Transactions of Nonferrous Metals Society of China最新文献_第3页

Origin of misorientations for fcc→hcp transformation in pure cobalt and its in-situ validation 纯钴中fcc→hcp相变取向偏差的成因及原位验证

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66765-3

Jin-jiang HE , Guo-jin XU , Xing-quan WANG , Jun-feng LUO , Dan LIU , Yong-jun LI , Xin-fu GU

{"title":"Origin of misorientations for fcc→hcp transformation in pure cobalt and its in-situ validation","authors":"Jin-jiang HE , Guo-jin XU , Xing-quan WANG , Jun-feng LUO , Dan LIU , Yong-jun LI , Xin-fu GU","doi":"10.1016/S1003-6326(25)66765-3","DOIUrl":"10.1016/S1003-6326(25)66765-3","url":null,"abstract":"<div><div>The origin of the misorientations after fcc (face-centered cubic) to hcp (hexagonal close-packed) transformation in pure cobalt was elucidated by utilizing the electron backscatter diffraction (EBSD) technique and transformation crystallographic models. It is found the Shoji−Nishiyama orientation relationship during fcc→hcp transformation leads to four hcp variants, characterized by a common misorientation angle of 70.5° with respect to the direction, which is the predominant misorientation observed. Other statistically significant misorientation angles between hcp grains, including 32°, 36°, 38°, 60°, 71° and 86°−91°, are also identified. These newly observed misorientation angles are linked to the microstructure of the fcc matrix at elevated temperatures, with twin structures in the fcc matrix being the primary cause. Furthermore, a novel method is proposed for estimating the fraction of twins in the fcc grains based on misorientation angles between hcp variants, which is found to be consistent with experimental observations. In-situ EBSD observations validate the possible origin of fcc twins from the hcp→fcc transformation.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1532-1542"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280670","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}

引用次数: 0

Creep behavior of powder metallurgy Ni-based superalloys with minor scandium 含少量钪的粉末冶金镍基高温合金的蠕变行为

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66769-0

Li-ming TAN , Lin YE , Heng DONG , Xiao-qiong OUYANG , Xiang-you XIAO , Qi ZENG , Jing-wei CHEN , Lan HUANG , Feng LIU

引用次数: 0

Edge cracking behavior of copper foil in asymmetrical micro-rolling 非对称微轧制中铜箔的边缘开裂行为

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66772-0

Jing-qi CHEN , Lin-yun ZHENG , Wei ZHAO , Zhen-hua BAI , Xue-tong LI , Ri-huan LU , Shou-dong CHEN , Xiang-hua LIU , Hai-tao GAO , Hai-liang YU

{"title":"Edge cracking behavior of copper foil in asymmetrical micro-rolling","authors":"Jing-qi CHEN , Lin-yun ZHENG , Wei ZHAO , Zhen-hua BAI , Xue-tong LI , Ri-huan LU , Shou-dong CHEN , Xiang-hua LIU , Hai-tao GAO , Hai-liang YU","doi":"10.1016/S1003-6326(25)66772-0","DOIUrl":"10.1016/S1003-6326(25)66772-0","url":null,"abstract":"<div><div>The edge crack behavior of copper foil in asymmetrical micro-rolling was studied. The effects of the speed ratio between rolls, grain size and stress state in the deformation zone on edge cracks of the rolled piece in asymmetrical rolling were analyzed. Low plasticity, uneven deformation and longitudinal secondary tensile stress generated in the edge area of the rolled piece during the rolling process are the main causes of edge cracks. The larger the grain size of the rolled piece, the smaller the number of edge cracks and the deeper the expansion depth, and the larger the spacing between cracks under the same rolling reduction. Asymmetrical rolling can effectively increase the rolling reduction at when the copper foil fist shows edge cracks compared to symmetrical rolling. This enhancement is attributed to the shearing stress induced by asymmetrical rolling, which reduces the rolling force and longitudinal secondary tensile stress, and increases the residual compressive stress on the surface of the rolled piece. The edge crack defects of copper foil can be effectively reduced by increasing the speed ratio between the rolls in asymmetrical rolling.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1634-1647"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280674","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}

引用次数: 0

Kinetics of chalcopyrite dissolution in ammonia solution under sealed conditions and controlled redox potential 封闭条件下控制氧化还原电位下黄铜矿在氨溶液中的溶解动力学

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI: 10.1016/S1003-6326(25)66776-8

He-yun SUN , Ren-man RUAN , Jiu-shuai DENG

{"title":"Kinetics of chalcopyrite dissolution in ammonia solution under sealed conditions and controlled redox potential","authors":"He-yun SUN , Ren-man RUAN , Jiu-shuai DENG","doi":"10.1016/S1003-6326(25)66776-8","DOIUrl":"10.1016/S1003-6326(25)66776-8","url":null,"abstract":"<div><div>To provide optimization strategies for chalcopyrite ammonia heap leaching processes, the key factors influencing chalcopyrite ammonia leaching kinetics were investigated under sealed reactor and controlled redox potential at ambient temperature. The results indicated that redox potential, particle size, and pH significantly affected chalcopyrite dissolution rates. The reaction orders with respect to particle size and hydroxyl ion concentration <em>c</em>(OH<sup>−</sup>) were determined to be −2.39 and 0.55, respectively. Temperature exhibited a marginal effect on chalcopyrite dissolution within the range of 25−45 °C. The ammonium carbonate medium proved more favorable for chalcopyrite leaching than ammonium chloride and ammonium sulfate systems. Surface deposits on the residues were identified as porous iron oxides, predominantly hematite and ferrihydrite, which produced diffusion barriers during leaching. Shrinking core model analysis revealed that the second stage of reaction was controlled by product-layer diffusion, which was further confirmed by the low activation energy (10.18 kJ/mol).</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 5","pages":"Pages 1691-1703"},"PeriodicalIF":4.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280667","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}

引用次数: 0

Mechanisms of ductile-to-brittle transition in Sn−3.0Ag−0.5Cu solder alloy at cryogenic temperature 低温下Sn−3.0Ag−0.5Cu钎料合金韧脆转变机理

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI: 10.1016/S1003-6326(24)66748-8

Sheng-li LI , Chun-jin HANG , Qi-long GUAN , Xiao-jiu TANG , Ning ZHOU , Yan-hong TIAN , Wei ZHANG , Dan YU , Ying DING , Xiu-li WANG

{"title":"Mechanisms of ductile-to-brittle transition in Sn−3.0Ag−0.5Cu solder alloy at cryogenic temperature","authors":"Sheng-li LI , Chun-jin HANG , Qi-long GUAN , Xiao-jiu TANG , Ning ZHOU , Yan-hong TIAN , Wei ZHANG , Dan YU , Ying DING , Xiu-li WANG","doi":"10.1016/S1003-6326(24)66748-8","DOIUrl":"10.1016/S1003-6326(24)66748-8","url":null,"abstract":"<div><div>The inherent brittle behavior and ductile-to-brittle transition (DBT) mechanism of Sn−3.0Ag−0.5Cu (SAC305) solder alloy at the liquid nitrogen temperature (LNT, 77 K) were investigated through uniaxial tensile experiments conducted at different temperatures. Dynamic recovery and recrystallization of SAC305 solder alloy at room temperature (RT, 293 K) activate a softening process. Conversely, intersecting and none-intersecting deformation twins, embedded in body-centered tetragonal Sn, enhance tensile strength and stabilize strain hardening rate, while suppressing the elongation of the alloy at LNT. The irreconcilable velocity difference between twin thickening (~8 µm/s) and dislocation slip (~4 µm/s) results in premature brittle fracture, during the linear hardening and DBT. Moreover, the secondary phases degrade the mechanical property of SAC305 solder alloy, and micro-cracks appear between Cu<sub>6</sub>Sn<sub>5</sub> and Ag<sub>3</sub>Sn in the eutectic matrix.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 4","pages":"Pages 1281-1291"},"PeriodicalIF":4.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868114","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}

引用次数: 0

Thin layers of Fe-doped ZnO deposited by spin-coating for electrolysis and photodetector applications 采用自旋镀膜法制备了一种用于电解和光电探测器的铁掺杂ZnO薄膜

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI: 10.1016/S1003-6326(24)66747-6

Dikra BOURAS , Mamoun FELLAH , Régis BARILLÉ , Amjad IQBAL , Hamadi FOUZIA , Obrosov ALEKSEI , Gamal A. EL-HITI

{"title":"Thin layers of Fe-doped ZnO deposited by spin-coating for electrolysis and photodetector applications","authors":"Dikra BOURAS , Mamoun FELLAH , Régis BARILLÉ , Amjad IQBAL , Hamadi FOUZIA , Obrosov ALEKSEI , Gamal A. EL-HITI","doi":"10.1016/S1003-6326(24)66747-6","DOIUrl":"10.1016/S1003-6326(24)66747-6","url":null,"abstract":"<div><div>The effect of iron concentration on the microstructural and structural properties of ZnO for electrolysis and photodetector applications was investigated. The thin layers of un-doped and doped ZnO with different percentages of Fe (2, 4, and 6 wt.%) were deposited by spin-coating on glass substrates. Sample characterization was done by X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), UV−Vis absorption spectra and X-ray photoelectron spectroscopy (XPS). Structural measurements by XRD showed that all the layers were composed of polycrystallines with a hexagonal Wurtzite structure. Two new peaks were also discovered after the doping process belonging to the Fe<sub>2</sub>O<sub>4</sub> (400) and (440) crystal phase. Morphological analysis showed that the surface roughness values of ZnO layers ranged between 8 and 45 nm. XPS studies confirmed the presence of Fe in 3+ states in ZnO layers. An average transmittance of 90% was measured by UV−Vis in the wavelength range of 200−900 nm. The values of the energy gap (<em>E</em><sub>g</sub>) decreased with an increase in the concentration of Fe. AFM topography results confirmed that ZnO-based thin layers had a relatively uniform surface. The efficiency of these samples has been confirmed for their use in many electrical applications, including photodetectors and electrolysis of contaminated solutions.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 4","pages":"Pages 1262-1280"},"PeriodicalIF":4.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868113","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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Enhanced separation of yttrium, erbium and thulium with P507 induced by complexation kinetics of DTPA DTPA络合动力学诱导P507增强钇、铒和铥的分离

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI: 10.1016/S1003-6326(24)66752-X

Na SUI , Shu-kai MIAO , Hao SHEN , Kai-hui CUI , Jia-qi WANG , Kun HUANG

{"title":"Enhanced separation of yttrium, erbium and thulium with P507 induced by complexation kinetics of DTPA","authors":"Na SUI , Shu-kai MIAO , Hao SHEN , Kai-hui CUI , Jia-qi WANG , Kun HUANG","doi":"10.1016/S1003-6326(24)66752-X","DOIUrl":"10.1016/S1003-6326(24)66752-X","url":null,"abstract":"<div><div>Based on a non-equilibrium kinetic extraction technique, the complexation kinetics of diethylenetriamine- pentaacetic acid (DTPA) with rare earth (RE) ions was investigated with different adding sequences of DTPA. The results indicated that the separation factors of <em>β</em><sub>Tm/Er</sub> and <em>β</em><sub>Y/Er</sub> were higher when adding DTPA at the start of extraction than those before extraction. The extraction order for Y, Er and Tm was Tm>Y>Er. The root of discrepancy in complexation kinetics of Y, Er and Tm ions with DTPA and the enhanced kinetic separation mechanism were elucidated from the forward complex formation and reverse dissociation rates by the stopped-flow spectrophotometric technique. The apparent complexation rate constants began to decrease gradually with the increase of aqueous pH, while increased with increasing DTPA concentration. The emergence of extraction priority order as Tm>Y>Er was verified according to the calculated reaction kinetic constants of Y, Er and Tm at different pH values.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 4","pages":"Pages 1338-1349"},"PeriodicalIF":4.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868118","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}

引用次数: 0

Simultaneous strengthening and toughening of 2014 Al alloy based on precipitation behavior induced by non-isothermal aging 基于非等温时效诱导析出行为的2014铝合金同时强化增韧

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI: 10.1016/S1003-6326(24)66732-4

Peng-wei LI , Xin WANG , An-hui CAI , Hong-zhi ZHOU , Xiao-peng LIANG , Hui-zhong LI

{"title":"Simultaneous strengthening and toughening of 2014 Al alloy based on precipitation behavior induced by non-isothermal aging","authors":"Peng-wei LI , Xin WANG , An-hui CAI , Hong-zhi ZHOU , Xiao-peng LIANG , Hui-zhong LI","doi":"10.1016/S1003-6326(24)66732-4","DOIUrl":"10.1016/S1003-6326(24)66732-4","url":null,"abstract":"<div><div>Non-isothermal aging (NIA) is a composite heat treatment process that involves heating aging, cooling aging, and complex solute precipitation sequences. The precipitation behavior and the strengthening and toughening mechanisms of the 2014 Al alloy during NIA were studied by employing tensile, fatigue crack growth, hardness, and electronic conductivity tests, as well as high-resolution transmission electron microscopy and scanning electron microscopy. The results show that during NIA, the <em>θ′</em> phase exhibits a complex process of nucleation, nucleation and growth, nucleation and growth and coarsening, growth and coarsening, nucleation and growth, and nucleation. NIA treatment imparts a mixed precipitation characteristic on the alloy, which is manifested as coherent precipitates, including GP zones, <em>θ′′</em> phases, small-sized <em>θ′</em> phases, and semi-coherent or non-coherent precipitates such as large-sized <em>θ′</em> phases and equilibrium <em>θ</em> phases. The simultaneous strengthening and toughening of the NIA-treated 2014 Al alloy is caused by the synergistic effects of the particle-shearing mechanism and Orowan bypassing mechanism.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 4","pages":"Pages 1032-1044"},"PeriodicalIF":4.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868123","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}

引用次数: 0

Impact of atomization methods on aluminum alloy powder characteristics and 3D printing performance in laser directed energy deposition process 激光定向能沉积工艺中雾化方式对铝合金粉末特性及3D打印性能的影响

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI: 10.1016/S1003-6326(24)66734-8

Gang RUAN , Yu-dong LIANG , Gan LI , Ying JIN , Xing-gang LI

引用次数: 0

Influence of microstructure uniformity on fracture behavior of magnesium alloy rolling sheet based on slip trace analysis 基于滑移痕迹分析的镁合金轧制板显微组织均匀性对断裂行为的影响

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI: 10.1016/S1003-6326(24)66738-5

Jing TIAN , Jia-fei DENG , Wei LIANG , Xi ZHAO , Xiao-gang WANG

{"title":"Influence of microstructure uniformity on fracture behavior of magnesium alloy rolling sheet based on slip trace analysis","authors":"Jing TIAN , Jia-fei DENG , Wei LIANG , Xi ZHAO , Xiao-gang WANG","doi":"10.1016/S1003-6326(24)66738-5","DOIUrl":"10.1016/S1003-6326(24)66738-5","url":null,"abstract":"<div><div>The nonuniform microstructure of magnesium alloy rolled sheets tends to influence their plastic deformation capacity. This study employed multi-pass restricted rolling to successfully prepare AZ31 magnesium alloy rolled sheets with a uniform microstructure, enhancing their mechanical properties. Quasi-in-situ tensile EBSD was used to investigate the effect of microstructure uniformity on the plastic deformation and fracture behavior of magnesium alloy. The results demonstrate that the nonuniformity of the magnesium alloy microstructure intensifies the strain asynchrony between adjacent grains, leading to relative misalignment and crack formation. Fine grains cannot coordinate the strain within their adjacent coarse grains, resulting in ledge formation at their common grain boundaries. Moreover, low-angle grain boundaries (LAGB) influence fracture behavior, rendering fine grains penetrated by LAGB more susceptible to becoming strain concentration areas that promote intergranular fracture and even transgranular fracture.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 4","pages":"Pages 1122-1136"},"PeriodicalIF":4.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867987","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}

引用次数: 0