Article
Materials Science, Multidisciplinary
M. Motallebi Savarabadi, G. Faraji, M. Eftekhari
Summary: The hydrostatic tube cyclic expansion extrusion (HTCEE) process was applied to commercially pure copper tubes to produce ultrafine-grained tubes. After two passes of HTCEE, the tubes exhibited significantly increased strength and hardness while maintaining good ductility. The two-pass processed samples showed a more homogeneous distribution of hardness and mainly exhibited ductile fracture during failure.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Engineering, Civil
M. Eftekhari, G. Faraji, M. Bahrami
Summary: The HTCEC process was used to fabricate relatively long ultrafine-grained copper tubes, resulting in significant enhancements in mechanical properties and microstructure evolution after processing through two passes.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Boxin Wei, Jin Xu, Y. Frank Cheng, Jiajun Wu, Cheng Sun, Zhenyao Wang
Summary: The study showed that the laser shock peening method effectively enhanced the surface mechanical properties of pure copper, with the laser overlap percentage playing a key role in improving surface mechanical properties. A 50% overlap was optimal, with the surface hardness after laser shock peening improving by 47%.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
M. Eftekhari, G. Faraji, M. Bahrami, M. Baniassadi
Summary: HTCEC is introduced as a novel severe plastic deformation technique for producing long and large ultrafine grained tubes with high strength and good ductility. Two passes of HTCEC processing resulted in significant improvements in yield strength, ultimate strength, and microhardness while slightly reducing elongation to failure. Additionally, a more homogeneous microhardness distribution was observed in the two-pass processed tubes.
METALS AND MATERIALS INTERNATIONAL
(2022)
Review
Nanoscience & Nanotechnology
Hamed Mirzadeh
Summary: This overview article summarizes the high strain rate superplasticity achieved through friction stir processing (FSP), emphasizing the importance of microstructural characteristics for superplastic forming operations. It also discusses the effects of main processing parameters on heat input and grain size, as well as recent progress in the application of FSP for processing superplastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Anna Bodyakova, Maksim Tkachev, Georgy Raab, Rustam Kaibyshev, Andrey N. Belyakov
Summary: The effect of severe plastic deformation through ECAE-Conform and cold rolling on the microstructures of Cu-0.1Cr-0.1Zr alloy was investigated. The results showed that an increase in ECAE-Conform strain improved grain refinement and subsequent cold rolling further led to grain size reduction and strengthening. The fraction of ultrafine grains with a size of 160 nm increased with an increase in the number of ECAE-Conform passes, resulting in a higher yield strength of above 550 MPa.
Article
Materials Science, Multidisciplinary
Seyed Moien Faregh, Ghader Faraji, Mahmoud Mosavi Mashhadi, Mohammad Eftekhari
Summary: The study found that the UFG pure copper tube processed by HTCEE method exhibited significant mechanical anisotropy, which can be reduced by the HTCEE process while maintaining low ductility loss.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Mingsai Wang, Yanfei Wang, Qiong He, Wei Wei, Fengjiao Guo, Wuli Su, Chongxiang Huang
Summary: By controlled annealing and cryogenic drawing, we successfully synthesized a pure titanium material with the strength of ultrafine-grained titanium and the ductility of coarse-grained titanium. The microstructure is characterized by fine grains, abundant twins, and high dislocation density, which contribute to both strengthening and work hardening. The activation of FCC phase transformation is facilitated by the high flow stress. The excellent ductility is attributed to the initial texture, fine grains, and the interaction among dislocations, FCC lamellae, and twins.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Seyed Elias Mousavi, Ali Sonboli, Mahmood Meratian, Mohabbat Amirnejad, Seyed Hadi Mohamadi Azghandi, Paul Munroe
Summary: The study shows that low stacking fault energy alloys processed by ECAP can achieve unexpected mechanical properties, with high ductility reaching up to -80% while maintaining good tensile strength. The investigation of alloy microstructure reveals a combination of deformation mechanisms, including slip and twinning, accompanied by grain boundary serration and grain fragmentation. These deformation modes trigger the unexpected mechanical properties in this alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Shokouh Attarilar, Faramarz Djavanroodi, Mahmoud Ebrahimi, Khaled J. Al-Fadhalah, Liqiang Wang, Masoud Mozafari
Summary: This research aimed to investigate the impact of texture and grain size on the biological response of hierarchical structured pure titanium. The study demonstrated that grain refinement can enhance the biological response of the Ti surface and that texture plays a crucial role in cell viability, adhesion, and differentiation. Combined SPD methods for microstructure and texture tailoring show promising potential for improving the next generation of medical implants.
JOURNAL OF BIOMEDICAL NANOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ren-E Dong, Amir Hossein Assari, Saeid Yaghoobi, Maryam Mahmoodi, Sahar Ghaderi
Summary: This study examined the microstructure evolution and thermal properties of Al/Ti composites with different volume fractions of Ti. The results showed that plastic instabilities occurred within the composites, leading to a uniform distribution of Ti fragments in the Al matrix. The grain size of the composites decreased with an increase in Ti content, indicating a gradient in grain size. Furthermore, the thermal properties of the composites increased with temperature but decreased with an increase in passes. However, the thermal conductivity, thermal diffusivity, coefficient of thermal expansion, and specific heat capacity of the composites decreased with an increase in Ti content.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
O. Sitdikov, E. Avtokratova, M. Markushev
Summary: The study revealed that the grain refinement of Al-Mg-based alloy during multidirectional isothermal forging occurs through continuous dynamic recrystallization controlled by nanosized precipitates, resulting in the formation of (ultra) fine grain structure.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Seong-Woo Choi, Jae Suk Jeong, Jong Woo Won, Jae Keun Hong, Yoon Suk Choi
Summary: Cryogenic-temperature rolling (CTR) significantly increases the yield strength of commercially pure titanium, demonstrating twinning-induced grain refinement and dislocation accumulation as the main mechanisms for strengthening. This method provides a way to achieve ultrahigh-strength CP titanium for structural applications requiring high-strength materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Sijia Wang, Guoliang Xie, Jie Yang, Feixiang Liu, Xinhua Liu
Summary: Grain refinement in a nano-scaled Al2O3 dispersion-strengthened Cu alloy occurs during compression distortion. The plastic deformation mechanism of the alloy is investigated by studying the evolution of grain size, dislocation density and distribution, and texture orientation. The compression process is divided into four stages, and the grains split into refined sub-grains due to the pinning effect of nano-scaled Al2O3 particles. The study provides insights into the strengthening mechanism and guidance for the design of Cu alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
J. Horky, K. Bryla, M. Krystian, G. Mozdzen, B. Mingler, L. Sajti
Summary: Mg alloys are suitable for biodegradable osteosynthesis implants, but high degradation rates and low strength values are drawbacks. A lean Mg-Zn-Ca alloy processed by D-ECAP shows desirable mechanical properties and low degradation rate, which can be tailored according to the requirements of the final application.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)