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}
Pub Date : 2025-09-01DOI: 10.1016/S1003-6326(25)66853-1
Jia-wei SUN , Shi-hao XU , Yu-chuan HUANG , Lian-mei WU , Guo-hua WU , Wen-xia HU , Fei LI , Wen-cai LIU
The influence of refining flux composition, refining time, refining temperature, and addition amount on the microstructure and mechanical properties of Mg-9Li-3Al-1Zn alloy was investigated with orthogonal experimental design. The flux purification process for Mg-Li alloys was optimized and the most effective ternary flux composition was identified. Results indicate that flux purification significantly mitigates Li loss during smelting by forming a protective surface layer that reduces Li oxidation and evaporation. The optimal flux composition is LiCl:LiF:CaF2 in a 3:1:2 mass ratio, with a flux addition of 3%, refining temperature of 720 °C, and holding time of 10 min. The elongation of alloy improves to 16.2% after refinement, while the enhancement in strength remains marginal.
{"title":"Effects of flux purification on composition, microstructure and mechanical properties of Mg-9Li-3Al-1Zn alloy","authors":"Jia-wei SUN , Shi-hao XU , Yu-chuan HUANG , Lian-mei WU , Guo-hua WU , Wen-xia HU , Fei LI , Wen-cai LIU","doi":"10.1016/S1003-6326(25)66853-1","DOIUrl":"10.1016/S1003-6326(25)66853-1","url":null,"abstract":"<div><div>The influence of refining flux composition, refining time, refining temperature, and addition amount on the microstructure and mechanical properties of Mg-9Li-3Al-1Zn alloy was investigated with orthogonal experimental design. The flux purification process for Mg-Li alloys was optimized and the most effective ternary flux composition was identified. Results indicate that flux purification significantly mitigates Li loss during smelting by forming a protective surface layer that reduces Li oxidation and evaporation. The optimal flux composition is LiCl:LiF:CaF<sub>2</sub> in a 3:1:2 mass ratio, with a flux addition of 3%, refining temperature of 720 °C, and holding time of 10 min. The elongation of alloy improves to 16.2% after refinement, while the enhancement in strength remains marginal.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 2859-2873"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247854","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 : 2025-09-01DOI: 10.1016/S1003-6326(25)66854-3
Shi-min AI , Xiao-ping LIN , Yao-wei GUO , Xu-zhao ZHANG , Da-ran FANG , Lian-wei YANG , Bin WEN
The effect of high pressure on the microstructure and microsegregation of Mg-11Al (mass fraction, %) alloys was studied through experiments and first-principles calculations. The results show that the Al content in the initial solid phase is high owing to the high solute partition coefficient and the large undercooling in the alloys solidified under pressures of 4-6 GPa, and the Al content in the initial solid phase increases with the increase of pressure. Consequently, the total amount of excess solute in the liquid phase in the final solidification stagedecreases with increasing pressure, thus decreasing or suppressing the eutectic transformation. Furthermore, the microstructure of the alloys solidified under pressuresof 5-6 GPais a fine-grained solid solution, consisting of grains with high solubility of Al atoms and grain boundaries with abundant Al solutes. As the pressure increases, the grain boundary doping energy of Al atoms decreases, while their grain boundary segregation energy of Al atoms increases, and the charge density between the Mg—Al (Mg) bonds also rises. Therefore, the stability of the microstructure is improved, and the bond strength of grain boundaries is enhanced.
通过实验和第一性原理计算，研究了高压对Mg-11Al（质量分数，%）合金显微组织和微偏析的影响。结果表明：在4 ~ 6 GPa压力下凝固的合金，由于溶质分配系数高和过冷性大，初始固相Al含量高，且随着压力的增加，初始固相Al含量增加；因此，在最终凝固阶段，液相中过量溶质的总量随着压力的增加而减少，从而减少或抑制了共晶转变。结果表明，在5 ~ 6 gpa2压力下凝固的合金组织为具有高溶解度Al原子的晶粒和具有丰富Al溶质的晶界的细晶固溶体。随着压力的增大，Al原子的晶界掺杂能减小，而Al原子的晶界偏析能增大，Mg - Al （Mg）键之间的电荷密度增大。从而提高了微观组织的稳定性，提高了晶界的结合强度。
{"title":"Effect of high pressure on microstructure and microsegregation of Mg-11Al alloys","authors":"Shi-min AI , Xiao-ping LIN , Yao-wei GUO , Xu-zhao ZHANG , Da-ran FANG , Lian-wei YANG , Bin WEN","doi":"10.1016/S1003-6326(25)66854-3","DOIUrl":"10.1016/S1003-6326(25)66854-3","url":null,"abstract":"<div><div>The effect of high pressure on the microstructure and microsegregation of Mg-11Al (mass fraction, %) alloys was studied through experiments and first-principles calculations. The results show that the Al content in the initial solid phase is high owing to the high solute partition coefficient and the large undercooling in the alloys solidified under pressures of 4-6 GPa, and the Al content in the initial solid phase increases with the increase of pressure. Consequently, the total amount of excess solute in the liquid phase in the final solidification stagedecreases with increasing pressure, thus decreasing or suppressing the eutectic transformation. Furthermore, the microstructure of the alloys solidified under pressuresof 5-6 GPais a fine-grained solid solution, consisting of grains with high solubility of Al atoms and grain boundaries with abundant Al solutes. As the pressure increases, the grain boundary doping energy of Al atoms decreases, while their grain boundary segregation energy of Al atoms increases, and the charge density between the Mg—Al (Mg) bonds also rises. Therefore, the stability of the microstructure is improved, and the bond strength of grain boundaries is enhanced.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 2874-2885"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247855","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 : 2025-09-01DOI: 10.1016/S1003-6326(25)66861-0
Wei GUO , Long-feng LI , Zhen ZHANG , Mi ZHAO , Jin-cheng WANG , Yan-qiang QIAO , Shu-lin LÜ , Shu-sen WU
Metallic glass matrix composites (BMGCs) with compositions of[(Zr0.5Cu0.5)0.925Al0.07Sn0.005]100-xTax (atomic fraction, %, x=3, 5, 7) were successfully prepared via dealloying in metallic melt. The reinforcing phase in these alloys has core-shell hybrid structure with Ta-rich particles as core and B2-CuZr as shell. In this method, the dealloyed Ta from Zr-Ta pre-alloys maintained in solid state and aggregated to form the fine Ta-rich phase in the final products. This effectively decreases the size of Ta-rich phase compared with that prepared via conventional arc-melting, where the Ta-rich phase was formed through dissolving and precipitation. Among the three compositions, [(Zr0.5Cu0.5)0.925Al0.07Sn0.005]95Ta5 showed the highest plastic strain of 11.2%, much higher than that of the arc-melted counterparts (4.3%). Such improvement in mechanical properties was related with the refined core-shell hybrid reinforcing structure, which could hinder the rapid propagation of main shear band more efficiently and cause them to branch and proliferate at the interface.
{"title":"Refinement of core-shell hybrid structure reinforced CuZr-based bulk metallic glass matrix composites via dealloying in metallic melt","authors":"Wei GUO , Long-feng LI , Zhen ZHANG , Mi ZHAO , Jin-cheng WANG , Yan-qiang QIAO , Shu-lin LÜ , Shu-sen WU","doi":"10.1016/S1003-6326(25)66861-0","DOIUrl":"10.1016/S1003-6326(25)66861-0","url":null,"abstract":"<div><div>Metallic glass matrix composites (BMGCs) with compositions of[(Zr<sub>0.5</sub>Cu<sub>0.5</sub>)<sub>0.925</sub>Al<sub>0.07</sub>Sn<sub>0.005</sub>]<sub>100-<em>x</em></sub>Ta<sub><em>x</em></sub> (atomic fraction, %, <em>x</em>=3, 5, 7) were successfully prepared via dealloying in metallic melt. The reinforcing phase in these alloys has core-shell hybrid structure with Ta-rich particles as core and B2-CuZr as shell. In this method, the dealloyed Ta from Zr-Ta pre-alloys maintained in solid state and aggregated to form the fine Ta-rich phase in the final products. This effectively decreases the size of Ta-rich phase compared with that prepared via conventional arc-melting, where the Ta-rich phase was formed through dissolving and precipitation. Among the three compositions, [(Zr<sub>0.5</sub>Cu<sub>0.5</sub>)<sub>0.925</sub>Al<sub>0.07</sub>Sn<sub>0.005</sub>]<sub>95</sub>Ta<sub>5</sub> showed the highest plastic strain of 11.2%, much higher than that of the arc-melted counterparts (4.3%). Such improvement in mechanical properties was related with the refined core-shell hybrid reinforcing structure, which could hinder the rapid propagation of main shear band more efficiently and cause them to branch and proliferate at the interface.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 2988-2999"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247862","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 : 2025-09-01DOI: 10.1016/S1003-6326(25)66863-4
Xu SUN , Wen HU , Li CHEN , Jian-chuan WANG
The effect of W-doping on the structure and properties of TiAlSiN coatings was investigated through scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, and nanoindentation. Tungsten doping in the coatings forms both substitution solid solution of Ti and/or Al in TiAlN and W simple substance. W-addition improves the surface quality of the coatings. Ti0.46Al0.45Si0.09N, Ti0.43Al0.46Si0.08W0.03N, and Ti0.41Al0.46Si0.07W0.06N present similar hardness of (29.1±0.4), (29.7±1.1), and (30.2±1.0) GPa, respectively. During annealing, Ti0.41Al0.46Si0.07W0.06N achieves peak hardness of (35.3±1.0) GPa at 1100 °C, whereas those of Ti0.46Al0.45Si0.09N and Ti0.43Al0.46Si0.08W0.03N are only (33.1±0.8) and (33.9±0.8) GPa at 1000 °C. Furthermore, moderate W-addition (3 at.%) upgrades the oxidation resistance of TiAlSiN. After oxidation at 1000 °C for 10 h, the oxide thicknesses of Ti0.46Al0.45Si0.09N, Ti0.43Al0.46Si0.08W0.03N, and Ti0.41Al0.46Si0.07W0.06N are ~0.70, ~0.52, and ~0.90 μm, respectively.
{"title":"Influence of W-doping on microstructure, mechanical and thermal properties of TiAlSiN coatings","authors":"Xu SUN , Wen HU , Li CHEN , Jian-chuan WANG","doi":"10.1016/S1003-6326(25)66863-4","DOIUrl":"10.1016/S1003-6326(25)66863-4","url":null,"abstract":"<div><div>The effect of W-doping on the structure and properties of TiAlSiN coatings was investigated through scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, and nanoindentation. Tungsten doping in the coatings forms both substitution solid solution of Ti and/or Al in TiAlN and W simple substance. W-addition improves the surface quality of the coatings. Ti<sub>0.46</sub>Al<sub>0.45</sub>Si<sub>0.09</sub>N, Ti<sub>0.43</sub>Al<sub>0.46</sub>Si<sub>0.08</sub>W<sub>0.03</sub>N, and Ti<sub>0.41</sub>Al<sub>0.46</sub>Si<sub>0.07</sub>W<sub>0.06</sub>N present similar hardness of (29.1±0.4), (29.7±1.1), and (30.2±1.0) GPa, respectively. During annealing, Ti<sub>0.41</sub>Al<sub>0.46</sub>Si<sub>0.07</sub>W<sub>0.06</sub>N achieves peak hardness of (35.3±1.0) GPa at 1100 °C, whereas those of Ti<sub>0.46</sub>Al<sub>0.45</sub>Si<sub>0.09</sub>N and Ti<sub>0.43</sub>Al<sub>0.46</sub>Si<sub>0.08</sub>W<sub>0.03</sub>N are only (33.1±0.8) and (33.9±0.8) GPa at 1000 °C. Furthermore, moderate W-addition (3 at.%) upgrades the oxidation resistance of TiAlSiN. After oxidation at 1000 °C for 10 h, the oxide thicknesses of Ti<sub>0.46</sub>Al<sub>0.45</sub>Si<sub>0.09</sub>N, Ti<sub>0.43</sub>Al<sub>0.46</sub>Si<sub>0.08</sub>W<sub>0.03</sub>N, and Ti<sub>0.41</sub>Al<sub>0.46</sub>Si<sub>0.07</sub>W<sub>0.06</sub>N are ~0.70, ~0.52, and ~0.90 μm, respectively.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 3020-3029"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248053","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 : 2025-09-01DOI: 10.1016/S1003-6326(25)66858-0
Heng-jun LUO , Hao DENG , Wu-hua YUAN , Wei XIANG , Chang-min LI , Wei-dong YIN , Hui YIN , Zou-yuan XU , Sheng CAO
The microstructure and mechanical properties of the Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy under different strains were investigated through the design of step-shaped die forging. The results indicate that continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) occur in the high strain region. The orientation of the grains produced by CDRX is random and does not weaken the fiber texture. 〈100〉-oriented grains expand gradually with increasing strain, thereby enhancing the strength of {100} texture. Significant anisotropic mechanical properties are observed in the large strain region and analyzed through in-situ tensile experiments. When the loading direction is parallel to the longitudinal (L) direction, strain concentration is observed near the dynamically recrystallized (DRXed) grains and inside grains oriented along 〈100〉, leading to crack initiation. Furthermore, the small angle between the loading direction and the c-axis hinders the activation of prismatic and basal slip, thereby enhancing the strength. When the loading direction is parallel to the short transverse (ST) direction, cracks are initiated not only within grains oriented along 〈100〉, but also at the grain boundaries. Regarding impact toughness, the elongated β grains in the L direction enhance the resistance to crack propagation.
{"title":"Effect of cross-section change on microstructure and properties of quasi β forging of Ti-55511 alloy large-scale components","authors":"Heng-jun LUO , Hao DENG , Wu-hua YUAN , Wei XIANG , Chang-min LI , Wei-dong YIN , Hui YIN , Zou-yuan XU , Sheng CAO","doi":"10.1016/S1003-6326(25)66858-0","DOIUrl":"10.1016/S1003-6326(25)66858-0","url":null,"abstract":"<div><div>The microstructure and mechanical properties of the Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy under different strains were investigated through the design of step-shaped die forging. The results indicate that continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) occur in the high strain region. The orientation of the grains produced by CDRX is random and does not weaken the fiber texture. 〈100〉-oriented grains expand gradually with increasing strain, thereby enhancing the strength of {100} texture. Significant anisotropic mechanical properties are observed in the large strain region and analyzed through in-situ tensile experiments. When the loading direction is parallel to the longitudinal (L) direction, strain concentration is observed near the dynamically recrystallized (DRXed) grains and inside grains oriented along 〈100〉, leading to crack initiation. Furthermore, the small angle between the loading direction and the <em>c</em>-axis hinders the activation of prismatic and basal slip, thereby enhancing the strength. When the loading direction is parallel to the short transverse (ST) direction, cracks are initiated not only within grains oriented along 〈100〉, but also at the grain boundaries. Regarding impact toughness, the elongated <em>β</em> grains in the L direction enhance the resistance to crack propagation.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 2935-2953"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247859","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 : 2025-09-01DOI: 10.1016/S1003-6326(25)66860-9
Bo PENG , Jia LIU , Hui-kun WANG , Xing-run SHAN , Guo-liang LI , Zi-di HANG , Jin-chuan JIE , Ting-ju LI
The Cu/1010 steel bimetal laminated composites (BLCs) were rolled to different thicknesses to investigate the effect of rolling direction and reduction on the microstructure evolution and mechanical properties. The difference of mechanical properties between the Cu and 1010 steel causes different thickness reductions, percentage spread, and cladding ratios. The formation of strong texture induces larger strength of the rolled samples, and as the volume fraction of 1010 steel is larger in Route-A, its strength is consistently greater than that in Route-B. The obstruction of interface to crystal and dislocation slip results in the formation of interface distortion, inducing dislocation density gradient when the rolling reduction is low in Route-A. The slip planes of the Cu and 1010 steel are more prone to suffer the normal strain, while the shear strain of other crystal planes is obviously larger than the normal strain under rolling load near the interface.
{"title":"Effect of rolling direction and reduction on microstructure evolution and mechanical properties of Cu/1010 steel bimetal laminated composites","authors":"Bo PENG , Jia LIU , Hui-kun WANG , Xing-run SHAN , Guo-liang LI , Zi-di HANG , Jin-chuan JIE , Ting-ju LI","doi":"10.1016/S1003-6326(25)66860-9","DOIUrl":"10.1016/S1003-6326(25)66860-9","url":null,"abstract":"<div><div>The Cu/1010 steel bimetal laminated composites (BLCs) were rolled to different thicknesses to investigate the effect of rolling direction and reduction on the microstructure evolution and mechanical properties. The difference of mechanical properties between the Cu and 1010 steel causes different thickness reductions, percentage spread, and cladding ratios. The formation of strong texture induces larger strength of the rolled samples, and as the volume fraction of 1010 steel is larger in Route-A, its strength is consistently greater than that in Route-B. The obstruction of interface to crystal and dislocation slip results in the formation of interface distortion, inducing dislocation density gradient when the rolling reduction is low in Route-A. The slip planes of the Cu and 1010 steel are more prone to suffer the normal strain, while the shear strain of other crystal planes is obviously larger than the normal strain under rolling load near the interface.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 2969-2987"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247861","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 : 2025-09-01DOI: 10.1016/S1003-6326(25)66864-6
Peng PENG , Lin LIU , Lu GAN , Yang-xin YU , Yuan-li XU , Xu-dong ZHANG , Zhi-kun MA , Guo-zhi CHAI
Different from the current measurement methodsfor Young’s modulus of metal materials, the Young’s modulus of intermetallic compounds (IMCs) was obtained by a non-destructive method based on Brillouin light scattering (BLS) in this paper. The single-phase regions of CoSn, CoSn2, Cu3Sn and Cu6Sn5 phases required for BLS test were obtained by applying long-term thermal stabilizationthrough adjusting temperature gradient. The volume fractions of the corresponding phases near the solid-liquid interfacesof the samples were 98.3%, 94.2%, 99.6% and 95.9%, respectively. All the independent elastic coefficients and Young’s moduli of IMCs were obtained by Brillouin scatterometer. The Young’s moduli of CoSn, CoSn2 and Cu3Sn and Cu6Sn5 phases obtained through the present method are 115.0, 101.7, 129.9 and 125.6 GPa, respectively, which are in a good agreement with the previous experimental results. Thus, the effectiveness of BLS in measuring the Young’s moduli of IMCs in bulk alloys is confirmed.
{"title":"Non-destructive measurement of Young’s modulus for intermetallic compound phase through Brillouin light scattering","authors":"Peng PENG , Lin LIU , Lu GAN , Yang-xin YU , Yuan-li XU , Xu-dong ZHANG , Zhi-kun MA , Guo-zhi CHAI","doi":"10.1016/S1003-6326(25)66864-6","DOIUrl":"10.1016/S1003-6326(25)66864-6","url":null,"abstract":"<div><div>Different from the current measurement methodsfor Young’s modulus of metal materials, the Young’s modulus of intermetallic compounds (IMCs) was obtained by a non-destructive method based on Brillouin light scattering (BLS) in this paper. The single-phase regions of CoSn, CoSn<sub>2</sub>, Cu<sub>3</sub>Sn and Cu<sub>6</sub>Sn<sub>5</sub> phases required for BLS test were obtained by applying long-term thermal stabilizationthrough adjusting temperature gradient. The volume fractions of the corresponding phases near the solid-liquid interfacesof the samples were 98.3%, 94.2%, 99.6% and 95.9%, respectively. All the independent elastic coefficients and Young’s moduli of IMCs were obtained by Brillouin scatterometer. The Young’s moduli of CoSn, CoSn<sub>2</sub> and Cu<sub>3</sub>Sn and Cu<sub>6</sub>Sn<sub>5</sub> phases obtained through the present method are 115.0, 101.7, 129.9 and 125.6 GPa, respectively, which are in a good agreement with the previous experimental results. Thus, the effectiveness of BLS in measuring the Young’s moduli of IMCs in bulk alloys is confirmed.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 3030-3042"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247874","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 : 2025-09-01DOI: 10.1016/S1003-6326(25)66870-1
Ying-sheng JIN , Wei SUN , Jian PENG , Zheng-chang SHEN , Hai-sheng HAN , Lei SUN , Yao XIAO , Yuan-jia LUO , Yi CHEN
The size and distribution patterns of bubbles within a laboratory-scale coarse-particle flotation column were examined using a high-speed camera-based dynamic measurement system. The effects of operational parameters such as superficial water velocity, air-flow rate, and frother dosage on bubble-size and distribution characteristics were investigated. This study aims to provide theoretical support for enabling fluidized-bed flotation within coarse-particle flotation columns. The results show that negative pressure for air inspiratory and bubble formation is generated by passing a high-speed jet through a throat, and the greatest number of bubbles are observed under natural inspiratory state at an air-liquid ratio of 1:3-1:2.5. Increasing the air-flow rate transforms the bubble diameter distribution from a peaked distribution to a more uniform distribution. Furthermore, the frother narrows the range of bubble-size distribution. A positive correlation exists between the bubble Sauter diameter and air-flow rate, with the bubble Sauter diameter bearing a negative correlation with the superficial water velocity and frother concentration.
{"title":"Effects of operating parameters on size and distribution of bubbles in coarse-particle flotation column","authors":"Ying-sheng JIN , Wei SUN , Jian PENG , Zheng-chang SHEN , Hai-sheng HAN , Lei SUN , Yao XIAO , Yuan-jia LUO , Yi CHEN","doi":"10.1016/S1003-6326(25)66870-1","DOIUrl":"10.1016/S1003-6326(25)66870-1","url":null,"abstract":"<div><div>The size and distribution patterns of bubbles within a laboratory-scale coarse-particle flotation column were examined using a high-speed camera-based dynamic measurement system. The effects of operational parameters such as superficial water velocity, air-flow rate, and frother dosage on bubble-size and distribution characteristics were investigated. This study aims to provide theoretical support for enabling fluidized-bed flotation within coarse-particle flotation columns. The results show that negative pressure for air inspiratory and bubble formation is generated by passing a high-speed jet through a throat, and the greatest number of bubbles are observed under natural inspiratory state at an air-liquid ratio of 1:3-1:2.5. Increasing the air-flow rate transforms the bubble diameter distribution from a peaked distribution to a more uniform distribution. Furthermore, the frother narrows the range of bubble-size distribution. A positive correlation exists between the bubble Sauter diameter and air-flow rate, with the bubble Sauter diameter bearing a negative correlation with the superficial water velocity and frother concentration.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 9","pages":"Pages 3120-3133"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248057","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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