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Enhanced adsorption films of dendrimers on mild steel for super protection 树枝状聚合物在低碳钢上的增强吸附膜,具有超强的保护作用
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-11 DOI: 10.1080/02670836.2023.2231261
Minghui Zhong, Yueting Shi, Fang Gao, Hongru Li
ABSTRACT This study employed metronidazole skeletons based on the target branched molecules (TBMs) for achieving efficient anti-corrosion of mild steel in HCl solution. In contrast, the reference linear molecules (RLMs) carrying a single metronidazole framework were also made. The excellent corrosion resistance performance of the target dendrimers for mild steel electrodes in HCl solution was demonstrated. It is shown that the TBMs displayed a superior anti-corrosion effect for mild steel over RLMs in HCl medium at 298 K (at 0.15 mol/L, TBM1, 97.70% versus RLM1, 90.89%). It is shown that the standard Gibbs free energy changes of the adsorption of the TBMs on mild steel surface are below −33 kJ/mol (TBM1, −34.58 kJ/mol), thus an enhanced adsorption film was formed.
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引用次数: 0
Artificial neural network applicability in studying hot deformation behaviour of high-entropy alloys 人工神经网络在高熵合金热变形行为研究中的适用性
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-10 DOI: 10.1080/02670836.2023.2231767
M. R. Zamani, H. Mirzadeh, M. Malekan
The potentials of artificial neural network (ANN) modelling as a potent machine learning approach for investigating the hot deformation behaviour of high-entropy alloys (HEAs) and multi-principal element alloys during thermomechanical processing are assessed and reviewed. Flow stress of CoCrFeNiMn (FCC Cantor alloy), HfNbTaTiZr (BCC refractory alloy), AlCoCuFeNi, and Al x CoCrFeNi alloys is accurately predicted based on the deformation temperature, strain rate, and strain. Moreover, in comparison with the limited experimental dataset, a significantly larger output dataset can be generated by ANN to gain valuable insights such as prediction of flow stress (and whole dynamic recovery/recrystallisation flow curves), elucidating the microstructural mechanisms such as dynamic precipitation reactions, and obtaining hot working parameters (e.g. deformation activation energy) for different ranges of deformation conditions.
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引用次数: 0
Corrosion, fatigue and wear of additively manufactured Ti alloys for orthopaedic implants 骨科植入物用增材制造钛合金的腐蚀、疲劳和磨损
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1080/02670836.2023.2230417
J. Tjandra, E. Alabort, D. Barba, S. Pedrazzini
Additive manufacturing (AM) allows for the fabrication of custom orthopaedic implant devices which have complex geometries and similar mechanical properties to bone. This paper reviews the corrosion, fatigue and wear properties of AM Ti alloys to confirm their safety for use in orthopaedic implants. Specifically, AM Ti lattice geometries are highlighted due to their improved osseointegration and better modulus matching with that of bone, making them an attractive option for more durable implant devices. Finally, the properties of current implants made via AM are compared with that made via conventional manufacturing methods to confirm their overall safety.
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引用次数: 1
An overview on the microstructure and properties of Fe/Ti based dissimilar joints Fe/Ti基异种接头的组织与性能研究进展
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1080/02670836.2023.2229604
T. Prasanthi, C. Sudha, S. Saroja, Contact T. N. Prasanthi
ABSTRACT Joining of Ti and Fe-based alloys is challenging due to the formation of deleterious phases at the interface. Since fusion welding is unsuitable for the purpose, over the years, many solid-state welding techniques have been tried. This review provides a comparison of different solid-state joining methods used for Fe/Ti alloys with focus on the structural transformations in base materials, effect of process parameters on interface microstructure, its evolution and kinetics with thermal aging and structure–property correlation. Structural transformations in diffusion couples (near-equilibrium condition) are compared with those in weldments and a perspective is provided on the role of defects and alloying additions in enhancing/retarding reaction zone formation under both equilibrium and non-equilibrium conditions.
由于在界面处形成有害相,钛基和铁基合金的连接具有挑战性。由于熔焊不适合这种目的,多年来,人们尝试了许多固态焊接技术。本文综述了不同Fe/Ti合金固相连接方法的比较,重点讨论了基体的组织转变、工艺参数对界面微观组织的影响、界面微观组织的演变和热时效动力学以及组织-性能相关性。比较了扩散偶(近平衡条件下)与焊接中的结构转变,并对平衡和非平衡条件下缺陷和添加合金对促进/延缓反应区形成的作用进行了展望。
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引用次数: 1
Microstructure and mechanical properties of suction-cast aluminium–cerium alloys 吸铸铝铈合金的组织与力学性能
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1080/02670836.2023.2228056
R. Gope, S. Mondol, S. Ganguly, A. Mandal
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引用次数: 0
Effects of Ga and In on the properties of Zn-Al sacrificial anodes Ga和In对Zn-Al牺牲阳极性能的影响
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1080/02670836.2023.2231727
Junqi Shao, Fei Yang, Jian Wang, Shenghua Deng, Yongchao Liang, Hong-jin Zhao, Tongsheng Deng, Liang Xu
The influence of Ga and In on the microstructure and electrochemical performance of a Zn-Al alloy was investigated. It was found that the microstructure of the Zn-Al sacrificial anode can be significantly refined by Ga and In, but excess Ga or In leads to segregation. Electrochemical tests show that Zn-0.5Al-0.07 Ga and Zn-0.5Al-0.1In have the most negative OCPs, the corrosion products of which can easily flake off from the corroded surface, showing the good performance of cathodic protection. A small amount of Ga and In contribute to the corrosion of the Zn-Al alloy; however, excess Ga or In can improve the corrosion resistance of the alloy by refining the grains and making the surface of the oxide film form quickly.
{"title":"Effects of Ga and In on the properties of Zn-Al sacrificial anodes","authors":"Junqi Shao, Fei Yang, Jian Wang, Shenghua Deng, Yongchao Liang, Hong-jin Zhao, Tongsheng Deng, Liang Xu","doi":"10.1080/02670836.2023.2231727","DOIUrl":"https://doi.org/10.1080/02670836.2023.2231727","url":null,"abstract":"The influence of Ga and In on the microstructure and electrochemical performance of a Zn-Al alloy was investigated. It was found that the microstructure of the Zn-Al sacrificial anode can be significantly refined by Ga and In, but excess Ga or In leads to segregation. Electrochemical tests show that Zn-0.5Al-0.07 Ga and Zn-0.5Al-0.1In have the most negative OCPs, the corrosion products of which can easily flake off from the corroded surface, showing the good performance of cathodic protection. A small amount of Ga and In contribute to the corrosion of the Zn-Al alloy; however, excess Ga or In can improve the corrosion resistance of the alloy by refining the grains and making the surface of the oxide film form quickly.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":"13 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76607199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure evolution of lean duplex stainless steel produced by a short process 短工艺生产的精益双相不锈钢的组织演变
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1080/02670836.2023.2228104
Xinghai Zhang, Qing Gong, Jiaqi Li, C. Liu, Jingyuan Li
A short process of direct cold rolling of continuous casting billets following solution treatment is proposed, and the effect of cold-rolled reduction on the microstructure evolution and corrosion resistance of lean duplex stainless steel (LDSS) 2101 is investigated. The results show that when the cold-rolled reduction increased to 50%, the strain-induced martensite (SIM) engulfed the austenite along the annealing twin boundaries (TBs). Furthermore, the galvanic corrosion of the martensite and matrix combined with the decreasing fraction of the low-Σ CSL boundaries results in a significant reduction in corrosion resistance at 50% cold-rolled reduction. Additionally, the majority of metastable pits were generated within the ferrite grains and at the α/γ phase boundaries.
提出了一种固溶处理后的连铸坯直接冷轧短工艺,并研究了冷轧还原对贫双相不锈钢(LDSS) 2101组织演变和耐蚀性的影响。结果表明:当冷轧压下率提高到50%时,应变诱发马氏体(SIM)沿退火孪晶边界吞没奥氏体;此外,马氏体和基体的电偶腐蚀以及低-Σ CSL边界的减少导致在50%冷轧压下时耐蚀性显著降低。亚稳坑主要产生于铁素体晶粒内和α/γ相界面。
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引用次数: 0
Substitution of Zn for Cu in Mg–Y–Zn alloys designed for fracturing ball 压裂球用Mg-Y-Zn合金中Zn取代Cu的研究
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1080/02670836.2023.2231260
Guoqiang Xi, Ju Xiong, Yanlong Ma, Jie Chen, Z. Mao, Jiaju Lin, L. Chai, Jingfeng Wang
The microstructure, mechanical properties and degradation behaviour of Mg95Y3Zn2 (MYZ), Mg95Y3Zn1Cu1 (MYZC), and Mg95Y3Cu2 (MYC) (at.-%) alloys have been studied. All the alloys mainly contain α-Mg matrix and LPSO phase. By substituting Zn for Cu, the composition of the LPSO phase transformed from Mg–Y–Zn to Mg–Y–Zn–Cu, and then to Mg–Y–Cu. The ultimate compressive strength is 227, 231 and 238 MPa, respectively. The MYC alloy exhibited much higher degradation rate than MYZC and MYZ alloys. The strong galvanic coupling effect between LPSO phase and the matrix, the grain size refinement and the weak protection from the corrosion product layer are responsible for the high degradation rate. It is suggested that the newly developed MYC alloy is promising for fracturing ball application.
{"title":"Substitution of Zn for Cu in Mg–Y–Zn alloys designed for fracturing ball","authors":"Guoqiang Xi, Ju Xiong, Yanlong Ma, Jie Chen, Z. Mao, Jiaju Lin, L. Chai, Jingfeng Wang","doi":"10.1080/02670836.2023.2231260","DOIUrl":"https://doi.org/10.1080/02670836.2023.2231260","url":null,"abstract":"The microstructure, mechanical properties and degradation behaviour of Mg95Y3Zn2 (MYZ), Mg95Y3Zn1Cu1 (MYZC), and Mg95Y3Cu2 (MYC) (at.-%) alloys have been studied. All the alloys mainly contain α-Mg matrix and LPSO phase. By substituting Zn for Cu, the composition of the LPSO phase transformed from Mg–Y–Zn to Mg–Y–Zn–Cu, and then to Mg–Y–Cu. The ultimate compressive strength is 227, 231 and 238 MPa, respectively. The MYC alloy exhibited much higher degradation rate than MYZC and MYZ alloys. The strong galvanic coupling effect between LPSO phase and the matrix, the grain size refinement and the weak protection from the corrosion product layer are responsible for the high degradation rate. It is suggested that the newly developed MYC alloy is promising for fracturing ball application.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":"40 4 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83191466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural and optical characteristics of NiO films deposited using the PLD technique 用PLD技术沉积NiO薄膜的结构和光学特性
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-05 DOI: 10.1080/02670836.2023.2228573
A. H. Farha
NiO films were deposited on glass and Si(100) substrates by reactive pulsed laser deposition from the Ni target. Nd: YAG laser (1064 nm) was used. The oxygen pressure was between 0.05 and 0.3 Torr. The optimum conditions for a good-quality NiO film are an oxygen pressure of 0.1 Torr and a laser power of 410 mW. Preferred orientation changes from (200) to (220) and D decreases from 27 to ∼9 nm as the temperature increases from 200 to 300°C. The preferred orientation changes into (111), nanoparticles size reduces from 46 to 26 nm and D drops from 27 to 10 nm as laser power increases from 410 to 820 mW. The oxygen pressure is significantly affecting the composition and morphologies of the NiO films. The optical band gap was 3.35 eV.
{"title":"Structural and optical characteristics of NiO films deposited using the PLD technique","authors":"A. H. Farha","doi":"10.1080/02670836.2023.2228573","DOIUrl":"https://doi.org/10.1080/02670836.2023.2228573","url":null,"abstract":"NiO films were deposited on glass and Si(100) substrates by reactive pulsed laser deposition from the Ni target. Nd: YAG laser (1064 nm) was used. The oxygen pressure was between 0.05 and 0.3 Torr. The optimum conditions for a good-quality NiO film are an oxygen pressure of 0.1 Torr and a laser power of 410 mW. Preferred orientation changes from (200) to (220) and D decreases from 27 to ∼9 nm as the temperature increases from 200 to 300°C. The preferred orientation changes into (111), nanoparticles size reduces from 46 to 26 nm and D drops from 27 to 10 nm as laser power increases from 410 to 820 mW. The oxygen pressure is significantly affecting the composition and morphologies of the NiO films. The optical band gap was 3.35 eV.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88944089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced corrosion resistance of the as-cast AZ91 magnesium alloy by micro-addition of the strontium and rare earth elements 微量添加锶和稀土元素提高铸态AZ91镁合金的耐腐蚀性能
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-07-04 DOI: 10.1080/02670836.2023.2228569
Aria Afsharnaderi, M. Lotfpour, A. Bahmani, H. Mirzadeh, M. Malekan, M. Emamy, Mojtaba Fatehi Mollayousef, Soraya Bornay Zonoozi
The synergetic effect of strontium (Sr) and rare earth elements (RE) on the corrosion properties of as-cast Mg–9Al–1Zn alloy were studied. Via the addition of 0.5 wt-% RE and 0.5 wt-% Sr (RE/Sr ratio of 1), a remarkable reduction in the corrosion rate of AZ91 was observed. The reason was found to be related to the decrement of the micro-galvanic corrosion by the modification of the β-Mg17Al12 phase (changing its morphology from semi-continuous to a more spheroid shape) and formation of proper amounts of Al11RE3 and Al4Sr intermetallics. However, the excess RE/Sr ratio impaired the corrosion resistance, which can be related to the micro-galvanic effect by excess amounts of Al11RE3 and Al4Sr intermetallics.
研究了锶(Sr)和稀土元素(RE)对铸态Mg-9Al-1Zn合金腐蚀性能的协同作用。通过添加0.5 wt-% RE和0.5 wt-% Sr (RE/Sr比为1),AZ91的腐蚀速率显著降低。其原因与通过对β-Mg17Al12相进行改性(使其形貌由半连续变为更接近球形)减少微电偶腐蚀以及形成适量的Al11RE3和Al4Sr金属间化合物有关。然而,过量的稀土/锶比降低了材料的耐蚀性,这可能与过量的Al11RE3和Al4Sr金属间化合物的微电效应有关。
{"title":"Enhanced corrosion resistance of the as-cast AZ91 magnesium alloy by micro-addition of the strontium and rare earth elements","authors":"Aria Afsharnaderi, M. Lotfpour, A. Bahmani, H. Mirzadeh, M. Malekan, M. Emamy, Mojtaba Fatehi Mollayousef, Soraya Bornay Zonoozi","doi":"10.1080/02670836.2023.2228569","DOIUrl":"https://doi.org/10.1080/02670836.2023.2228569","url":null,"abstract":"The synergetic effect of strontium (Sr) and rare earth elements (RE) on the corrosion properties of as-cast Mg–9Al–1Zn alloy were studied. Via the addition of 0.5 wt-% RE and 0.5 wt-% Sr (RE/Sr ratio of 1), a remarkable reduction in the corrosion rate of AZ91 was observed. The reason was found to be related to the decrement of the micro-galvanic corrosion by the modification of the β-Mg17Al12 phase (changing its morphology from semi-continuous to a more spheroid shape) and formation of proper amounts of Al11RE3 and Al4Sr intermetallics. However, the excess RE/Sr ratio impaired the corrosion resistance, which can be related to the micro-galvanic effect by excess amounts of Al11RE3 and Al4Sr intermetallics.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":"31 1","pages":"2885 - 2899"},"PeriodicalIF":1.8,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77881119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Materials Science and Technology
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