Article
Materials Science, Multidisciplinary
Jinwen Cai, Keqin Feng, Yanfang Liu
Summary: The effects of Co on the microstructure and properties of W-Mo-Cu alloys were investigated. It was found that Co had an activation effect on the alloys, increasing their sintering capability and densification degree, but decreasing their electrical conductivity.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Samuel R. Oke, Oluwasegun E. Falodun, Abiodun Bayode, Ufoma S. Anamu, Peter A. Olubambi
Summary: This study developed AlCrFeNi high entropy alloy (HEA) using Thermo-Calc as a design guide and synthesized a novel AlCrFeNi HEA composite with TiO2 reinforcements using mechanical alloying and spark plasma sintering techniques. The study investigated the role of TiO2 reinforcement on the densification behavior, phase changes, microstructure, and properties of AlCrFeNi HEA.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Christian Oliver, Christopher A. Schuh
Summary: In this study, a rapidly sintering ternary Mo-W based alloy was developed using the nanophase separation sintering (NPSS) design criteria. The sintering temperatures were shown to be much lower compared to other refractory alloys. The enhanced sintering was facilitated by transient precipitation and redissolution of a second phase, and the resulting alloy exhibited a fine microstructure with a significant boost in hardness compared to Mo-W alloys produced through other methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Grzegorz Matula, Aleksandra Szatkowska, Krzysztof Matus, Blazej Tomiczek, Miroslawa Pawlyta
Summary: The study fabricated cobalt-chromium-molybdenum alloy samples using the PIM method, obtaining components with good mechanical properties through thermal degradation and sintering.
Article
Materials Science, Ceramics
Luo-Jin Liu, Zhao-Hui Zhang, Xian-Yu Li, Qi Song, Xiao-Tong Jia, Qiang Wang, Tian-Hao Xu, Zhao-Hu Jia, Xing-Wang Cheng
Summary: TiB2 composite ceramics with different amounts of Ti and TiC were fabricated via SPS, and the effects of their addition contents on microstructure and mechanical properties were discussed. Newly formed phases of TiB with a cubic lattice structure were observed in the composite ceramics. An excellent strength of 727 MPa and high toughness of 7.62 MPa m1/2 were achieved in the TiB2 composite ceramic with 30 wt% TiC and 10 wt% Ti additions. The improvements in strength and toughness were attributed to mixed fracture mode, second phase strengthening, and increased energy consumption for crack propagation caused by the newly formed phases and fine TiC particles. Additionally, the significant effects of Ti and TiC addition contents on the densification temperature and mechanical properties of the composite ceramics were determined through ANOVA analysis.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Amrendra Rai, Pooja Rai, Vijay Kumar, Naresh Kumar Singh, Vinay Kumar Singh
Summary: The present research focused on studying the effect of sintering temperature on the physical and mechanical properties of Zn2Mg6SiC composite, finding that the optimal performance was observed at a sintering temperature of 450 degrees Celsius.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Zhenping Guo, Cheng Wang, Xiangyu Ding, Xiangrong Li, Bin Li
Summary: The novel oscillatory sintering method can improve the density and mechanical properties of molybdenum silicon boron alloy, refine the crystal grains, and has certain reference value for the preparation and development of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Jazmina Navarrete-Cuadrado, Tomas Soria-Biurrun, Lorena Lozada-Cabezas, Federico Ibarreta-Lopez, Roberto Martinez-Pampliega, Jose M. Sanchez-Moreno
Summary: TiC-Fe-Cr3C2-Mo and TiC-Fe-Cr3C2-Mo2C powder mixtures were consolidated by liquid phase sintering under different vacuum conditions. Reduced pressure improved densification by enhancing carbothermal reduction of powder oxides and diffusion phenomena. Cermets with fine Mo2C powders showed higher densities due to higher C losses after sintering. Surface oxidation and Ar entrapment in pores were minimized at lower vacuum conditions. Heat treatments could modify the hardness of TiC-Fe-Cr-Mo cermets.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Engineering, Manufacturing
Z. Wang, S. Y. Tang, S. Scudino, Yu P. Ivanov, R. T. Qu, D. Wang, C. Yang, W. W. Zhang, A. L. Greer, J. Eckert, K. G. Prashanth
Summary: A Co-Cr-Mo alloy with predominantly martensitic structure was produced using selective laser melting (SLM), leading to outstanding tensile properties due to its hierarchical microstructure spanning multiple length scales and internal defects.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Yury V. Gamin, Alexander V. Skugorev, Mukhamed M. Karashaev, Tatiana Y. Kin, Sergei P. Galkin, Abdullah Mahmoud Alhaj Ali, Vladimir V. Cheverikin
Summary: The article analyzes the microstructure evolution of Co-Cr-Mo alloy during isothermal forging. Isothermal forging can produce a high-quality microstructure for subsequent deformation processing. The required modes of ingot homogenization are determined through analysis and calculations. Isothermal forging in specific temperature and strain rate conditions allows obtaining a defect-free microstructure for further metal forming methods.
Article
Engineering, Manufacturing
Shoya Aota, Kenta Yamanaka, Manami Mori, Nobuyuki Sasaki, Jerome Adrien, Eric Maire, Damien Fabregue, Akihiko Chiba
Summary: The influence of carbon content on the porosity and microstructure of Co-Cr-Mo alloys was investigated. The results showed that increasing carbon content can enhance the hardness and reduce porosity of the alloys. Moreover, different carbon concentrations also affected the solidification behavior and morphology of the solid-liquid interface.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Marko Sedlacek, Katja Zupancic, Barbara Setina Batic, Borut Kosec, Matija Zorc, Ales Nagode
Summary: This study investigated the effect of heat treatment on the microstructure development and mechanical/tribological properties of Co-Cr-Mo and Co-Cr-W-Mo dental alloys. The results showed that the Co-Cr-Mo alloy exhibited better wear resistance and higher hardness compared to the Co-Cr-W-Mo alloy due to the detachment of carbide particles in the latter. Aging improved the wear resistance of both alloys.
Article
Materials Science, Multidisciplinary
Wentan Zhu, Wensheng Liu, Yunzhu Ma, Qingshan Cai, Jianning Wang, Youteng Duan
Summary: The tungsten alloy/steel composite structure was successfully fabricated using hot isotactic pressing (HIP), resulting in dense base materials with good tensile properties. The co-sintered joint consists of five regions, and further research is needed to understand the formation mechanism of the interfacial structure.
MATERIALS & DESIGN
(2021)
Article
Dentistry, Oral Surgery & Medicine
Larissa Dolfini Alexandrino, Luiz Henrique Martinez Antunes, Andre Luiz Jardini Munhoz, Antonio Pedro Ricomini Filho, Wander Jose da Silva
Summary: This study evaluated the mechanical and surface properties of Co-Cr alloy produced by laser powder bed fusion additive manufacturing technology at different build angles. The results showed that the build angle influenced the flexural strength and microhardness, but had no effect on the surface free energy and surface roughness.
JOURNAL OF PROSTHETIC DENTISTRY
(2023)
Article
Materials Science, Multidisciplinary
W. J. Wang, X. Y. Tan, S. P. Yang, Y. R. Mao, L. M. Luo, X. Y. Zhu, A. Litnovsky, J. W. Coenen, Ch. Linsmeier, Y. C. Wu
Summary: This study investigated the influence of powder characteristics on the densification behavior and microstructure evolution of the W-Cr-Zr alloy during consolidation. It was found that the intermittently mechanical alloyed (IMA) powders exhibited better sintering performance and microstructure compared to the continuously mechanical alloyed (CMA) powders. The IMA powders were able to achieve full densification and homogenization at a low temperature, and the resulting alloy showed excellent anti-oxidation performance.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Engineering, Biomedical
Nooshin Zandi, Banafsheh Dolatyar, Roya Lotfi, Yousef Shallageh, Mohammad Ali Shokrgozar, Elnaz Tamjid, Nasim Annabi, Abdolreza Simchi
Summary: The engineered bilayer scaffolds, composed of gelatin nanofibers and composite hydrogels, show promising potential in accelerating wound healing process. The controlled delivery of growth factors on the bilayer scaffolds enhances wound closure and tissue regeneration. The unique structure of the scaffolds mimics the extracellular matrix, providing a platform for tailored growth factor release and improved adhesion to native tissue.
ACTA BIOMATERIALIA
(2021)
Article
Chemistry, Multidisciplinary
Seyed Abolhassan Hosseini, Shervin Daneshvar e Asl, Manouchehr Vossoughi, Abdolreza Simchi, Mohtada Sadrzadeh
Summary: Incorporating amino-functionalized montmorillonite nanoparticles into chitosan/poly(vinyl alcohol) nanofibers enhances adsorption capacity, thermal stability, and compression resistance, leading to efficient removal of cationic dyes. The nanocomposite membranes with 2 wt% nanofiller exhibit the highest and fastest dye removal rate, surpassing the pristine membranes by at least 20%. Additionally, the adsorption kinetics follow a pseudo-second-order mechanism according to the Langmuir isotherm model, demonstrating a spontaneous chemisorption process.
Article
Nanoscience & Nanotechnology
Mahdi Hasanzadeh Azar, Maryam Mohammadi, Nima Tabatabaei Rezaei, Samaneh Aynehband, Leyla Shooshtari, Raheleh Mohammadpour, Abdolreza Simchi
Summary: The study introduces a room temperature protocol to improve the stability and quantum efficiency of FAPbI(3) perovskite nanocrystals by utilizing excess organic cations and amine ligands for 2D growth. It demonstrates that the resulting QW nanocrystals hold 90% of their PL intensity after 30 days, showing about 8 times more stability compared to QD films and enhanced photoresponsivity in photodetectors. This research sheds light on the development of ambient stable QW nanoparticle perovskite optoelectronic devices.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Mohsen Saeidi, Minjong Lee, Odongo Francis Ngome Okello, Si-Young Choi, Seung Soo Oh, Abdolreza Simchi
Summary: The study investigates the graphitization mechanism of graphitic oxide under ultrafast thermal reduction induced by electromagnetic radiation and Ar+ cation collisions. The prepared spongy graphene structure shows excellent charge storage performance, high electrical conductivity, and stability in multiple applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Behnam Nourmohammadi Khiarak, Majdoddin Mojaddami, Zahra Zamani Faradonbeh, Angelina Olegovna Zekiy, Abdolreza Simchi
Summary: The development of active, durable, cost-effective, and stable electrocatalysts is urgently needed in various industries, including renewable energy systems. This article presents an electrochemical analysis of a nanostructured electrocatalyst based on a Cu-Ni-Fe-Cr-Co alloy with enhanced activity for both oxygen and hydrogen reactions in alkaline medium.
Article
Materials Science, Multidisciplinary
Samaneh Aynehband, Maryam Mohammadi, Rana Poushimin, Mahdi Hasanzadeh Azar, Jean-Michel Nunzi, Abdolreza Simchi
Summary: The type of passivating ligands and the ligand exchange method significantly affect the quality and stability of lead sulfide quantum dot films, and thereby impacting the efficiency of optoelectronic devices. Using organic-inorganic perovskites as exchange agents, the replacement of oleic acid ligands with perovskite ligands enhances the film homogeneity and reduces defects. The application of this method improves the stability and performance of field effect phototransistors, demonstrating its importance for next-generation optoelectronic applications.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Analytical
Mohsen Saeidi, Mohammad Ali Amidian, Sana Sheybanikashani, Hossein Mahdavi, Homayoon Alimohammadi, Leila Syedmoradi, Fatemeh Mohandes, Ali Zarrabi, Elnaz Tamjid, Kobra Omidfar, Abdolreza Simchi
Summary: This study proposes a multilayer nanostructure to improve the accuracy and reliability of cardiac troponin-I (cTnI) electrochemical immunosensors. The nanostructure consists of Fe3O4-COOH labeled anti-cTnI monoclonal antibody and anti-cTnI polyclonal antibody conjugated on Au-Ag nanoparticles, which enhances the performance of the immunosensor through signal amplification and increased surface area.
Article
Chemistry, Physical
Hajar Tohidi, Nahid Maleki-Jirsaraei, Abdolreza Simchi, Fatemeh Mohandes, Zahra Emami, Lorenzo Fassina, Fabio Naro, Bice Conti, Federica Barbagallo
Summary: Myocardial infarction is a major cause of death worldwide. Injectable hydrogels have the potential to revolutionize the treatment of heart diseases. In this study, a thermo-responsive and injectable hydrogel based on conjugated chitosan/poloxamers was developed for cardiac repair. Gold nanoparticles were incorporated to tailor the mechanical properties and electrical signal transmission of the hydrogel. The prepared hydrogel demonstrated reversible phase transition, shear-thinning behavior, and good cytocompatibility. It shows great potential as an injectable biomaterial for cardiac tissue regeneration.
Article
Materials Science, Multidisciplinary
Fatemeh Mohandes, Hamed Dehghani, Shayan Angizi, Arash Ramedani, Banafsheh Dolatyar, Marzieh Ramezani Farani, Klaus Muellen, Abdolreza Simchi
Summary: This study presents a surface-engineered bimodal magnetic-fluorescent material for dual-mode imaging of cancerous tumors. The polymer-coated nanoparticles based on manganese ferrites exhibit strong magnetic moment and photoluminescence emission. The nanoparticles show great biosafety and colloidal stability, and they can effectively image tumor tissues both in vitro and in vivo.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Samaneh Aynehband, Joshua N. Arthur, Maryam Mohammadi, Jean -Michel Nunzi, Soniya D. Yambem, Abdolreza Simchi
Summary: Phototransistors based on blended MAPbI3 perovskite nanocrystals and P3HT exhibit higher absorption coefficient and unique optical properties, resulting in faster response time and more stable photoresponse compared to pure P3HT phototransistors. The optimized device with a 2:1 weight ratio of MAPbI3 nanocrystals to P3HT achieves an ILIGHT/IDARK ratio of 123, which is 63% higher than in pure P3HT phototransistors. These phototransistors may have potential applications as tunable photosensors due to their ease of fabrication and high sensitivity.
ORGANIC ELECTRONICS
(2023)
Article
Optics
Mahdi Hasanzadeh Azar, Samaneh Aynehband, Habib Abdollahi, Homayoon Alimohammadi, Nooshin Rajabi, Shayan Angizi, Vahid Kamraninejad, Razieh Teimouri, Raheleh Mohammadpour, Abdolreza Simchi
Summary: Recently, organic-inorganic perovskites have shown great potential in enhancing the performance of photovoltaic systems due to their exceptional optical and electronic properties. In this study, the influence of different hole transport layers (HTLs) and perovskite active layers (ALs) on the performance of solar cells was numerically analyzed using the Solar Cell Capacitance Simulator (SCAPS-1D). The results showed that CsSnI3 as the HTL and FAPbI(3) as the AL achieved the highest power conversion efficiency (PCE) of 23.90%. Machine learning (ML) was used to predict the performance metrics of solar cells with approximately 75% accuracy.
Article
Materials Science, Multidisciplinary
Golara Kafili, Elnaz Tamjid, Hassan Niknejad, Abdolreza Simchi
Summary: Recently, decellularized amniotic membranes (dAM) have been modified with sodium alginate and Laponite nanoplatelets to improve their rheological behavior and mechanical durability for 3D bioprinting. The addition of Laponite significantly enhanced the shear-thinning behavior and dynamic mechanical modulus of the hydrogel, enabling the printing of free-standing constructs without compromising biological properties. However, excessive agglomeration of the nanoplatelets at high concentrations was observed, leading to nozzle clogging. Overall, the nanoengineered hydrogel showed suitable structural integrity and biocompatibility, highlighting its potential for tissue engineering applications.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Chemistry, Analytical
Mohsen Saeidi, Hossein Chenani, Mina Orouji, MahsaSadat Adel Rastkhiz, Nafiseh Bolghanabadi, Shaghayegh Vakili, Zahra Mohamadnia, Amir Hatamie, Abdolreza (Arash) Simchi
Summary: This review systematically reviews the research progress of hydrogel-based wearable electrochemical biosensors (HWEBs). Hydrogels have excellent properties such as biocompatibility, high porosity, and reliable detection of disease biomarkers. However, most hydrogels suffer from low mechanical strength and electrical conductivity. Researchers have explored various electroactive nanofillers to improve the mechanical and electrochemical properties of hydrogels. The review also discusses the prospects and potential applications of HWEBs in biosensing, healthcare monitoring, and clinical diagnostics.
Article
Chemistry, Physical
Mohammadali Beheshti, Mohsen Saeidi, MahsaSadat Adel-Rastkhiz, Shohreh Shahrestani, Ali Zarrabi, Jing Bai, Abdolreza Simchi, Samineh Akbarmolaie
Summary: To address the stability issue of ZIF-67, an efficient electrocatalyst consisting of gold and silver nanostructures electrodeposited on a cobalt-based metal-organic framework (Au-Ag@ZIF-67) has been introduced for electrochemical CO2 reduction reaction (CO2RR). The results show that Au-Ag@ZIF-67 exhibits excellent structural stability, enhanced CO2 absorption, and improved catalytic activity towards CO gas, making it a promising development for CO2 gas elimination in the environment.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Hazal Ezgi Gultekin, Gokcen Yasayan, Ayca Bal-Ozurk, Ashkan Bigham, Abdolreza (Arash) Simchi, Atefeh Zarepour, Siavash Iravani, Ali Zarrabi
Summary: Wound healing is a complex process that requires effective management. Upconversion nanoparticles (UCNPs) have emerged as promising materials for wound dressing due to their unique properties. Functionalized with antibacterial agents, UCNPs have enhanced antibacterial properties and can deliver therapeutic agents to the wound site. They can also convert near-infrared light for therapy and diagnosis. However, the use of UCNPs in wound dressing faces challenges of stability, biocompatibility, efficient incorporation, scalability, and cost-effectiveness.
MATERIALS HORIZONS
(2023)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
