Article
Engineering, Mechanical
Jing Xu, Bo Guan, Yunchang Xin, Xiao Li, Peidong Wu, Xiaoxu Huang, Qing Liu
Summary: This study systematically investigated the mechanism by which Li additions induce a more homogeneous deformation in Mg. The results showed that the addition of Li dramatically reduced the critical resolved shear stress of pyramidal (c+a) slip, facilitating easy and uniform deformation propagation and improving deformation homogeneity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Hyun Ji Kim, Sang-Hoon Kim, Sang Won Lee, Byoung Gi Moon, Young Min Kim, Jeong Hun Lee, Jonghun Yoon, Hui Yu, Sung Hyuk Park
Summary: The addition of trace amounts of mischmetal to Mg-Al-Zn-Ca-Y alloys can significantly refine the grain structure and improve stability during extrusion, although edge cracks may still form under high-speed extrusion conditions.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
E. P. Silva, R. H. Buzolin, F. Marques, F. Soldera, U. Alfaro, H. C. Pinto
Summary: Mg-Zn-Zr (ZK) alloys have high mechanical strength, but are susceptible to hot cracking due to the formation of low melting point precipitates. Adding rare earths can improve the alloy's performance. Ce-base mischmetal addition can enhance hot rolling behavior, refine grain size, and improve mechanical properties of ZK60 alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Nanoscience & Nanotechnology
Lin Pi, Junjie He, Xinpei Zhang, Yang Chen, Ming Liang, Guangjie Xue, Xiaoyu Yang, Meng Xing, Kai Xiong, Shunmeng Zhang, Yong Mao
Summary: The effect of Li element on the microstructure and texture evolutions of Mg-2Zn alloy sheet during room temperature bending was investigated. The addition of 3 wt.% Li modified the texture of the extruded Mg-2Zn sheet, resulting in improved bendability. The TD-elongated texture distribution provided more efficient deformation modes during bending, releasing the thickness strain more effectively compared to the extruded Mg-2Zn sheet.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Automation & Control Systems
Shanling Han, Zhiyong Li, Zhiyong Wang, Yong Li
Summary: Magnesium alloy sheets are increasingly used in automobiles due to their high specific strength, but traditional joining processes are restricted by their characteristics. Research has been conducted to improve the plasticity of magnesium alloy sheets and develop reliable joining methods for dissimilar sheets. Future trends involve a hybrid of mechanical and solid-state joining processes.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Paula C. de Oliveira, Luciano A. Montoro, Maria Teresa Perez-Prado, Anton Hohenwarter, Roberto B. Figueiredo, Augusta Isaac
Summary: The study found that Nd readily segregates along boundaries in the early stages of severe plastic deformation of the magnesium alloy, while Mn forms nanoparticles and segregates along boundaries. As the strain increases, the hardness of the alloy rapidly increases and saturates, suggesting that the contribution of Mn to the strength of the alloy is minimal.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Mohammadreza Sadrkhah, Milad Aali Majidabad, Mohsen Mesbah, Alireza Sadeghi, Ghader Faraji
Summary: This study examines the effects of adding different amounts of strontium and parallel tubular channel angular pressing (PTCAP) method on as-cast AZ31 magnesium alloy. The results show that adding strontium can significantly refine the grain size and increase the precipitates fraction. Texture analysis demonstrates that adding more strontium reduces the texture intensity. The shear-punch test reveals that the sample with 0.7 wt.% strontium has the highest shear strength and deformation. Corrosion analysis indicates that the PTCAP specimen with 0.7 wt.% strontium has a promising corrosion rate for corrosion-resistant applications.
Article
Materials Science, Multidisciplinary
Shuchang Li, Xi Zhao, Pengcheng Gao, Xingmao Mu, Zhimin Zhang, Shuailing Kan, Fafa Yan
Summary: This paper introduces a novel single-pass severe plastic deformation method called W-shaped channel extrusion (WCE) for the direct manufacturing of magnesium alloy shells. The WCE process constructs a narrow severe plastic deformation gap specially reinforced by a backpressure-shear structure and an asymmetric shear-extrusion section. The experimental results demonstrate remarkable improvements in the mechanical properties of the extruded part, including yield strength, ultimate tensile strength, and elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Nan Xia, Cheng Wang, Yipeng Gao, Zhen-Ming Hua, Chen-Yi Ma, Chun-Feng Du, Hang Zhang, Hong-Min Zhang, Mei-Xuan Li, Min Zha, Hui-Yuan Wang
Summary: In this study, a Mg?1Zn?0.2Zr (ZK10) alloy sheet was prepared by multi-pass hot rolling and annealing, with the addition of dilute Ca to tailor the basal texture and reduce plastic anisotropy. Microstructural characterizations showed improved ductility due to the occurrence of pyramidal c+a slip in the deformed alloys. This work may offer a new strategy for developing wrought Mg alloys with enhanced ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
A. Asgari, H. Delavar, M. Sedighi
Summary: A comprehensive study on the surface integrity of machined AZ91 magnesium alloy is presented, showing the challenges in finish machining and the formation of surface defects and subsurface plastic deformations and micro cracks.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Quan Gao, Weitao Jia, Fangkun Ning, Hongbo Xie, Liwei Lu
Summary: In this paper, a new cyclic rotating-bending (CRB) process is proposed to improve the microstructure of extruded magnesium alloy bars. Finite element simulations are used to investigate the plastic strain distribution and evolution under different CRB processes, and the influence on the microstructure distribution is also clarified. The results show that the plastic strain in the middle radial section of the bars decreases from the surface to the core during CRB deformation, and significant twinning deformation occurs in the surface, promoting grain refinement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Metallurgy & Metallurgical Engineering
M. Kasaeian-Naeini, M. Sedighi, R. Hashemi
Summary: This paper summarizes the use of severe plastic deformation (SPD) techniques to achieve an ultrafine-grained (UFG) structure in magnesium alloys and composites. The effects of various SPD methods on magnesium microstructure, mechanical properties, and corrosion behavior are discussed.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Electrochemistry
Ankur Kumar, F. Khan Md, Sushanta Kumar Panigrahi, Gajanan P. Chaudhari
Summary: The microstructural changes caused by friction stir processing (FSP) on magnesium alloy led to increased hardness but decreased corrosion resistance. This is mainly attributed to iron contamination during FSP and the presence of refined second phase particles which act as active cathodic sites. The role of distributed Mg12Nd precipitates before and after FSP was analyzed from a micro galvanic corrosion perspective.
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
Materials Science, Multidisciplinary
Kiarash Mashoufi, Peiman Garmroodi, Amin Mirzakhani, Ahmad Assempour
Summary: In this study, the CCEE process was used to enhance the mechanical properties of the AZ91 magnesium alloy through microstructural refinement. The results showed a significant improvement in the ultimate tensile strength and elongation of the alloy after the CCEE process, which was confirmed by microhardness measurements.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Multidisciplinary Sciences
Bruno Cesar Noronha Marques de Castilho, Alisson Mendes Rodrigues, Pedro Renato Tavares Avila, Raira Chefer Apolinario, Tamires de Souza Nossa, Magdalena Walczak, Jucielle Veras Fernandes, Romualdo Rodrigues Menezes, Gelmires de Araujo Neves, Haroldo Cavalcanti Pinto
Summary: A hybrid magnetron sputtering process was developed to manufacture nanostructured CrN/Cr1-xAlxN multilayers, which showed improved performance compared to commercial PVD coatings of CrN. Multilayer periodicities in the range of 5 to 10 nm yielded the best tribological performance.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Joao Sartori Moreno, Fabio Faria Conde, Celso Alves Correa, Luiz Henrique Barbosa, Erenilton Pereira da Silva, Julian Avila, Ricardo Henrique Buzolin, Haroldo Cavalcanti Pinto
Summary: This study systematically investigates the correlation between pulsed fluxed core arc welding parameters and the performance of the martensitic clad. The results highlight the importance of selecting the appropriate heat input to achieve the desired performance, even when using a pulsed FCAW procedure. Higher heat input appears to be more advantageous in terms of bead morphology, microstructure formation, residual stress, and hardness.
Article
Materials Science, Multidisciplinary
Pedro Brito, Beatriz Paulinelli, Gabriela de Andra de Oliveira, Haroldo Cavalcanti Pinto
Summary: In this study, low index single crystal surfaces of a binary Fe-Al alloy were oxidized at 700 degrees C in atmospheric air. The composition, microstructure, and texture of the oxide layer were investigated using XPS, TEM, and XRD. The oxidation stresses were determined in situ using synchrotron XRD. The results revealed the presence of a dual layered oxide scale consisting of an inner layer of alpha-Al2O3 and an external layer of alpha-Fe2O3 and alpha-Al2O3. Variations in crystal orientation led to differences in the internal stress distribution in the oxide scales, with compressive stress values of alpha-Al2O3 following (110) > (111) > (100).
Article
Engineering, Mechanical
Joseane M. Giarola, Julian A. Avila, Osvaldo M. Cintho, Haroldo C. Pinto, Marcelo F. de Oliveira, Waldek W. Bose Filho
Summary: Hydrogen embrittlement affects the mechanical properties of steel. This study assessed the influence of hydrogen on the microstructure and fracture toughness of steel welded by friction-stir welding, simulating real-life conditions.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Jefferson Alves Nogueira da Silva, Lorenzo Quaglio, Warlen Alves Monfardini, Juliano Soyama
Summary: This study assesses the effect of different aluminium additions on the microstructure evolution and hardness of powder metallurgy processed titanium aluminides. The results show that larger aluminium additions decrease the sinterability and increase the porosity, leading to lower hardness. However, in alloys with higher aluminium content, despite the higher porosity, improved microstructural homogeneity and the formation of equilibrium phases were achieved.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Bruno Cesar Noronha Marques de Castilho, Felipe de Sousa Mazuco, Alisson Mendes Rodrigues, Pedro Renato Tavares Avila, Raira Chefer Apolinario, Philipp Daum, Fabiana Pereira da Costa, Romualdo Rodrigues Menezes, Gelmires de Araujo Neves, Christian Greiner, Haroldo Cavalcanti Pinto
Summary: The mechanical and wear properties of CrN/CrAlN multilayers were improved by tailoring the experimental conditions of a hybrid magnetron sputtering process. The influence of base layer and different combinations of Cr and CrAl targets on the film growth were investigated. The optimized multilayers showed enhanced hardness, resistance to plastic strain, and wear resistance.
Article
Materials Science, Multidisciplinary
Chaiane M. Caneda, Piter Gargarella, Rudimar Riva, Claudio S. Kiminami, Conrado R. M. Afonso
Summary: Fe76.5Nb8.5B15 (at.%) ultrafine eutectic (UE) coatings were processed by laser cladding, resulting in the formation of nanoscale borides that improved mechanical properties. The wear performance of the coatings and substrate was evaluated, showing different wear mechanisms such as abrasive, adhesive, shearing, and delamination. Oxide particles responsible for tribofilm formation and debris nanoparticles from fracture or breakage were observed. Overall, the Fe-Nb-B ultrafine eutectics laser clad coatings exhibited comparable or superior wear resistance properties to commercial alloys and other materials processed by rapid solidification.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
David D. S. Silva, Alexandre R. C. Nascimento, Guilherme Y. Koga, Guilherme Zepon, Claudio S. Kiminami, Walter J. Botta, Claudemiro Bolfarini
Summary: Ferritic stainless steels armored with borides were tested for their endurance in both abrasive and corrosive environments. It was found that the alloy containing 1.2 wt.% B exhibited the best tribocorrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Pedro Morita Terceiro, Juliano Soyama
Summary: This article investigates the feasibility of preparing a modified 2205 duplex stainless steel with 2.5 wt% boron through powder metallurgy. The effects of boron addition and sintering temperature on microstructure formation, phase transformations, and mechanical properties are studied.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
M. O. A. Ferreira, G. T. L. Teixeira, N. B. Leite, R. V. Gelamo, H. C. Pinto, I. V. Aoki, J. A. Moreto
Summary: This study aims to produce Nb2O5 thin films on the surface of 7050-T7451 aluminium alloy using the reactive sputtering technique, and evaluate their effect on the corrosion resistance through electrochemical techniques. Results show a positive effect of Nb2O5 thin films on the corrosion resistance of the alloy.
EMERGENT MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Marcio Sangali, Alessandra Cremasco, Juliano Soyama, Rubens Caram, Rodrigo J. Contieri
Summary: With the continual advancement of Additive Manufacturing technology, the optimization of microstructure and properties has been made possible. However, the correlation between microstructure and corrosion properties remains unclear, calling for more systematic investigations.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Chemistry, Physical
Jessica Bruna Ponsoni, Mateusz Balcerzak, Walter Jose Botta, Michael Felderhoff, Guilherme Zepon
Summary: This study investigates a multicomponent alloy with C14 Laves phase structures, which demonstrates promising hydrogen storage capabilities at room temperature. The alloy was designed using computational thermodynamic tools and synthesized as a single C14 Laves phase. Experimental results show that the alloy can reversibly absorb and desorb a large amount of hydrogen at room temperature under moderate pressures, with excellent cycling stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
M. O. A. Ferreira, F. E. Mariani, N. B. Leite, R. V. Gelamo, I. V. Aoki, A. de Siervo, H. C. Pinto, J. A. Moreto
Summary: This work investigates the influence of niobium and carbon nanostructured coatings on the corrosion resistance of 316L stainless steel. The coated and uncoated specimens were characterized morphologically and structurally, and the corrosion behavior was assessed using various techniques. The results show that surface treatments improve the corrosion resistance of 316L stainless steel and the coatings act as a protective barrier against corrosion.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Coatings & Films
Qikang Li, Zhuobin Huang, Mingda Xie, Wenting Ye, Qing Zhou, Longshi Qiu, Dan Qian, Haroldo Cavalcanti Pinto, Zhongxiao Song, Haifeng Wang
Summary: This study introduces a VCoNiN weak-nitride-forming system with a unique microstructure, demonstrating superior hardness and low wear rate at room temperature. The exceptional mechanical properties and excellent oxidation resistance of the multi-principal system contribute to the enhanced wear resistance of VCoNiN.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
R. B. Strozi, B. H. Silva, D. R. Leiva, C. Zlotea, W. J. Botta, G. Zepon
Summary: This work presents an effective approach to tune the thermodynamic properties of hydrogen absorption/desorption in body-centered multicomponent alloys. Using computational design and modeling, (TiVNb)100-xCrx alloys with reversible hydrogen absorption/desorption behavior were successfully identified. The experimental results validate the accuracy of the computational approach.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
