Article
Materials Science, Multidisciplinary
S. S. Xu, X. H. Lu, S. C. Liu, L. Chen, Y. Zhang, X. Z. Li, Z. W. Zhang
Summary: The precipitation strengthening of Cu/NiAl co-precipitates in martensite-austenite dual-phase steels under aging treatment was studied, showing that in the peak aging state, the co-precipitates contribute to an increase in yield strength and uniform elongation. The strengthening mechanisms mainly involve shearing and Orowan looping, with their contributions related to the martensitic phase content.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Jiangting Wang, Hossein Beladi, Libo Pan, Fang Fang, Jun Hu, Lingxue Kong, Peter D. Hodgson, Ilana Timokhina
Summary: This study successfully used continuous cooling process to achieve interphase precipitation-strengthened ferrite in dual-phase steels, with nano-sized (Ti, Mo) C interphase precipitates forming hardened ferrite phase, providing a new strategy for dual-phase steel production.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
C. Solis, A. Kirchmayer, I da Silva, F. Kuemmel, S. Muehlbauer, P. Beran, B. Gehrmann, M. Hafez Haghighat, S. Neumeier, R. Gilles
Summary: This study provides detailed characterization of the precipitation process in a new high-temperature alloy, revealing more information about nucleation, growth, and ripening processes. The results show that temperature and heating rate have significant effects on the formation and growth kinetics of precipitates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Shipeng Shu, Anthony De Luca, David C. Dunand, David N. Seidman
Summary: Micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si alloys affect precipitate evolution and resulting strengths, providing solid-solution strengthening and improving ambient-temperature strength and elevated-temperature creep resistance. Mn-modified precipitates exhibit higher number density, while Mo-modified precipitates display improved coarsening-resistance. Both Mn and Mo additions enhance creep resistance at 300 degrees C, with Mn-bearing alloys showing a more significant effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Jiang-Jing Wang, Suyang Sun, Lu Lu, Hongchu Du, Chun-Lin Jia, Oana Cojocaru-Miredin, Jian Yang, Guiwu Liu, Chongjian Zhou, Guanjun Qiao, Zhongqi Shi, En Ma, Bangzhi Ge, Yuan Yu, Matthias Wuttig, Wei Zhang
Summary: A design strategy to stabilize the excess zinc ions in β-Zn4Sb3 material and achieve a homogeneous distribution of zinc interstitials has been presented. This design strategy not only improves the carrier mobility and conductivity but also leads to excellent thermoelectric performance of the material.
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, David N. Seidman, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The research revealed that the formation and evolution of GPI and GPII zones during natural aging had a significant impact on the mechanical properties of the Al-7.6Zn-2.7Mg-2.0Cu-0.1Zr-0.07Ti alloy. The Zn/Mg atomic ratio, mean radius, number density, and volume fraction of the GP zones also played crucial roles in influencing the mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Hye-Jin Jeong, Ju-Won Park, Eunjoo Shin, Wanchuck Woo, Moon-Jo Kim, Heung Nam Han
Summary: The effect of electric current on precipitation hardening for advanced high-strength steel is investigated. It is found that electric current can induce additional hardening effect, leading to an increase in material hardness and volume fraction of precipitates.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Hirokazu Sasaki, Shunta Akiya, Yojiro Oba, Masato Onuma, A. D. Giddings, Tadakatsu Ohkubo
Summary: The strengthening effect of Cu-Ni-Si alloy by dispersing Ni-Si-based compound as a precipitate was investigated through various analytical methods, including transmission electron microscopy, small-angle X-ray scattering, small-angle neutron scattering, and atom probe tomography. The results showed that the precipitated phase became coarser with increasing aging temperature, providing insights into the diffusion layer at the interface between the Cu parent phase and the precipitated phase.
MATERIALS TRANSACTIONS
(2021)
Article
Chemistry, Physical
Patricia Jovicevic-Klug, Levi Tegg, Matic Jovicevic-Klug, Rahul Parmar, Matteo Amati, Luca Gregoratti, Laszlo Almasy, Julie M. Cairney, Bojan Podgornik
Summary: The study investigates the effect of deep cryogenic treatment (DCT) on a high-alloyed ferrous alloy and its effectiveness on carbide evolution and chemical shifts of alloying elements. With ex-situ and in-situ observations ranging from the microscopic to the nanoscopic level, the researchers uncover the atomistic mechanism by which DCT affects carbide precipitation, resulting in a 50% increase in carbide volume fraction. Mo plays a crucial role in DCT through its modification of chemical bonding states, which is postulated to originate from the loosely-formed primordial Mo2C carbides formed during exposure to cryogenic temperatures.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Matic Jovicevic-Klug, Levi Tegg, Patricia Jovicevic-Klug, Goran Drazic, Laszlo Almasy, Bryan Lim, Julie M. Cairney, Bojan Podgornik
Summary: Deep cryogenic treatment (DCT) is a promising green technology that can modify the properties of metallic materials. This study found that DCT can significantly improve the wear resistance of an Al-Mg-Si alloy without affecting other mechanical properties, due to slight hardness increase caused by microstructural modifications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Yudai Yamaguchi, Yuya Kanitani, Yoshihiro Kudo, Jun Uzuhashi, Tadakatsu Ohkubo, Kazuhiro Hono, Shigetaka Tomiya
Summary: In this study, the compositional and structural investigations of threading dislocations (TDs) in InGaN/GaN multiple quantum wells were conducted using correlative transmission electron microscopy (TEM) and atom probe tomography (APT). The results showed that indium atoms diffuse along the TD and their concentration decreases with distance from the InGaN layer. It was directly observed that the indium atoms originating from the InGaN layer diffuse toward the epitaxial GaN surface through the TD, possibly via the pipe diffusion mechanism induced by strain energy relaxation.
Article
Nanoscience & Nanotechnology
Vinothkumar Govindaraj, Peter Hodgson, Rajkumar P. Singh, Hossein Beladi
Summary: In this study, a new precipitation hardenable stainless steel modified primarily with Ni and Mn was designed using Thermo-Calc, resulting in improved mechanical properties after heat treatment. The evolution of Cu-precipitate was identified as the main factor causing changes in hardness and mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Daniel Hausmann, Andreas Foerner, Martin Proebstle, Daniela Huenert, Peter Felfer, Mathias Goeken, Steffen Neumeier
Summary: The study investigates precipitation behavior in different alloy conditions, revealing that materials with a low volume fraction of η/δ phase and a high proportion of primary γ' precipitates will form γ'' phase due to excess Nb. Spherical γ' precipitates with disc-shaped γ'' precipitates at γ' interfaces were observed. The enrichment of phase forming elements during discontinuous coarsening of η/δ plates leads to heterogeneous nucleation of γ' at the η/γ interface, with thin η plates embedded in δ phase in grain boundary pinning precipitates also confirmed. These results demonstrate the conditions under which certain primary phases form and how the consumption and redistribution of phase promoting elements trigger the formation of secondary phases.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
P. D. Edmondson, C. P. Massey, M. A. Sokolov, T. M. Rosseel
Summary: High-Cu weld material from a decommissioned reactor pressure vessel steel was characterized using atom probe tomography. The study found that after irradiation, nano-scale Cu-rich precipitates were uniformly distributed in the matrix with similar Cu content regardless of location in the vessel wall, indicating that neutron energy attenuation has no significant effect on the precipitation kinetics of CRPs in high-Cu RPV steels under irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
A. Persdotter, T. Boll, T. Jonsson
Summary: This study investigated the impact of minor amounts of corrosive species in the iron oxide formed on low-alloyed steel on corrosion resistance using STEM/EDX and APT techniques. The results suggest that these minor elements may increase the oxide growth rate and reduce the oxide integrity, thus impairing the corrosion resistance.
Review
Materials Science, Multidisciplinary
Zhiping Xiong, Ilana Timokhina, Elena Pereloma
Summary: Continuous innovations in design of advanced structural steels play a crucial role in the future progress of manufacturing, automotive and construction industries. Events at nano and atomic scales are essential in controlling steel strength, with strengths of 1-1.5 GPa realized in nano-scale precipitation strengthened steels. Modern characterization techniques allow for insight into mechanisms of solute atoms clustering, nano-precipitate formation, and interactions with dislocations contributing to strength.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jiangting Wang, Hossein Beladi, Libo Pan, Fang Fang, Jun Hu, Lingxue Kong, Peter D. Hodgson, Ilana Timokhina
Summary: This study successfully used continuous cooling process to achieve interphase precipitation-strengthened ferrite in dual-phase steels, with nano-sized (Ti, Mo) C interphase precipitates forming hardened ferrite phase, providing a new strategy for dual-phase steel production.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Florant Exertier, Jiangting Wang, Jing Fu, Ross K. W. Marceau
Summary: Atom probe tomography is a valuable three-dimensional characterization method that can offer unique information. Conductive coatings have been shown to be effective for analyzing biological and nonconductive samples. The study confirmed that graphene coating can reduce the evaporation field on electrically conductive materials, providing guidance for future research on graphene-coated nonconductive biological specimens.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Chemistry, Physical
Shuo Zhang, Gediminas Gervinskas, Yang Liu, Ross K. W. Marceau, Jing Fu
Summary: This study explores the application of nanoscale in-situ cryo-condensation coating technique on needle-shaped specimens and frozen hydrated cells. By controlling parameters, the properties of the deposited layer can be tuned, revealing surface morphologies and investigating the physical mechanisms of curing. This approach opens a novel route to nanofabrication on tip geometry and site-specific conductive protection.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Ilias Bikmukhametov, Hossein Beladi, Jiangting Wang, Vahid Tari, Anthony D. Rollett, Peter D. Hodgson, Ilana Timokhina
Summary: The study investigated the complexity of interphase precipitation in a Fe-0.19C-1.54Mn-0.4Si-0.06Al-0.13Mo-0.06Ti high strength low-alloy (HSLA) steel at an early stage of the austenite-to-ferrite transformation. It was found that solute atom distribution across the interface plays a crucial role in interphase precipitation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Raudhah Othman, Thomas Dorin, Nikki Stanford, Peter Hodgson
Summary: Three TWIP steels with different carbon concentrations based on the composition Fe-23Mn-3Si-3.3Al were studied using rapid solidification method. The driving force for solidification for this alloy showed similar preference for BCC and FCC solidification, within 10% of one another. Chemical analysis of the as-cast strip revealed inter-dendritic segregation of Si and Al, but negligible segregation of Mn. A simple heat treatment was effective in achieving chemical homogenization and producing fully austenitic microstructures.
MATERIALS SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
J. Banhart, Y-S Chen, Q. N. Guo, R. K. W. Marceau, J. M. Cairney
Summary: The study of precipitation kinetics in aluminium alloys provides insights into the role of excess vacancies in the ageing process. Investigations on nanometer-sized samples reveal that clustering is effectively suppressed in solutionised and quenched samples. Precipitation calculations demonstrate a rapid loss of vacancies during and after quenching. Exploratory ageing experiments at elevated temperatures do not show the formation of clusters, possibly due to experimental limitations or unfavorable nucleation conditions in the nanometer-sized samples.
Article
Nanoscience & Nanotechnology
Lu Jiang, Timothy Langan, Thomas Wood, Paul Sanders, Thomas Dorin
Summary: Pre-stretching in Al-Cu alloys leads to preferential formation of precipitates in certain habit planes and causes anisotropic mechanical properties. Adding Sc and Zr can eliminate this anisotropy. The presence of dispersoids promotes uniform nucleation of precipitates in all habit planes, resulting in improved isotropy for the alloy.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Shuo Zhang, Gediminas Gervinskas, Shi Qiu, Hari Venugopal, Ross K. W. Marceau, Alex de Marco, Jian Li, Jing Fu
Summary: New high-resolution imaging methods for biological samples, such as atom probe tomography (APT), have emerged thanks to the invention of laser-pulsed atom probes and cryo-transfer procedures. Ensuring the vitreous state of fabricated aqueous needle-shaped APT samples is a challenge, but has shown potential with approaches like the open microcapillary (OMC) method, high-pressure freezing method (HPF), and graphene encapsulation method. Cryo-TEM diffraction patterns have demonstrated achievement of vitreous state in ice needles using these methods, opening new avenues for near-atomic imaging of biological cells.
Article
Chemistry, Physical
Peng Zhang, Majid Laleh, Anthony E. Hughes, Ross K. W. Marceau, Tim Hilditch, Mike Yongjun Tan
Summary: Although studies on hydrogen embrittlement have been conducted for a long time, there is a lack of systematic research on the susceptibility of steels to hydrogen embrittlement under different electrochemical charging conditions. This study focuses on this knowledge gap by evaluating the behavior of a typical pipeline steel (X65) after hydrogen-charging in different electrolytes that simulate industrial environments. The results show that the susceptibility to hydrogen embrittlement of X65 steel varies significantly with the hydrogen-charging electrolytes and, to a lesser extent, with the electrochemical charging variables.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
S. Mukherjee, I. Timokhina, J. Wang, A. Chakraborty, S. Pramanik, S. Kundu, P. D. Hodgson
Summary: A novel V-Nb-Mo steel was thermomechanically processed to promote ferrite grain refinement and precipitation. The study found two main types of precipitates: nano-scale interphase precipitates and fibrous precipitates (FP). The interphase precipitates had a disc shape, while the FP were rod-shaped.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
T. Dorin, S. Babaniaris, L. Jiang, A. Cassel, A. Eggeman, J. Robson
Summary: Additions of Sc and Zr provide significant strengthening to Al through the formation of dispersoids. The effect of Fe impurities on precipitation mechanisms in Al-Sc-Zr alloys is poorly understood. The evolution of solid solution during aging of Al-Sc, Al-Zr, and Al-Sc-Zr alloys was monitored using resistivity and thermo-electric power measurements. A new class of Fe-rich plate-like precipitates was revealed.
Article
Nanoscience & Nanotechnology
Lu Jiang, Katrin Mester, Robert Knott, Kathleen Wood, Anna Sokolova, Timothy Langan, Matthew Barnett, Thomas Dorin
Summary: This study investigates the impact of Sc and Zr on the precipitation kinetics in an Al-Cu-Li alloy without pre-stretching. In-situ Small-Angle X-ray Scattering (SAXS) and hardness measurements are used to analyze the precipitation kinetics. The presence of Al3(Sc, Zr) dispersoids accelerates the precipitation kinetics significantly. Surprisingly, TEM reveals the absence of T1 precipitates in the peak aged condition, and APT and DFT calculations suggest that the Al3Zr-shell acts as preferred heterogeneous nucleation sites for 0 ' precipitates.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Yi Yang, Veronique Massardier, Mahmoud Reza Ghandehari Ferdowsi, Lu Jiang, Jun Wang, Thomas Dorin, Sitarama R. Kada, Matthew R. Barnett, Michel Perez
Summary: This study provides new insights into the precipitation kinetics in Mg-Zn alloys. Through the characterization of the evolution of Zn solute, precipitate size, and volume fraction using various techniques, the experimental results are supported by a precipitation model based on classical nucleation and growth theories. The study reveals the prevalence of rod-shaped precipitates in the early aging stage and plate-shaped precipitates in the overaging stage.
Article
Materials Science, Multidisciplinary
Kanwal Chadha, Yuan Tian, Lu Jiang, Thomas Dorin, John Spray, Clodualdo Aranas
Summary: The microstructural properties and strengthening mechanisms of precipitation strengthening Corrax stainless steel manufactured by laser powder bed fusion were investigated. The research shows that aging heat treatment can trigger the formation of austenite laths between martensitic structures, resulting in the formation of Ni- and Al-rich spherical precipitates. The formation of these precipitates contributes to the excellent hardness and strength of Corrax.
MRS COMMUNICATIONS
(2022)
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)
