A sustainable approach for recovering battery grade FePO4 and Li2CO3 from Al/F-bearing spent LiFePO4/C powder was proposed, including acid leaching, fluorinated coordination precipitation, homogeneous precipitation, and high-temperature precipitation. Under the optimal conditions, the leaching efficiencies of Li, Fe, P, Al, and F were 97.6%, 97.1%, 97.1%, 72.5%, and 63.3%, respectively. The effects of different parameters on the removal of Al/F impurities were systematically evaluated, indicating about 99.4% Al and 96.4% F in the leachate were precipitated in the form of Na3Li3Al2F12, and their residual concentrations were only 0.0124 and 0.328 g/L, respectively, which could be directly used to prepare battery grade FePO4 (99.68% in purity). Lithium in the Al/F-bearing residue could be extracted through CaCO3-CaSO4 roasting followed by acid leaching, ultimately obtaining 99.87% purity of Li2CO3. The recovery rates of Li and Fe were 96.88% and 92.85%, respectively. An economic evaluation demonstrated that the process was profitable.
{"title":"Regeneration of battery grade FePO4 and Li2CO3 from Al/F-bearing spent LiFePO4/C powder","authors":"Ye-hui-zi WU, Kang-gen ZHOU, Chang-hong PENG, Kui YI, Jing-kun DENG, Zai-rong QIU, Wei CHEN, Ke-jing ZHANG","doi":"10.1016/S1003-6326(25)66897-X","DOIUrl":"10.1016/S1003-6326(25)66897-X","url":null,"abstract":"<div><div>A sustainable approach for recovering battery grade FePO<sub>4</sub> and Li<sub>2</sub>CO<sub>3</sub> from Al/F-bearing spent LiFePO<sub>4</sub>/C powder was proposed, including acid leaching, fluorinated coordination precipitation, homogeneous precipitation, and high-temperature precipitation. Under the optimal conditions, the leaching efficiencies of Li, Fe, P, Al, and F were 97.6%, 97.1%, 97.1%, 72.5%, and 63.3%, respectively. The effects of different parameters on the removal of Al/F impurities were systematically evaluated, indicating about 99.4% Al and 96.4% F in the leachate were precipitated in the form of Na<sub>3</sub>Li<sub>3</sub>Al<sub>2</sub>F<sub>12</sub>, and their residual concentrations were only 0.0124 and 0.328 g/L, respectively, which could be directly used to prepare battery grade FePO<sub>4</sub> (99.68% in purity). Lithium in the Al/F-bearing residue could be extracted through CaCO<sub>3</sub>-CaSO<sub>4</sub> roasting followed by acid leaching, ultimately obtaining 99.87% purity of Li<sub>2</sub>CO<sub>3</sub>. The recovery rates of Li and Fe were 96.88% and 92.85%, respectively. An economic evaluation demonstrated that the process was profitable.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3520-3532"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66880-4
Xi-zao WANG , Tian-jiao LUO , Qiu-yan HUANG , Tian-yu LIU , Ying-ju LI , Ce ZHENG , Shuang GUO , Yuan-sheng YANG
The effect of extrusion temperature on the dynamic recrystallization behavior and mechanical properties of the flame-retardant Mg-6Al-3Ca-1Zn-1Sn-Mn (wt.%) alloy was investigated. The observed dynamic recrystallization mechanisms in the alloy include continuous dynamic recrystallization (CDRX) and particle simulated nucleation (PSN) during hot extrusion. A significant increase in yield strength, from 218 to 358 MPa, representing a 140 MPa increase, is achieved by decreasing the extrusion temperature. The strengthening mechanisms were analyzed quantitatively, with the enhanced strength primarily attributed to grain boundary and dislocation strengthening. The plasticity mechanism was analyzed qualitatively, and the increase in the volume fraction of unDRXed grains caused by the decrease in extrusion temperature leads to an increase in the number of {102} tensile twins during the tensile deformation, resulting in a reduction in plasticity.
{"title":"Effect of extrusion temperature on dynamic recrystallization behavior and mechanical properties of flame-retardant Mg-Al-Ca-Zn-Sn-Mn alloy","authors":"Xi-zao WANG , Tian-jiao LUO , Qiu-yan HUANG , Tian-yu LIU , Ying-ju LI , Ce ZHENG , Shuang GUO , Yuan-sheng YANG","doi":"10.1016/S1003-6326(25)66880-4","DOIUrl":"10.1016/S1003-6326(25)66880-4","url":null,"abstract":"<div><div>The effect of extrusion temperature on the dynamic recrystallization behavior and mechanical properties of the flame-retardant Mg-6Al-3Ca-1Zn-1Sn-Mn (wt.%) alloy was investigated. The observed dynamic recrystallization mechanisms in the alloy include continuous dynamic recrystallization (CDRX) and particle simulated nucleation (PSN) during hot extrusion. A significant increase in yield strength, from 218 to 358 MPa, representing a 140 MPa increase, is achieved by decreasing the extrusion temperature. The strengthening mechanisms were analyzed quantitatively, with the enhanced strength primarily attributed to grain boundary and dislocation strengthening. The plasticity mechanism was analyzed qualitatively, and the increase in the volume fraction of unDRXed grains caused by the decrease in extrusion temperature leads to an increase in the number of {102} tensile twins during the tensile deformation, resulting in a reduction in plasticity.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3272-3287"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66881-6
Yong-heng JIANG , Xin-lei QIU , Zheng-qiang ZHANG , Zi-heng SONG , Sheng-guang DAI , Xue-lei WANG , Chun WU , Chao MENG
With the aim of improving the fatigue properties of Mg alloy welded joints under cyclic loading, the effects of laser bionic treatment and ultrasonic impact bionic treatment on the fatigue crack growth (FCG) behavior of AZ31B Mg alloy TIG-welded joints were studied and compared. The results show that bionic treatment refines the grains on the joint surface and improves the microhardness. In the crack stable growth stage, both bionic samples exhibit a lower FCG rate and a higher FCG resistance. The two bionic treatment methods reduce the probability of crack initiation and partially promote crack deflection, providing a new approach for improving the FCG behavior of welded joints.
{"title":"Effects of different bionic strengthening technologies on fatigue crack growth behavior of AZ31B magnesium alloy TIG-welded joints","authors":"Yong-heng JIANG , Xin-lei QIU , Zheng-qiang ZHANG , Zi-heng SONG , Sheng-guang DAI , Xue-lei WANG , Chun WU , Chao MENG","doi":"10.1016/S1003-6326(25)66881-6","DOIUrl":"10.1016/S1003-6326(25)66881-6","url":null,"abstract":"<div><div>With the aim of improving the fatigue properties of Mg alloy welded joints under cyclic loading, the effects of laser bionic treatment and ultrasonic impact bionic treatment on the fatigue crack growth (FCG) behavior of AZ31B Mg alloy TIG-welded joints were studied and compared. The results show that bionic treatment refines the grains on the joint surface and improves the microhardness. In the crack stable growth stage, both bionic samples exhibit a lower FCG rate and a higher FCG resistance. The two bionic treatment methods reduce the probability of crack initiation and partially promote crack deflection, providing a new approach for improving the FCG behavior of welded joints.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3288-3305"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66885-3
Shuai WANG , Rui ZHANG , Ming JI , Feng-bo SUN , Zi-shuo MA , Qi AN , Lu-jun HUANG , Lin GENG
To assess the high-temperature creep properties of titanium matrix composites for aircraft skin, the TA15 alloy, TiB/TA15 and TiB/(TA15-Si) composites with network structure were fabricated using low-energy milling and vacuum hot pressing sintering techniques. The results show that introducing TiB and Si can reduce the steady-state creep rate by an order of magnitude at 600 °C compared to the alloy. However, the beneficial effect of Si can be maintained at 700 °C while the positive effect of TiB gradually diminishes due to the pores near TiB and interface debonding. The creep deformation mechanism of the as-sintered TiB/(TA15-Si) composite is primarily governed by dislocation climbing. The high creep resistance at 600 °C can be mainly attributed to the absence of grain boundary α phases, load transfer by TiB whisker, and the hindrance of dislocation movement by silicides. The low steady-state creep rate at 700 °Cis mainly resulted from the elimination of grain boundary α phases as well as increased dynamic precipitation of silicides and α2.
{"title":"Improved resistance to creep and underlying mechanisms in TiB/(TA15-Si) composites with network structure","authors":"Shuai WANG , Rui ZHANG , Ming JI , Feng-bo SUN , Zi-shuo MA , Qi AN , Lu-jun HUANG , Lin GENG","doi":"10.1016/S1003-6326(25)66885-3","DOIUrl":"10.1016/S1003-6326(25)66885-3","url":null,"abstract":"<div><div>To assess the high-temperature creep properties of titanium matrix composites for aircraft skin, the TA15 alloy, TiB/TA15 and TiB/(TA15-Si) composites with network structure were fabricated using low-energy milling and vacuum hot pressing sintering techniques. The results show that introducing TiB and Si can reduce the steady-state creep rate by an order of magnitude at 600 °C compared to the alloy. However, the beneficial effect of Si can be maintained at 700 °C while the positive effect of TiB gradually diminishes due to the pores near TiB and interface debonding. The creep deformation mechanism of the as-sintered TiB/(TA15-Si) composite is primarily governed by dislocation climbing. The high creep resistance at 600 °C can be mainly attributed to the absence of grain boundary <em>α</em> phases, load transfer by TiB whisker, and the hindrance of dislocation movement by silicides. The low steady-state creep rate at 700 °Cis mainly resulted from the elimination of grain boundary <em>α</em> phases as well as increased dynamic precipitation of silicides and <em>α</em><sub>2</sub>.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3357-3367"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66893-2
Hong-liang ZHANG , Xin RAO , Chen-yang ZHANG , Jian-hua CHEN , Yang-ge ZHU , Rong WANG , Wei SUN
The ion coordination affinities of the commonly found metal ions were evaluated using DFT calculations. The results indicate that the lowest unoccupied molecular orbital (LUMO) energy of metal ions correlates positively with their binding energies with O(S) ligands, and some metal ions with various valence states also present different affinities. Besides, due to the steric hindrance effects, the mono- and hexa-coordinated metal ions may exhibit different affinities, and the majority of the studied hexa-coordinated metal ions exhibit oxophilicity. These affinity differences perfectly illustrate the activation flotation practice in which the oxyphilic ions are applied to activating oxide minerals, while thiophilic ions are applied to activating sulfide minerals.
{"title":"Ion coordination affinity and its application in mineral flotation","authors":"Hong-liang ZHANG , Xin RAO , Chen-yang ZHANG , Jian-hua CHEN , Yang-ge ZHU , Rong WANG , Wei SUN","doi":"10.1016/S1003-6326(25)66893-2","DOIUrl":"10.1016/S1003-6326(25)66893-2","url":null,"abstract":"<div><div>The ion coordination affinities of the commonly found metal ions were evaluated using DFT calculations. The results indicate that the lowest unoccupied molecular orbital (LUMO) energy of metal ions correlates positively with their binding energies with O(S) ligands, and some metal ions with various valence states also present different affinities. Besides, due to the steric hindrance effects, the mono- and hexa-coordinated metal ions may exhibit different affinities, and the majority of the studied hexa-coordinated metal ions exhibit oxophilicity. These affinity differences perfectly illustrate the activation flotation practice in which the oxyphilic ions are applied to activating oxide minerals, while thiophilic ions are applied to activating sulfide minerals.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3468-3479"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66876-2
Tai-qian MO , Hua-qiang XIAO , Cun-hong YIN , Bo LIN , Xue-jian WANG , Kai MA
1060/7050 Al/Al laminated metal composites (LMCs) with heterogeneous lamellar structures were prepared by accumulative roll bonding (ARB), cold rolling and subsequent annealing treatment. The strengthening mechanism was investigated by microstructural characterization, mechanical property tests and in-situ fracture morphology observations. The results show that microstructural differences between the constituent layers are present in the Al/Al LMCs after various numbers of ARB cycles. Compared with rolled 2560-layered Al/Al LMCs with 37.5% and 50.0% rolling reductions, those with 62.5% rolling reductions allow for more effective improvements in the mechanical properties after annealing treatment due to their relatively high mechanical incompatibility across the interface. During tensile deformation, with the increased magnitude of incompatibility in the 2560-layered Al/Al LMC with a heterogeneous lamellar structure, the densities of the geometrically necessary dislocations (GNDs) increase to accommodate the relatively large strain gradient, resulting in considerable back stress strengthening and improved mechanical properties.
{"title":"Heterogeneous lamellar structure dominated mechanical properties optimization in ARBed Al alloy laminated metal composites","authors":"Tai-qian MO , Hua-qiang XIAO , Cun-hong YIN , Bo LIN , Xue-jian WANG , Kai MA","doi":"10.1016/S1003-6326(25)66876-2","DOIUrl":"10.1016/S1003-6326(25)66876-2","url":null,"abstract":"<div><div>1060/7050 Al/Al laminated metal composites (LMCs) with heterogeneous lamellar structures were prepared by accumulative roll bonding (ARB), cold rolling and subsequent annealing treatment. The strengthening mechanism was investigated by microstructural characterization, mechanical property tests and in-situ fracture morphology observations. The results show that microstructural differences between the constituent layers are present in the Al/Al LMCs after various numbers of ARB cycles. Compared with rolled 2560-layered Al/Al LMCs with 37.5% and 50.0% rolling reductions, those with 62.5% rolling reductions allow for more effective improvements in the mechanical properties after annealing treatment due to their relatively high mechanical incompatibility across the interface. During tensile deformation, with the increased magnitude of incompatibility in the 2560-layered Al/Al LMC with a heterogeneous lamellar structure, the densities of the geometrically necessary dislocations (GNDs) increase to accommodate the relatively large strain gradient, resulting in considerable back stress strengthening and improved mechanical properties.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3203-3217"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66877-4
Yong-xiao WANG , Yang FU , Xiao XU , Hui LI , Wen-dong ZHANG , Rui FENG , Yao-kun PAN , Xiao-li CUI
The microstructure and texture evolutions during extrusion and rolling processes of the 2195 Al-Li alloy were investigated. The EBSD technique was employed to reveal the microscopic evolution mechanisms of different texture components. The findings reveal that the texture evolution is governed by two mechanisms: an overall orientation transformation induced by plastic strain and a localized transformation occurring at the shearing bands within grains. During the rolling process, the extrusion texture components of Ex and Cu evolve into S, and the Bs rotates into the orientations near R-Bs and S. With increasing deformation, the S, Bs, and R-Bs orientations further rotate around the TD axis and disperse into new orientations, forming recrystallized grains. The shearing bands with different initial orientations exhibit similar orientation evolution patterns, all of which evolve from the initial orientation to a series of recrystallization orientations.
{"title":"Texture evolution in extrusion and rolling processes of 2195 Al-Li alloy","authors":"Yong-xiao WANG , Yang FU , Xiao XU , Hui LI , Wen-dong ZHANG , Rui FENG , Yao-kun PAN , Xiao-li CUI","doi":"10.1016/S1003-6326(25)66877-4","DOIUrl":"10.1016/S1003-6326(25)66877-4","url":null,"abstract":"<div><div>The microstructure and texture evolutions during extrusion and rolling processes of the 2195 Al-Li alloy were investigated. The EBSD technique was employed to reveal the microscopic evolution mechanisms of different texture components. The findings reveal that the texture evolution is governed by two mechanisms: an overall orientation transformation induced by plastic strain and a localized transformation occurring at the shearing bands within grains. During the rolling process, the extrusion texture components of Ex and Cu evolve into S, and the Bs rotates into the orientations near R-Bs and S. With increasing deformation, the S, Bs, and R-Bs orientations further rotate around the TD axis and disperse into new orientations, forming recrystallized grains. The shearing bands with different initial orientations exhibit similar orientation evolution patterns, all of which evolve from the initial orientation to a series of recrystallization orientations.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3218-3239"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66894-4
Zheng-hao WANG, Si-yu CHEN, Liang CHEN, Bin LIANG, Dong-mei LUO
An approach for coal-based direct reduction of vanadium-titanium magnetite (VTM) raw ore was proposed. Under the optimal reduction conditions with reduction temperature of 1140 °C, reduction time of 3 h, C-to-Fe molar ratio of 1.2:1, and pre-oxidation temperature of 900 °C, the iron metallization degree is 97.8%. Ultimately, magnetic separation yields an iron concentrate with an Fe content of 76.78 wt.% and efficiency of 93.41%, while the magnetic separation slag has a Ti grade and recovery of 9.36 wt.% and 87.07%, respectively, with a titanium loss of 12.93%. This new strategy eliminates the beneficiation process of VTM raw ore, effectively reduces the Ti content in the iron concentrate, and improves the comprehensive utilization of valuable metals.
{"title":"Enhancing iron and titanium recovery efficiency via coal-based direct reduction of vanadium-titanium magnetite raw ore","authors":"Zheng-hao WANG, Si-yu CHEN, Liang CHEN, Bin LIANG, Dong-mei LUO","doi":"10.1016/S1003-6326(25)66894-4","DOIUrl":"10.1016/S1003-6326(25)66894-4","url":null,"abstract":"<div><div>An approach for coal-based direct reduction of vanadium-titanium magnetite (VTM) raw ore was proposed. Under the optimal reduction conditions with reduction temperature of 1140 °C, reduction time of 3 h, C-to-Fe molar ratio of 1.2:1, and pre-oxidation temperature of 900 °C, the iron metallization degree is 97.8%. Ultimately, magnetic separation yields an iron concentrate with an Fe content of 76.78 wt.% and efficiency of 93.41%, while the magnetic separation slag has a Ti grade and recovery of 9.36 wt.% and 87.07%, respectively, with a titanium loss of 12.93%. This new strategy eliminates the beneficiation process of VTM raw ore, effectively reduces the Ti content in the iron concentrate, and improves the comprehensive utilization of valuable metals.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3480-3492"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66890-7
Chong-yang LIU , Xiao-song JIANG , Hong-liang SUN , Zi-xuan WU , Liu YANG
The novel core-shell SiC@CoCrFeNiMn high-entropy alloy (HEA) matrix composites (SiC@HEA) were successfully prepared via mechanical ball milling and vacuum hot-pressing sintering (VHPS). After sintering, the microstructure was composed of FCC solid solution, Cr23C6 carbide phases, and Mn2SiO4 oxy-silicon phase. The relative density, hardness, tensile strength, and elongation of SiC@HEA composites with 1.0 wt.% SiC were 98.5%, HV 358.0, 712.3 MPa, and 36.2%, respectively. The core-shell structure had a significant deflecting effect on the cracks. This effect allowed the composites to effectively maintain the excellent plasticity of the matrix. As a result, the core-shell SiC@HEA composites obtained superior strength and plasticity with multiple mechanisms.
{"title":"Synergistic enhancement of strength and plasticity in CoCrFeNiMn high-entropy alloys by novel core-shell microstructure design","authors":"Chong-yang LIU , Xiao-song JIANG , Hong-liang SUN , Zi-xuan WU , Liu YANG","doi":"10.1016/S1003-6326(25)66890-7","DOIUrl":"10.1016/S1003-6326(25)66890-7","url":null,"abstract":"<div><div>The novel core-shell SiC@CoCrFeNiMn high-entropy alloy (HEA) matrix composites (SiC@HEA) were successfully prepared via mechanical ball milling and vacuum hot-pressing sintering (VHPS). After sintering, the microstructure was composed of FCC solid solution, Cr<sub>23</sub>C<sub>6</sub> carbide phases, and Mn<sub>2</sub>SiO<sub>4</sub> oxy-silicon phase. The relative density, hardness, tensile strength, and elongation of SiC@HEA composites with 1.0 wt.% SiC were 98.5%, HV 358.0, 712.3 MPa, and 36.2%, respectively. The core-shell structure had a significant deflecting effect on the cracks. This effect allowed the composites to effectively maintain the excellent plasticity of the matrix. As a result, the core-shell SiC@HEA composites obtained superior strength and plasticity with multiple mechanisms.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3428-3442"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/S1003-6326(25)66878-6
Zuo-hong GU , Yun-xuan ZHOU , Jia-xing PENG , Guang-ming HE , Hao LV , Quan DONG , Jun TAN , Xian-hua CHEN , Bin JIANG , Fu-sheng PAN , Jürgen ECKERT
To obtain lightweight multicomponent magnesium alloys with high tensile strength, ductility, and stiffness, two extruded Mg92-5xAl1.5+3xZn3Cu3.5+xCex (x=0.5 and 1, labeled as C0.5 and C1) alloys were designed. The results reveal that the ultimate tensile strength, yield strength (YS), and fracture strain of the C0.5 alloy are simultaneously improved compared to those of the C1 alloy, with values of 346 MPa, 312 MPa, and 11.7%, respectively. This enhancement is primarily attributed to the refinement of numerous secondary phases (micron scale Al3CuCe, micron scale MgZnCu, and nanoscale MgZnCu phases). The calculation of YS shows that the Orowan strengthening and coefficient of thermal expansion mismatch strengthening are the main strengthening mechanisms, and the contribution values of both to the YS are 28 and 70 MPa for C0.5 alloy. In addition, the C0.5 alloy has a greater plasticity than the C1 alloy because the 〈c+a〉 slip system is initiated.
{"title":"Simultaneously enhancing strength, ductility, and stiffness of lightweight multicomponent Mg-Al-Zn-Cu-Ce alloys","authors":"Zuo-hong GU , Yun-xuan ZHOU , Jia-xing PENG , Guang-ming HE , Hao LV , Quan DONG , Jun TAN , Xian-hua CHEN , Bin JIANG , Fu-sheng PAN , Jürgen ECKERT","doi":"10.1016/S1003-6326(25)66878-6","DOIUrl":"10.1016/S1003-6326(25)66878-6","url":null,"abstract":"<div><div>To obtain lightweight multicomponent magnesium alloys with high tensile strength, ductility, and stiffness, two extruded Mg<sub>92-5<em>x</em></sub>Al<sub>1.5+3<em>x</em></sub>Zn<sub>3</sub>Cu<sub>3.5+<em>x</em></sub>Ce<sub><em>x</em></sub> (<em>x</em>=0.5 and 1, labeled as C0.5 and C1) alloys were designed. The results reveal that the ultimate tensile strength, yield strength (YS), and fracture strain of the C0.5 alloy are simultaneously improved compared to those of the C1 alloy, with values of 346 MPa, 312 MPa, and 11.7%, respectively. This enhancement is primarily attributed to the refinement of numerous secondary phases (micron scale Al<sub>3</sub>CuCe, micron scale MgZnCu, and nanoscale MgZnCu phases). The calculation of YS shows that the Orowan strengthening and coefficient of thermal expansion mismatch strengthening are the main strengthening mechanisms, and the contribution values of both to the YS are 28 and 70 MPa for C0.5 alloy. In addition, the C0.5 alloy has a greater plasticity than the C1 alloy because the 〈<em>c</em>+<em>a</em>〉 slip system is initiated.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 10","pages":"Pages 3240-3255"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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