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Hot working behaviour of Ti–8Al–1Mo–1V alloy through the hot compression test 通过热压缩试验观察 Ti-8Al-1Mo-1V 合金的热加工性能
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231223807
G. R. Ebrahimi, F. Zarghani, H. Ezatpour, M. J. Taheri
{"title":"Hot working behaviour of Ti–8Al–1Mo–1V alloy through the hot compression test","authors":"G. R. Ebrahimi, F. Zarghani, H. Ezatpour, M. J. Taheri","doi":"10.1177/02670836231223807","DOIUrl":"https://doi.org/10.1177/02670836231223807","url":null,"abstract":"Hot deformation behaviour of Ti–8Al–1Mo–1V alloy (Ti-811) was investigated through the hot compression tests at the temperatures of 950–1075 °C and at strain rates of 0.001–1 s−1. The flow curves of the Ti-811 alloy were successfully modelled by means of the sinh equation and constitutive equations were proposed for isothermal hot compression of Ti-811 alloy. According to the date of flow curves, the values were calculated for the strain rate sensitivity, stress exponent and activation energy. The amounts of the strain rate sensitivity, stress exponent, and activation energy were calculated as 0.19, 3.95 and 730 kJ mol−1 for α + β region and 0.21, 3.6 and 194 kJ mol−1 for β region, respectively.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"87 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Testing for statistically significant differences in predictions obtained from competing creep models 测试相互竞争的蠕变模型预测结果在统计上的显著差异
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231223583
M. Evans
{"title":"Testing for statistically significant differences in predictions obtained from competing creep models","authors":"M. Evans","doi":"10.1177/02670836231223583","DOIUrl":"https://doi.org/10.1177/02670836231223583","url":null,"abstract":"It is important to be able to predict the creep life and other creep properties of materials used in power plants and aeroengines. Whilst existing studies have compared different creep models using different measures of predictive performance, none have identified whether these differences are real from a statistical significance perspective. This paper proposes several tests based on a review of the literature. These tests were applied to two creep models using failure time data on 2.25Cr–1Mo steel to develop a recommended approach for practitioners to adopt when selecting a creep model. All such tests concluded that the Evans model produced better long-term life predictions using only short-term data, and that this difference was statistically significant at the 5% significance level.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"47 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrosion and adhesion properties of MAO-coated LA91 magnesium alloy MAO 涂层 LA91 镁合金的腐蚀和粘附性能
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231219868
Suleyman Sukuroglu, E. E. Sukuroglu, Y. Totik, Gokhan Gulten, I. Efeoglu, Selcuk Avci
{"title":"Corrosion and adhesion properties of MAO-coated LA91 magnesium alloy","authors":"Suleyman Sukuroglu, E. E. Sukuroglu, Y. Totik, Gokhan Gulten, I. Efeoglu, Selcuk Avci","doi":"10.1177/02670836231219868","DOIUrl":"https://doi.org/10.1177/02670836231219868","url":null,"abstract":"Magnesium–lithium alloy is used in different areas of industry and is known as a super light metallic engineering material. However, the use of these alloys is limited due to their surface properties under extreme loads and aggressive environments. Surface treatments can be applied to these alloys to increase their usage areas and improve their weak surface properties. In this study, the micro-arc oxidation method was applied to improve the surface properties of LA91 alloy. The corrosion and adhesion behaviour of the coated samples were investigated. The lowest corrosion current density in the coatings was obtained under Experiment 3. Experiment 3 has the highest Lc2 value due to the coating thickness and the denser and smaller diameter pores of the functional intermediate layer.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"76 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The microstructure and mechanical properties of Mg-Sn-based alloy processed by differential-thermal equal channel angular pressing 差热等道角压制镁硒基合金的微观结构和力学性能
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231212621
Feifei Guo, Yaqin Li, Tianshui Zhou, GuoFeng Zhang, S. Hu, De-xue Liu
{"title":"The microstructure and mechanical properties of Mg-Sn-based alloy processed by differential-thermal equal channel angular pressing","authors":"Feifei Guo, Yaqin Li, Tianshui Zhou, GuoFeng Zhang, S. Hu, De-xue Liu","doi":"10.1177/02670836231212621","DOIUrl":"https://doi.org/10.1177/02670836231212621","url":null,"abstract":"Numerous studies of equal channel angular pressing (ECAP) considered the sample and mould temperatures as a whole, ignoring their different control effects during ECAP deformation. In this paper, the microstructure and mechanical properties of Mg-Sn-Zn-Zr (TZK) alloys were investigated after ECAP deformation at different mould and sample temperatures. The results revealed that higher mould temperatures controlled the actual deformation temperatures and lower sample temperatures prevented grain growth during preheating. After ECAP deformation at mould temperature of 300 °C and sample temperature of room temperature, the alloy consisted of abundant dynamical recrystallisation grains, with an elongation of 30% and a strength of 251.49 MPa. This study would provide a novel idea for the optimisation of the ECAP process.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"97 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detailed investigation of Mn-substituted Zn ferrites for microwave applications up to 6 GHz 用于 6 GHz 以下微波应用的锰取代锌铁氧体的详细研究
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231217195
Mukhtar Ahmad, Khurshid Amin, Atiq ur Rehman, Abdul Wahab, S. Wabaidur
{"title":"Detailed investigation of Mn-substituted Zn ferrites for microwave applications up to 6 GHz","authors":"Mukhtar Ahmad, Khurshid Amin, Atiq ur Rehman, Abdul Wahab, S. Wabaidur","doi":"10.1177/02670836231217195","DOIUrl":"https://doi.org/10.1177/02670836231217195","url":null,"abstract":"Mn-substituted Zn ferrites with chemical formula Zn1−xMnxFe2O4 (0.0, 0.1, 0.2, 0.3) were synthesised via sol-gel auto-combustion. The structural analysis reveals that tetrahedral lengths decrease while octahedral lengths increase due to strong affinity of large ionic radii Mn for octahedral sites as compared to Zn. Scanning electron microscopy reveals that the grain size of all the ferrites lies in the range 200–250 nm. Hysteresis loops of all samples show the coercivity to be several hundred Oersted, indicating the soft magnetic nature of spinel ferrites. High-frequency parameters like complex permittivity and permeability, direct conductivity and loss tangent were measured against varying frequencies (∼ 6 GHz) for a selected sample.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"94 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation of MnSe/CuO on MWCNTS for synergistic photocatalysis scavenging and antibacterial efficiencies 在 MWCNTS 上制备 MnSe/CuO，实现协同光催化清除和抗菌效率
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231213531
Leila Fatolahi
{"title":"Preparation of MnSe/CuO on MWCNTS for synergistic photocatalysis scavenging and antibacterial efficiencies","authors":"Leila Fatolahi","doi":"10.1177/02670836231213531","DOIUrl":"https://doi.org/10.1177/02670836231213531","url":null,"abstract":"In this study, manganese selenide/copper oxide nanocomposites anchored on multi-walled carbon nanotubes (MnSe/CuO/MWCNTs) were fabricated with different ratios and their characteristic properties were evaluated. Microscopic images show the decoration of CuO on MnSe without changing morphology. UV–Vis analysis indicates that the best optical properties of MnSe/CuO/MWCNT nanomaterials via 2.06 eV as a band gap energy. The photocatalytic ability of the fabricated nanomaterials was evaluated by the decomposition of rhodamine B (RhB) (97.23%) and malachite green (MG) (100.0%) under visible LED irradiation within 45 min. Furthermore, the antibacterial activity of the prepared nanosamples was investigated against Escherichia coli and Staphylococcus aureus strains. The results show that MnSe/CuO/MWCNTs can be used as a stronger antibacterial agent.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"74 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interaction mechanism of elements and second phase characteristics in as-cast Cu–15Ni–8Sn–(1Al–0.1Y) alloy 铸态 Cu-15Ni-8Sn-(1Al-0.1Y) 合金中元素的相互作用机理和第二相特征
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231221399
Shaodan Yang, Yan-jun Zhou, Chaomin Zhang, Ke-xing Song, Ran Yang, Shihao Feng, Juan Du, Shuguang Cao, Lili Xiao, Fei Zhou, Wen-hao Yang, Guoshang Zhang
{"title":"Interaction mechanism of elements and second phase characteristics in as-cast Cu–15Ni–8Sn–(1Al–0.1Y) alloy","authors":"Shaodan Yang, Yan-jun Zhou, Chaomin Zhang, Ke-xing Song, Ran Yang, Shihao Feng, Juan Du, Shuguang Cao, Lili Xiao, Fei Zhou, Wen-hao Yang, Guoshang Zhang","doi":"10.1177/02670836231221399","DOIUrl":"https://doi.org/10.1177/02670836231221399","url":null,"abstract":"In this article, the effects of Al and Y elements on the microstructure and mechanical properties of Cu–15Ni–8Sn alloy were studied. The interaction mechanism between elements is proved by first-principles calculation. The results show that the strength of Cu–15Ni–8Sn–1Al–0.1Y alloy reaches 760 MPa, and the hardness of matrix (α-Cu) and Sn-rich phase (γ) are 292.43 and 341.65 HV, respectively, which are 23.78%, 97.80% and 65.21% higher than those of Cu–15Ni–8Sn alloy, respectively. The formation of a large number of dispersed nano-scale Ni3Al second phase is the main reason for the great improvement of the strength of the alloy. In addition, the solid solution of Al and the formation of the Ni17Y2 phase improve the hardness of the Sn-rich phase.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"73 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Laser powder bed fusion of crack-free 6061Al alloy using nano-sized TiO2 modified powders 使用纳米级 TiO2 改性粉末激光粉末床熔融无裂纹 6061Al 合金
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231212808
Chao Yuan, Rengen Ding, Xiaodong Hou, Qiujuan Guo, Xuexu Gao
{"title":"Laser powder bed fusion of crack-free 6061Al alloy using nano-sized TiO2 modified powders","authors":"Chao Yuan, Rengen Ding, Xiaodong Hou, Qiujuan Guo, Xuexu Gao","doi":"10.1177/02670836231212808","DOIUrl":"https://doi.org/10.1177/02670836231212808","url":null,"abstract":"Growth of coarse columnar grains during solidification easily leads to hot cracking during laser powder bed fusion (LPBF) of Al alloys. This work offers an alternative route to inhibit the formation of coarse columnar grains during LPBF process. The crack-free 6061Al alloy with a refined microstructure was obtained using nano-sized TiO2 modified feedstock powders. After HIPPing, a nearly defect-free sample was obtained with a fracture elongation of 19.5 ± 0.14%. After artificially peak ageing treatment, the TiO2 modified 6061Al alloy fabricated by LPBF exhibits a tensile strength of 336.1 ± 3.5 MPa and the fracture elongation is still 8.1 ± 0.92%. It is believed that the approaches used in this work are also effective for other LPBF fabrication of low-printability Al alloys.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"83 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Ce on microstructure and dynamic compression properties of ZK60 alloy Ce 对 ZK60 合金微观结构和动态压缩性能的影响
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231223803
Chenkun Xu, Zhi Wang, Le Zhou, Yijian Dai, Feng Wang, Weihan Zhang, Ziqi Wei, P. Mao
{"title":"Effect of Ce on microstructure and dynamic compression properties of ZK60 alloy","authors":"Chenkun Xu, Zhi Wang, Le Zhou, Yijian Dai, Feng Wang, Weihan Zhang, Ziqi Wei, P. Mao","doi":"10.1177/02670836231223803","DOIUrl":"https://doi.org/10.1177/02670836231223803","url":null,"abstract":"The Mg–6Zn– xCe–0.6Zr ( x = 1, 2) alloys were subjected to a dynamic compression experiment, and the change in microstructure was noticed and studied. The primary components of two alloys are α-Mg matrix, Mg7Zn3 phase, and (Mg1− xZn x)11Ce phase. The two alloys have grain diameters of 2.8 and 3.2 μm, respectively. The dynamic compressive mechanical characteristics of the two alloys show a positive strain-strengthening effect, with Mg–6Zn–1Ce–0.6Zr alloy having somewhat higher values than Mg–6Zn–2Ce–0.6Zr alloy. At a strain rate of 500 s−1, {10[Formula: see text]2} tensile twin is the dominant deformation mechanism for two alloys, but the Mg–6Zn–2Ce–0.6Zr alloy is more prone to produce {10[Formula: see text]2} tensile twin. With the increase of the strain rate, the dominant deformation mechanism changes from {10[Formula: see text]2} tensile twin to pyramidal slip.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"55 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inspired trifunctional adsorption films of branched molecules on copper surface for protection 用于保护铜表面的支链分子三功能吸附膜的灵感来源
Materials Science and Technology Pub Date : 2024-01-08 DOI: 10.1177/02670836231221918
Yueting Shi, Lingli Chen, Shengtao Zhang, Fang Gao, Xinchao Wang, Hongru Li
{"title":"Inspired trifunctional adsorption films of branched molecules on copper surface for protection","authors":"Yueting Shi, Lingli Chen, Shengtao Zhang, Fang Gao, Xinchao Wang, Hongru Li","doi":"10.1177/02670836231221918","DOIUrl":"https://doi.org/10.1177/02670836231221918","url":null,"abstract":"This study developed a method to realise triple resistant effects of new branched molecules for copper surface in aqueous solution. The adsorption of the studied molecules on copper surface was analysed. The results demonstrate that the copper surface adsorbed by the studied molecules showed super resistance effects on Chlorella sp., Escherichia coli and Staphylococcus aureus. The dramatic corrosive suppression of the branched compounds on copper in 0.5 M H2SO4 solution was revealed by the potentiodynamic polarisation and electrochemical impedance spectroscopy at 298 K. By establishing a simple chemical strategy to construct the branched molecules, the multiple inhibition properties of the target molecular adsorption layers on copper can be controlled on the molecular scale.","PeriodicalId":516293,"journal":{"name":"Materials Science and Technology","volume":"19 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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