Article
Polymer Science
Xiehuai Luo, Pingping Wu, Bin Lan, Jian Jiang, Qi Yang
Summary: In this study, highly oriented PP/TMB-5 composites and PP/POE/TMB-5 composites were prepared via solid die-drawing, with the addition of POE particles leading to further improvement in toughness and an increase in tensile and impact strength of the materials.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
Wenxia Jia, Ranran Zhuo, Mingkun Xu, Jiaxiang Lin, Xiaoting Li, Chuntai Liu, Changyu Shen, Chunguang Shao
Summary: Using a homemade pressure device, the synergistic effect of pressurization rate and beta-form nucleating agent on the crystallization of isotactic polypropylene melt was explored. Different crystal phases of iPP were found to be influenced by the pressurization rate, with a competitive growth between beta- and gamma-iPP observed at specific rates. The presence of mesophase was also determined by the pressurization rate, with a theoretical model of pressurization-induced crystallization established to explain the process.
Article
Materials Science, Composites
Xincheng Guo, Yao Chen, Jianbing Guo, Jun Qin, Honglin Lian, Zongcheng Lu, Xiaolang Chen
Summary: This study investigates the regulation of PP/EVA/LDH composites with a beta nucleating agent through annealing treatment, which results in improved toughness. The enhancement of energy dissipation behavior under impact loading is attributed to the debonding of the phase interface and the enhancement of cavitation, as well as the rearrangement of crystalline structures.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Physical
Mateusz Barczewski, Olga Mysiukiewicz, Michal Dutkiewicz, Mariusz Szolyga, Monika Dobrzynska-Mizera, Adam Piasecki
Summary: This study aimed to investigate the influence of shear stress during real-life industrial processes on the crystallization of isotactic polypropylene nucleated with a silsesquioxane-based beta-nucleating agent. The samples were prepared by compression molding and injection molding, and the thermal, morphological, and mechanical properties were studied to evaluate the efficiency of the nucleating agents under shearing conditions. The results showed that both the silsesquioxane-based and commercial nucleating agents have similar effects on the formation of the hexagonal iPP phase, considering the shearing and cooling conditions.
Article
Polymer Science
Yang Yue, Xuan Sha, Fushan Wang, Yan Gao, Liangliang Zhang, Xinxin Wang, Jiachun Feng
Summary: The effect of beta-nucleating agent on the self-nucleation of isotactic polypropylene was systematically investigated in this study. It was found that the presence of beta-NA increased the transition temperatures and narrowed the temperature width of the self-nucleation domain of iPP. The increased thermal stability of ordered structures in iPP containing beta-NA may be related to the beta-alpha transformation occurred upon heating.
Article
Polymer Science
Akihiko Toda
Summary: The historically renowned Avrami model predicts the continuous change in the nucleation and linear growth process of spherical domains under isothermal conditions. This model is applied to the crystallization of PBT, which shows temperature-dependent changes in the Avrami index when a nucleating agent talc is added. The efficiency and dispersibility of the nucleating agent are evaluated based on the analysis of the transformation rate and the relative increase in number density.
Article
Materials Science, Multidisciplinary
Elango Chandiran, Yuya Nagata, Fei Sun, Goro Miyamoto, Tadashi Furuhara
Summary: This study investigates the effect of deformation temperature, strain rate, and strain on the deformation behavior and microstructure evolution in Ti-17 alloy. Dynamic recovery is the dominant restoration mechanism during deformation, while alpha precipitation occurs at beta boundaries during deformation at temperatures less than T-beta.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Min Xu, Yu Han, Xiangyang Li, Jianjun Ding, Kang Zheng, Yongxing Lin, Lin Chen, Xingyou Tian
Summary: Adding a moderate amount of WBG-II into the iPP/PB-1 blends can greatly promote the formation of form I' and improve the thermostability by rapidly recrystallizing into form II upon heating.
Article
Polymer Science
Xiaoke Liu, Shuang Jin, Zhiliang Shi, Hang Cong, Wei Gong, Yuhui Zhou
Summary: A novel beta-nucleating and foaming nucleating agent HQ[6]/EA was synthesized for polypropylene (PP), which significantly improved the crystallization rate, crystallinity, and mechanical properties of nucleated PP. When used as a nucleating agent, HQ[6]/EA showed reduced cell size and increased cell density in the foamed PP composite. The addition of HQ[6]/EA at 0.5% (by weight) exhibited considerable enhancement in tensile, flexural strength, and impact strength properties of PP composites.
IRANIAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Wei Qin, XiXiang Zhang, Leishan Shao, Zhong Xin, Hao Ling, Shicheng Zhao
Summary: The physical interactions between zinc adipate and calcium stearate result in the loss of beta-nucleating ability, blocking the nucleation sites and hindering lattice matching in isotactic polypropylene. This leads to inhibition of the epitaxial crystallization process, decreasing the degree of beta-crystal formation and lowering the toughness of the resulting iPP.
Article
Chemistry, Physical
Xiaoli Zhao, Yu Wang, Hao Xue, Nan Jia, Yang Liu, Deliang Zhang
Summary: Increasing strain rate in Ti-30Zr-5Mo alloy leads to stress-induced alpha ' phase transformation, resulting in ultra-high strain hardening rate and localized deformation, ultimately enhancing ultimate tensile strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Polymer Science
Wanxin Peng, Jian Kang, Xiuduo Song, Yue Zhang, Bo Hu, Ya Cao, Ming Xiang
Summary: The effects of MXene on the crystallization behavior of beta-nucleated isotactic polypropylene (iPP) were studied, revealing that the beta-nucleation efficiency of WBG-II is higher than the alpha-nucleation efficiency of MXene when compounded together, indicating a competitive relationship between the two.
Article
Chemistry, Physical
S. Pilz, A. Hariharan, F. Guenther, M. Zimmermann, A. Gebert
Summary: This study reveals the influence of omega iso precipitates on the deformation mechanisms and mechanical properties of a biomedical beta-type Ti-40Nb alloy. The results show that the fraction and size of omega iso increased with increasing aging time, leading to an increase in Young's modulus and proof stress. The active deformation mechanisms also changed with aging time, resulting in significant alterations in mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Multidisciplinary
Shiduo Sun, Dongwei Li, Chenpeng Yang, Libo Fu, Deli Kong, Yan Lu, Yizhong Guo, Danmin Liu, Pengfei Guan, Ze Zhang, Jianghua Chen, Wenquan Ming, Lihua Wang, Xiaodong Han
Summary: Metals usually exhibit one crystal structure, but this study shows that bending can cause fcc-structured Ag to access all three crystal structures. The complete process of transitioning from fcc to bcc, hcp, and finally re-oriented fcc structure was observed in situ.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
Haitao Zhou, Fantao Kong, Yanbo Wang, Xiangwu Hou, Ning Cui, Jingli Sun
Summary: This paper investigated the deformation and phase transformation of disordered alpha phase in the (alpha + gamma) two-phase region in the Ti-44Al-8Nb-(W, B, Y) alloy. The microstructural evolution was found to be significantly affected by the deformation conditions, primarily the lower temperature and strain rate. A microstructure evolution model for the alloy at 1250 degrees C during hot rolling was established.
Article
Polymer Science
Huixian Zhang, Hongwei Bai, Shihao Deng, Zhenwei Liu, Qin Zhang, Qiang Fu
Article
Energy & Fuels
Xiao Wei, Fei Xue, Xiao-dong Qi, Jing-hui Yang, Zuo-wan Zhou, Yan-ping Yuan, Yong Wang
Article
Engineering, Environmental
Fang-fang Ma, Di Zhang, Ting Huang, Nan Zhang, Yong Wang
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Polymer Science
Shihao Deng, Hongwei Bai, Zhenwei Liu, Qin Zhang, Qiang Fu
Article
Polymer Science
Zhenwei Liu, Meirui Fu, Fangwei Ling, Guopeng Sui, Hongwei Bai, Qin Zhang, Qiang Fu
Article
Polymer Science
Zhenwei Liu, Fangwei Ling, Xingyuan Diao, Meirui Fu, Hongwei Bai, Qin Zhang, Qiang Fu
Article
Polymer Science
Xiangli Li, Dongsheng Yang, Youbo Zhao, Xingyuan Diao, Hongwei Bai, Qin Zhang, Qiang Fu
Article
Polymer Science
Dongyu Bai, Huili Liu, Yilong Ju, Shihao Deng, Hongwei Bai, Qin Zhang, Qiang Fu
Article
Materials Science, Multidisciplinary
Huili Liu, Dongyu Bai, Songlin Du, Xia Li, Hongwei Bai, Qiang Fu
Summary: This study presents a promising strategy to improve the transparency and stiffness-toughness performance of PLLA blends toughened with BAMMA core-shell rubber nanoparticles by utilizing SC crystallization. The construction of SC crystallites in the PLLA matrix prevents nanoparticle aggregation and promotes the formation of a network-like structure, leading to enhanced toughening efficiency and transparency.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Ju Yao, Zhen Zeng, Hongwei Bai, Qin Zhang, Qiang Fu
Summary: Efficient formation of finely dispersed stereocomplex crystallites can be achieved through a unique melt-mixing procedure, but the introduction of premixed chains may significantly decrease the quantity of SCs particles formed, despite smaller particle size.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Polymer Science
Shihao Deng, Ju Yao, Hongwei Bai, Hao Xiu, Qin Zhang, Qiang Fu
Summary: By incorporating trace amounts of ESA into PLLA/PDLA/elastomer blends and conducting direct meltblending at high temperature, the melt memory effect of the SC-PLA matrix can be improved, leading to enhanced fracture toughness and heat resistance.
Article
Polymer Science
Yi-Long Ju, Xiang-Li Li, Xing-Yuan Diao, Hong-Wei Bai, Qin Zhang, Qiang Fu
Summary: This research demonstrates a feasible method to enhance the SC crystallizability of Stereocomplex-type polylactide (SC-PLA) by incorporating small amounts of atactic poly(D,L-lactide) (PDLLA) into PLLA/PDLA blends, improving chain mixing and melt stability while promoting SC crystallization. Increasing content and molecular weight of PDLLA lead to predominantly formed SC crystallites, with exclusive SC crystallization achieved in racemic blends with appropriate PDLLA content and molecular weight.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zhen Zeng, Yuanlin Luo, Hongwei Bai, Qin Zhang, Qiang Fu
Summary: Constructing stereocomplex crystallites at the interface of PLLA/elastomer blends can significantly improve the properties of the materials. By manipulating the interfacial structure, the size and packing density of the crystallites can be controlled, leading to improved toughness and crystallization rate of the blends.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Crystallography
Xingyuan Diao, Xiaonan Chen, Shihao Deng, Hongwei Bai
Summary: In this study, trace amounts of epoxy-functionalized small-molecule modifiers were introduced into enantiomeric blends during reactive melt-blending to enhance the formation of stereocomplex-type polylactide (SC-PLA). The results showed that the in situ generation of multi-arm stereo-block PLA copolymers significantly improved SC formation, even with only 0.5 wt% modifiers. The unique copolymers acted as compatibilizers, suppressing the separation of the alternately arranged PLLA/PDLA chain segments in the molten state. Furthermore, the generation of these copolymers did not significantly increase the melt viscosity of the blends, suggesting new opportunities for high-throughput processing of SC-PLA materials.
Article
Materials Science, Multidisciplinary
Ju Yao, Zhen Zeng, Hongwei Bai, Qin Zhang, Qiang Fu
Summary: In asymmetric poly(L-lactide)/poly(D-lactide) blends, achieving high-efficient formation of finely dispersed stereocomplex crystallites can be challenging due to competition between stereocomplexation and chain mixing. Pre-mixing PLLA and PDLA chains can lead to decreased formation efficiency of SC particles, despite smaller particle size. Direct mixing at lower temperatures is more effective for constructing SCs with superior nucleation efficiency, compared to common melt-processing conditions.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
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)