Article
Chemistry, Physical
Danusa Araujo de Moura, Guilherme Lisboa de Gouveia, Leonardo Fernandes Gomes, Jose Eduardo Spinelli
Summary: The impact of varying Ni contents on the microstructural changes of AlSi10Mg alloy was investigated. The interaction between Si and Al3Ni phases in the alloy was found to be crucial for understanding its properties. Alloys modified with different Ni contents were solidified or remelted, and it was observed that higher Ni contents resulted in lower dendritic spacing and increased proportion of Al3Ni phase. The alloys with the best tensile results and improved surface mechanical properties were identified under specific conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xiaoyi Li, Xujie Gao, Hongguo Lu, Chengcheng Shi, Nana Guo, Fengshi Yin, Guangming Zhu
Summary: By synergistic alloying with Mo and Nb, the AlCrFe2Ni2-based high entropy alloy showed increased volume fraction of the BCC phase and formation of a novel Laves phase with HCP structure. The solidification behavior of the alloys varied considerably with the increase of Mo and Nb content, affecting the alloy's structure and performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
P. X. Yan, J. Chang, W. L. Wang, X. N. Zhu, M. J. Lin, B. Wei
Summary: The liquid CoCrFeNiMo0.8 high entropy alloy (HEA) undergoes undercooling and solidifies rapidly. The transition from slow lamellar eutectic growth to rapid anomalous eutectic growth is observed, which affects crystal orientation and mechanical properties. The growth mechanism transition is due to independent nucleation and cooperative branched growth of the two eutectic phases. The structural refinement and increase in volume fraction of anomalous eutectic contribute to the improved hardness, compression strength, and ductility of the alloy.
Article
Materials Science, Coatings & Films
Yang Lan, Yingbo Peng, Yong Zhang, Wei Zhang, Wenfei Yang, Andong Wang, Weijie Fan, Liangjun Zhou, Yuan Gao, Qingyuan Ma
Summary: This study investigates the solidification behaviors, microstructures, mechanical properties, and strengthening mechanisms of high-entropy alloy coatings prepared by different laser melting deposition methods. The results show that the different preparation methods lead to distinct microstructures and consequent differences in mechanical properties.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Aicha S. Lemine, Farah M. El-Makaty, Hana A. Al-Ghanim, Khaled M. Youssef
Summary: This study investigates the effect of graphene nanosheets on the thermoelectric properties of Bi0.4Sb1.6Te3 alloy. The nanocomposites were synthesized using high-energy ball milling and SPS sintering techniques. The results show that the nanocomposites exhibit improved thermoelectric performance and output power.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Sandeep Jain, L. Naveen, Vinod Kumar, Sumanta Samal
Summary: The present study aims to understand the solidification pathways of novel Al-rich multicomponent alloys with ultrafine eutectic with micron-scale dendrite. Four eutectic alloys Al-Cu-X (X = Ni1.5, Si5, Ni1.5 and Si5) have been designed with the help of thermodynamic simulation using the thermo-calc software, followed by synthesis by solidification processing technique. The microstructure of the studied alloys reveals the presence of dendrite phases and eutectic phase mixtures, bimodal eutectics, peritectic phase and ternary eutectics mixture (L -> alpha-Al + Al7Cu4Ni + beta-Si). Based on these results a quasi-peritectic reaction (L + Al7Cu4Ni -> alpha-Al + Al2Cu) has been proposed for AlCuNi1.5 alloy which has confirmed with the DSC results. With the addition of Ni and Si, the tensile strength and hardness of these alloys increases to 336 MPa and 188.84 HV from 231 MPa and 134.2 HV respectively. The AlCuNi1.5Si5 alloy have better wear resistance (3.40 cm3) as compared to other alloys.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Umair Ali, Hamza Khan, Muhammad Aamir, Khaled Giasin, Numan Habib, Muhammad Owais Awan
Summary: This study found that doping Bismuth into SAC305 can effectively refine microstructure, suppress the growth of intermetallic compounds, and improve mechanical properties. The best performance was observed with 3% Bismuth doping, which also resulted in a decrease in the melting temperature.
Article
Nanoscience & Nanotechnology
X. Wang, W. Zhai, J. Y. Wang, B. Wei
Summary: The solidification process of high-entropy FeCoNi2Al0.9 alloy was modulated using 20 kHz power ultrasound with a maximum amplitude of 13 μm. The eutectic structures were composed of L12 and B2 phases growing synergistically by the K-S relationship. Increasing the ultrasound amplitude resulted in refined eutectic cell width and regular lamellar spacing, increased proportion of strictly semi-coherent L12/B2 interfaces, and suppressed solute concentration fluctuation in each eutectic phase. The steady-state cavitation and acoustic flow had a significant influence on the evolution of the eutectic microstructure. The alloy exhibited increased yield strength, ultimate strength, and total elongation compared to statically solidified alloy, providing an effective approach to improve the mechanical properties and overcome the strength-ductility trade-off in high-entropy alloys with eutectic structures.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Xiaoming Liu, Jianbin Wang, Xinbo Shi, Yuhao Jia, Linxiang Liu, Junjie Li, Feng He, Zhijun Wang, Jincheng Wang
Summary: The addition of minor metal and metalloid elements in multi-component alloys can improve their mechanical properties. In this study, the effect of silicon content on the microstructure and mechanical properties of multi-component alloys was investigated. The results showed that the alloys with silicon addition exhibited improved strength and ductility after thermal mechanical treatment, making them promising candidates for applications in wear, corrosion, and oxidation resistance fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Maressa Gandolfi, Marcella Gaute Cavalcante Xavier, Leonardo Fernandes Gomes, Rodrigo Andre Valenzuela Reyes, Amauri Garcia, Jose Eduardo Spinelli
Summary: This study investigated the effect of microstructure on the tensile properties of AlSi10Mg alloys produced by transient directional solidification, highlighting the impact of variations in cooling rate and magnesium content. It was found that higher magnesium content led to smaller secondary dendritic spacing and increased presence of Mg2Si phase. Control of cooling rate and dendritic refinement played a crucial role in balancing the tensile properties of different alloys.
Article
Materials Science, Multidisciplinary
Ruirun Chen, Yangli Liu, Xiang Xue, Hongze Fang, Yingmei Tan, Hongzhi Cui
Summary: After directional heat treatment (DHT) at 1730 K, DS Ti44Al6Nb1Cr2V alloy exhibited straight columnar grain growth, significant changes in B2 phase morphology, and improved mechanical properties. The ultimate tensile strength and total strain increased by 21% and 33%, respectively, compared to the untreated alloy. The DHT process resulted in reduced residual B2 phases and improved fracture behavior with the generation of stacking faults in lamellar gamma phases.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Janusz Kozana, Aldona Garbacz-Klempka, Marcin Piekos, Malgorzata Perek-Nowak, Pawel Palka
Summary: Investigations were conducted on copper-tin alloys with nickel and titanium additions to maintain or improve their properties under limited fractions of critical elements. The presence of titanium reduced columnar crystals and led to precipitation of intermetallic phases in interdendritic regions. Bronze with titanium additions showed increased hardness and decreased elongation, while CuSnNi bronze showed increased hardness and ultimate tensile strength with reduced elongation when 0.2 wt.% titanium was added. Higher titanium additions further increased hardness, slightly decreased tensile strength, and significantly reduced elongation.
Article
Materials Science, Multidisciplinary
Zhenwei Gong, Jianfeng Wang, Yufeng Sun, Shijie Zhu, Liguo Wang, Shaokang Guan
Summary: The microstructure and compression mechanical properties of sub-rapidly solidified Mg-Zn-Y-Nd alloy cylinders with diameters of 2-8 mm prepared by step-copper mold casting were investigated. The study showed that the 2mm sample exhibited the highest ultimate fracture strength and largest plasticity, attributed to the activation of non-basal slips at the later stage of deformation, indicating that sub-rapid solidification technique could be a promising way to improve the mechanical properties of Mg alloys.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Zhanghua Gan, Qian Ni, Yuanyuan Huang, Yin Su, Yuehui Lu, Chuandong Wu, Jing Liu
Summary: In this study, Al-14.5Si alloys were obtained through super-gravity solidification and cold-rolling, and the influence of annealing time on the microstructure and mechanical properties of the alloys was investigated. The results showed that the presence of submicron eutectic Si in the alloys obtained by super-gravity solidification enabled the conventional cold-rolling, resulting in high elongation. After cold-rolling, the yield strength of the alloys was significantly enhanced due to the high dislocation density. The coarsening of eutectic Si during annealing decreased the yield strength, while the elimination of internal stress and lattice distortion during annealing enhanced the elongation.
Article
Nanoscience & Nanotechnology
H. Moshaver, M. Haddad Sabzevar, M. Mazinani, M. Mahmoudi
Summary: The addition of bismuth (Bi) can improve the microstructure and mechanical properties of magnesium alloys, but a higher Bi content can decrease the workability and formability of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Saeed Farahany, Hamidreza Ghandvar, Nur Azmah Nordin, Ali Ourdjini
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2017)
Article
Thermodynamics
Hassan Jafari, Maryam Khalilnezhad, Saeed Farahany
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2017)
Article
Engineering, Mechanical
Hamidreza Ghandvar, Saeed Farahany, Mohd Hasbullah Idris
TRIBOLOGY TRANSACTIONS
(2018)
Article
Automation & Control Systems
Mehdi Hourmand, Ahmed A. D. Sarhan, Saeed Farahany, Mohd Sayuti
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2019)
Article
Thermodynamics
Saeed Farahany, Nur Azmah Nordin, Hamidreza Ghandvar
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2020)
Article
Materials Science, Multidisciplinary
Saeed Farahany, Hamidreza Ghandvar, Mansour Bozorg, Azmah Nordin, Ali Ourdjini, Esah Hamzah
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
L. Hai Tat, H. R. Bakhsheshi-Rad, E. Hamzah, M. H. Cho, A. Mostafa, S. Farahany
MATERIALS SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Physical
Hamidreza Ghandvar, Saeed Farahany, Tuty Asma Abu Bakar
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Nanoscience & Nanotechnology
Abdollah Bahador, Junko Umeda, Ridvan Yamanoglu, Tuty Asma Abu Bakar, Katsuyoshi Kondoh
Summary: Fully dense powder metallurgy (PM) Ti-4Fe-0.2O-3Cu-0.4Si alloy was produced using spark plasma sintering (SPS) and hot extrusion to develop an inexpensive high strength dual-phase Ti alloy. The addition of Si solute remarkably enhanced the microstructure stability and yield strength of the alloy at high temperature. The principal strengthening mechanisms were grain refinement and solid solution phenomena, leading to a comparatively higher tensile strength of the alloy compared to conventional Ti-6Al-4V alloy produced by a similar method.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Water Resources
Hala E. Ghannam
Summary: The study found that levels of Fe, Pb, and Mn in the water of the Nile River in the Cairo region exceeded the allowed limits, while Cu and Zn levels were within limits. In fish muscle, Fe and Cu levels were within permissible limits, but Mn, Zn, and Pb exceeded the limits. The study also highlighted the importance of monitoring heavy metal concentrations in aquatic ecosystems and the potential health risks posed by certain metals like Pb to habitual fish eaters.
APPLIED WATER SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Saeed Farahany, Hamidreza Ghandvar, Nur Azmah Nordin
Summary: This study investigated the solidification characteristics of A356.2 and its composites with different reinforcement particles (SiC, Al2O3, ZrO2) with and without adding Bi element. The results showed that the reinforcement particles were successfully embedded in the A356.2 alloy. The addition of reinforcement particles increased the cooling rate and undercooling, while the nucleation temperature of alpha-Al increased slightly. The solidification temperature range and rate increased, but the solidification time decreased. Adding Bi element resulted in the depression of eutectic growth temperature and the refinement of eutectic Si. The solidification kinetics of A356.2 and its composites were found to be identical.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Thermodynamics
Saeed Farahany, Hamidreza Ghandvar
Summary: The effect of adding different percentages of Praseodymium (Pr) on the properties of ADC12 commercial alloy was evaluated. The morphology of Si did not change significantly with the addition of Pr. The mechanical properties showed slight changes after adding 1 mass % Pr. It can be concluded that Pr does not play a significant role in modifying the eutectic Si.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Metallurgy & Metallurgical Engineering
Saeed Farahany, Mustafa Abazari
Summary: This study investigated the effect of heat treatment parameters on the microstructure, defects, and hardness of an Al-16Si-6Cu die-cast alloy. It was found that lower solution treatment temperature and shorter ageing time resulted in lower pore area fraction, smaller pores, and finer primary silicon particles with higher circularity.
INTERNATIONAL JOURNAL OF CAST METALS RESEARCH
(2022)
Proceedings Paper
Engineering, Manufacturing
Nur Azmah Nordin, TutyAsma Abubakar, Esah Hamzah, Saeed Farahany, Ali Ourdjini
ADVANCES IN MATERIAL & PROCESSING TECHNOLOGIES CONFERENCE
(2017)
