desired properties. Moreover, it is indicated that TNZC alloy is an attractive candidate for biomedical applications.

根据实验数据，构建了钛基合金的杨氏模量、硬度和热加工能力的机器学习（ML）模型。在模型中，根据成分变化和扩散耦合的纳米压痕数据，高通量地重新评估了相互扩散和机械性能数据。然后，在互动循环中筛选出具有单体心立方（BCC）相的钛-（22±0.5）%铌-（30±0.5）%锆-（4±0.5）%铬（TNZC）合金。实验结果表明，该合金的杨氏模量相对较低，为 (58±4) GPa；纳米硬度较高，为 (3.4±0.2) GPa；显微硬度较高，为 HV (520±5)；抗压屈服强度较高，为 (1220±18) MPa；塑性应变较大，大于 30%；耐干、湿磨损性能优越。这项工作表明，ML 与高通量分析方法相结合，可为加速设计具有所需性能的多组分钛合金提供强有力的工具。此外，研究还表明 TNZC 合金是生物医学应用的理想候选材料。

{"title":"High-throughput studies and machine learning for design of β titanium alloys with optimum properties","authors":"Wei-min CHEN , Jin-feng LING , Kewu BAI , Kai-hong ZHENG , Fu-xing YIN , Li-jun ZHANG , Yong DU","doi":"10.1016/S1003-6326(24)66602-1","DOIUrl":"10.1016/S1003-6326(24)66602-1","url":null,"abstract":"<div><div>Based on experimental data, machine learning (ML) models for Young’s modulus, hardness, and hot-working ability of Ti-based alloys were constructed. In the models, the interdiffusion and mechanical property data were high-throughput re-evaluated from composition variations and nanoindentation data of diffusion couples. Then, the Ti−(22±0.5)at.%Nb−(30±0.5)at.%Zr−(4±0.5)at.%Cr (TNZC) alloy with a single body-centered cubic (BCC) phase was screened in an interactive loop. The experimental results exhibited a relatively low Young’s modulus of (58±4) GPa, high nanohardness of (3.4±0.2) GPa, high microhardness of HV (520±5), high compressive yield strength of (1220±18) MPa, large plastic strain greater than 30%, and superior dry- and wet-wear resistance. This work demonstrates that ML combined with high-throughput analytic approaches can offer a powerful tool to accelerate the design of multicomponent Ti alloys with desired properties. Moreover, it is indicated that TNZC alloy is an attractive candidate for biomedical applications.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 10","pages":"Pages 3194-3207"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Microstructural evolution and deformation mechanisms of superplastic aluminium alloys: A review 超塑性铝合金的微结构演变和变形机制：综述

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-10-01 DOI: 10.1016/S1003-6326(24)66596-9

Guo-tong ZOU , Shi-jie CHEN , Ya-qi XU , Bao-kun SHEN , Yu-jia ZHANG , Ling-ying YE

Aluminium alloy is one of the earliest and most widely used superplastic materials. The objective of this work is to review the scientific advances in superplastic Al alloys. Particularly, the emphasis is placed on the microstructural evolution and deformation mechanisms of Al alloys during superplastic deformation. The evolution of grain structure, texture, secondary phase, and cavities during superplastic flow in typical superplastic Al alloys is discussed in detail. The quantitative evaluation of different deformation mechanisms based on the focus ion beam (FIB)-assisted surface study provides new insights into the superplasticity of Al alloys. The main features, such as grain boundary sliding, intragranular dislocation slip, and diffusion creep can be observed intuitively and analyzed quantitatively. This study provides some reference for the research of superplastic deformation mechanism and the development of superplastic Al alloys.

铝合金是应用最早、最广泛的超塑性材料之一。本研究旨在回顾超塑性铝合金的科学进展。特别强调了铝合金在超塑性变形过程中的微观结构演变和变形机制。详细讨论了典型超塑性铝合金在超塑性流动过程中晶粒结构、纹理、次生相和空穴的演变。基于聚焦离子束（FIB）辅助表面研究对不同变形机制的定量评估为了解铝合金的超塑性提供了新的视角。对晶界滑动、晶内位错滑动和扩散蠕变等主要特征进行了直观观察和定量分析。这项研究为超塑性变形机理的研究和超塑性铝合金的开发提供了一定的参考。

引用次数: 0

Strengthening mechanism of T8-aged Al−Cu−Li alloy with increased pre-deformation 增加预变形的 T8 时效铝-铜-锂合金的强化机制

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2024-10-01 DOI: 10.1016/S1003-6326(24)66599-4

San-xi DENG , Jin-feng LI , Li WANG , Yue-yan CHEN , Zheng-wu XIANG , Peng-cheng MA , Yong-lai CHEN , Dan-yang LIU

The microstructure evolution and mechanical properties of a T8-aged Al−Cu−Li alloy with increased pre-deformation (0−15%) were investigated, revealing the microstructure−strength relationship and the intrinsic strengthening mechanism. The results show that increasing the pre-deformation levels remarkably improves the strength of the alloy but deteriorates its ductility. Dislocations introduced by pre-deformation effectively suppress the formation of Guinier-Preston (GP) zones and provide more nucleation sites for T1 precipitates. This leads to more intensive and finer T1 precipitates in the samples with higher pre-deformation levels. Simultaneously, the enhanced precipitation of T1 precipitates and inhibited formation of GP zones cause the decreases in number and sizes of θ′ precipitates. The quantitative descriptions of the strength contributions from different strengthening mechanisms reveal that strengthening contributions from T1 and θ′ precipitates decrease with increasing pre-deformation. The reduced diameters of T1 precipitates are primarily responsible for their weakened strengthening effects. Therefore, the improved strength of the T8-aged Al−Cu−Li alloy is mainly attributed to the stronger strain hardening from the increased pre-deformation levels.

研究了预变形增加（0-15%）后 T8 时效铝-铜-锂合金的微观结构演变和力学性能，揭示了微观结构与强度的关系以及内在强化机制。结果表明，增加预变形量可显著提高合金的强度，但会降低其延展性。预变形引入的位错有效地抑制了吉尼尔-普雷斯顿（GP）区的形成，并为 T1 沉淀提供了更多的成核点。这导致预变形程度较高的样品中的 T1 沉淀更密集、更细小。同时，T1析出物析出的增强和 GP 区形成的抑制导致了 θ′析出物数量和尺寸的减小。对不同强化机制的强度贡献的定量描述表明，T1 和 θ′析出物的强化贡献随预变形的增大而减小。T1 析出物直径的减小是其强化效果减弱的主要原因。因此，T8 时效铝-铜-锂合金强度的提高主要归因于预变形水平的提高产生了更强的应变硬化。

{"title":"Strengthening mechanism of T8-aged Al−Cu−Li alloy with increased pre-deformation","authors":"San-xi DENG , Jin-feng LI , Li WANG , Yue-yan CHEN , Zheng-wu XIANG , Peng-cheng MA , Yong-lai CHEN , Dan-yang LIU","doi":"10.1016/S1003-6326(24)66599-4","DOIUrl":"10.1016/S1003-6326(24)66599-4","url":null,"abstract":"<div><div>The microstructure evolution and mechanical properties of a T8-aged Al−Cu−Li alloy with increased pre-deformation (0−15%) were investigated, revealing the microstructure−strength relationship and the intrinsic strengthening mechanism. The results show that increasing the pre-deformation levels remarkably improves the strength of the alloy but deteriorates its ductility. Dislocations introduced by pre-deformation effectively suppress the formation of Guinier-Preston (GP) zones and provide more nucleation sites for <em>T</em>1 precipitates. This leads to more intensive and finer <em>T</em>1 precipitates in the samples with higher pre-deformation levels. Simultaneously, the enhanced precipitation of <em>T</em>1 precipitates and inhibited formation of GP zones cause the decreases in number and sizes of <em>θ′</em> precipitates. The quantitative descriptions of the strength contributions from different strengthening mechanisms reveal that strengthening contributions from <em>T</em>1 and <em>θ′</em> precipitates decrease with increasing pre-deformation. The reduced diameters of <em>T</em>1 precipitates are primarily responsible for their weakened strengthening effects. Therefore, the improved strength of the T8-aged Al−Cu−Li alloy is mainly attributed to the stronger strain hardening from the increased pre-deformation levels.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 10","pages":"Pages 3151-3169"},"PeriodicalIF":4.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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