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| 1 | Intermetallic Compounds in the Banded Structure and Their Effect on Mechanical Properties of Al/Mg Dissimilar Friction Stir Welding Joints显示文摘Dissimilar friction stir welding(FSW) between aluminum and magnesium alloy was performed, using various tool rotational speed(TRS) at a ?xed travel speed, with tool offset to aluminum to investigate the formation of intermetallic compounds(IMCs) in the banded structure(BS) zone and their effect on mechanical properties. Large quantities of IMCs, in the form of alternating bands of particles or lamellae, were found in the BS zone, where drastic material intermixing occurred during FSW. The BS microstructural characters in terms of the morphology of the bands and the quantity and distribution of IMC particles varied with TRS. All welds exhibited brittle fracture mode with their fracture paths propagating mainly in/along the IMCs in the BS. It is shown that these BS microstructural characters have signi?cant effect on the mechanical properties of the joints. Suggestions on tailoring the BS microstructure were proposed for improving the strength of the BS zone and the ?nal mechanical properties of the Al/Mg FSW joints. | Hui Shi Ke Chen Zhiyuan Liang Fengbo Dong Taiwu Yu Xianping Dong Lanting Zhang Aidang Shan | 2017 | Journal of Materials Science & Technology2017，33，4： | 8 |
| 2 | Effects of Ziyin Jianghuo Ningxin decoction plus dehydroepiandrosterone and femoston in treatment of patients with menopausal symptoms显示文摘OBJECTIVE: To determine the therapeutic effect of Ziyin Jianghuo Ningxin Decoction(ZYJHNXD) plus dehydroepiandrosterone(DHEA) and menopausalhormone therapy(MHT) in patients suffering from menopausal symptoms identified as, in terms of Traditional Chinese Medicine, symptom pattern of Yin deficiency with hyperactive fire.METHODS: Totally 180 postmenopausal women aged 40 to 60 years were assigned into four groups and accepted femoston, femoston with ZYJHNXD,femoston with DHEA, femoston with ZYJHNXD and DHEA therapies, respectively, for three months.Common questionnaire-based measure instruments included modified Kupperman index(MKI),Hamilton Rating Scale for Anxiety(HAMA), and Hamilton Rating Scale for Depression(HAMD). Follicle-stimulating hormone(FSH), luteinizing hormone(LH), estradiol(E2), 5-hydroxyindole-3-acetic acid(5-HIAA), norepinephrine(NE), dopamine(DA),bone mineral density(BMD), and sleep quality were evaluated before and three months after the treatments.RESULTS: In all four groups, the scores of MKI, HAMA, HAMD and the levels of FSH, LH decreased significantly(P < 0.05) after the treatment, while the levels of E2, 5-HIAA, NE, and DA showed obvious elevation(P < 0.05). The group receiving ZYJHNXD and DHEA combined with femoston had superiority in the preservation of bone mineral density and improvement of total sleep time and nighttime sleep time over the other three groups.CONCLUSION: ZYJHNXD and DHEA combined with MHT therapy have a favorable outcome in managing menopausal symptoms, restoring hormone levels, preventing skeletal rarefaction or osteoporosis,and improving sleep quality for postmenopausal women. | Lin Jing Zhu Jun Tian Fubo Chen Lanting Zhang Yang Wang Yan Wang Mingyan Hans-Jurgen Gober Li Da-jin Wang Ling | 2018 | Journal of Traditional Chinese Medicine2018，38，5： | 6 |
| 3 | Feasible strategies for studying the involvement of DNA methylation and histone acetylation in the stress-induced formation of quality-related metabolites in tea(Camellia sinensis)显示文摘Tea plants are subjected to multiple stresses during growth,development,and postharvest processing,which affects levels of secondary metabolites in leaves and influences tea functional properties and quality.Most studies on secondary metabolism in tea have focused on gene,protein,and metabolite levels,whereas upstream regulatory mechanisms remain unclear.In this review,we exemplify DNA methylation and histone acetylation,summarize the important regulatory effects that epigenetic modifications have on plant secondary metabolism,and discuss feasible research strategies to elucidate the underlying specific epigenetic mechanisms of secondary metabolism regulation in tea.This information will help researchers investigate the epigenetic regulation of secondary metabolism in tea,providing key epigenetic data that can be used for future tea genetic breeding. | Jie Yang Dachuan Gu Shuhua Wu Xiaochen Zhou Jiaming Chen Yinyin Liao Lanting Zeng Ziyin Yang | 2021 | Horticulture Research2021，8，1： | 1 |
| 4 | Molecular dynamics study on mechanical behaviors of Ti/Ni nanolaminate with a pre-existing void显示文摘Metallic nanolaminated materials possess excellent mechanical properties due to their unique modulation structures and interfacial properties.However,how microdefects affect their mechanical properties is still uncertain.To evaluate the influences of void location(in the crystalline layer and the Ti/Ni interface),void diameter(d)and thickness of the intermediate layer(h)on overall tensile behaviors,various types of defective Ti/Ni nanolaminates with pre-existing void are established by the molecular dynamics method in this work.The results indicate that the strength and plastic deformation mechanisms are strongly dependent on those determinants.Yield stresses of Ti/Ni nanolaminates decrease distinctly with increasing void diameter,while peak stresses with a void in the crystalline layer decrease with increasing d/h.Different void locations lead eventually to disparate initial plastic deformation carriers around the void,and various evolutions in the microstructure of the defective Ti/Ni nanolaminates.The Ti/Ni interface plays a significant role in the tensile process.The semi-coherent interface impedes new grains and lattice dislocations from passing across the interface,while the incoherent interface facilitates dislocations generating and sliding along the interface,and absorbs the dislocations moving to the interface.The results also indicate that the strain rate significantly affects the evolution of the microstructure and the tensile properties of defective Ti/Ni nanolaminates. | Mengjia Su Qiong Deng Lanting Liu Lianyang Chen He He Yinggang Miao | 2022 | Nano Materials Science2022，4，2： | 0 |
| 5 | Inhibition of Abnormal Grain Growth in Stir Zone via In‑Situ Intermetallic Particle Formation During Friction Stir Welding of AA6061显示文摘Abnormal grain growth(AGG)has been widely observed in many friction stir welded(FSWed)joints during post-weld heat treatment(PWHT).The coarse grain structure not only reduces the strength of the joint but also limits its usage in superplastic forming.Several methods have been reported in previous studies to inhibit AGG,but all of them can only mitigate AGG.Complete inhibition of AGG was not achieved.In the current research,AGG was widely observed during the PWHT of friction stir welded AA6061.Multi-pass FSW enhanced the thermal stability of the as-welded grain structure but did not eliminate the occurrence of AGG.A new welding method was developed with the ball-milled Al–Ti powder mixture introduced into the stir zone and proved effective in inhibiting AGG in FSWed AA6061 during PWHT.The adoption of 5-pass FSW with an alternate rotation mode succeeded in producing an AGG-free sample.Microscopic characterizations conducted in the stir zone showed an evolution of Al–Ti powder mixture into different particle formations and Al3Ti new phase.Quantitative analysis of the second phase particles(SPPs)in the stir zone confirmed the increases in both particle number and average size.The quantitative results fit well with Humphreys’grain growth model,which theoretically explains the mechanism for AGG inhibition,i.e.,the significantly enhanced particle pinning effect. | Xin Zou Cunli Liu Muyang Deng Ji Chen Lanting Zhang Ke Chen | 2023 | Acta Metallurgica Sinica(English Letters)2023，36，4： | 0 |
| 6 | Rapid screening of magnetic properties in several Fe-X-Ni systems via combinatorial materials chip method显示文摘Fe-X-Ni(X=Cr,W and V)combinatorial thin-film(∼100 nm thick)materials chips covering the full composition range of ternary systems were fabricated.The crystal structure distribution was mapped by micro-beam X-ray diffractometers(XRD)and the magnetic hysteresis loops over the chip were characterized by a high-throughput magneto-optical Kerr effect(HT-MOKE)system to establish the composition-phase-magnetic properties relationships.The results showed that saturation magnetization for all systems has a strong dependency on alloying composition,and decreases with increasing dopped elements content as a general trend.Although the trend of saturation magnetization in bulk is in good agreement with that from thin films,all bulk samples show almost no coercivity,attributable to the much smaller grain size,and stronger texture in thin-film samples.Comparing the Fe-X-Ni systems under a similar condition,in the out-of-plane,Cr alloying obtained the largest coercivity(∼400 mT)followed by W alloying(∼300 mT)and then V alloying(∼200 mT).We suggest that alloying with different elements leads to the diverse orientation and crystallinity of the fcc phase resulting in different magnetic properties.Meanwhile,the effect of heat treatment on magnetic properties indicates that saturation magnetization is more closely related to the duration of heat treatment. | Cai Chen Xinyi Ji Jianhao Wang Mei Liu Yao Lu Xiaoping Wang Aimin Zhang Li Chen Xianping Dong Lanting Zhang Hong Wang | 2023 | Journal of Materiomics2023，9，1： | 0 |
| 7 | Critical Operation Strategies Toward High-Performance Lithium Metal Batteries显示文摘Commercial lithium(Li)-ion batteries(LIBs)are approaching their theoretical limits in energy density.As a result,Li metal batteries(LMBs)with either liquid or solid-state electrolytes have been proposed as a next-generation alternative,although they currently pose major safety and stability issues.To resolve these issues,most research has focused on the development and production of novelmaterials and coatings.Although promising performance benchmarks have been achieved,these strategiesmay generate issues for large-scale production,due to the added costs associated with using novel materials and developing the required cell fabrication process and infrastructure.Optimizing external conditions,such as selecting specific cell cycling protocols,testing the cell or synthesizing materials at specific temperatures,testing or fabricating the cell under specific mechanical pressures,etc.,are often overlooked as a means of directly improving battery performance without requiring complex material modifications.In this review,we will discuss how these external parameters can address the key failure mechanisms and challenges in LMBs that use either liquid or solid electrolytes.Similarities and differences in mechanisms(Li+transport,Li dendrite propagation,thermal effects,etc.)observed in liquid and solid-state configurations will also be discussed.Finally,we propose the outstanding scientific and economic gaps in LMBs,thereby providing future directions to explore. | Lanting Qian Tyler Or Yun Zheng Matthew Li Dana Karim Andy Cui Moin Ahmed HeyWoong Park Zhen Zhang Yaping Deng Aiping Yu Zhongwei Chen Khalil Amine | 2023 | Renewables2023，1，2： | 0 |
| 8 | Investigation of white matter functional networks underlying different behavioral profiles in attention-deficit/hyperactivity disorder显示文摘Background Cortical functional network alterations have been widely accepted as the neural basis of attention-deficit/hyperactivity disorder(ADHD).Recently,white matter has also been recognized as a novel neuroimaging marker of psychopathology and has been used as a complement to cortical functional networks to investigate brain–behavior relationships.However,disorder-specific features of white matter functional networks(WMFNs)are less well understood than those of gray matter functional networks.In the current study,we constructed WMFNs using a new strategy to characterize behavior-related network features in ADHD.Methods We recruited 46 drug-nale boys with ADHD and 46 typically developing(TD)boys,and used clustering analysis on restingstate functional magnetic resonance imaging data to generate WMFNs in each group.Intrinsic activity within each network was extracted,and the associations between network activity and behavior measures were assessed using correlation analysis.Results Nine WMFNs were identified for both ADHD and TD participants.However,boys with ADHD showed a splitting of the inferior corticospinal–cerebellar network and lacked a cognitive control network.In addition,boys with ADHD showed increased activity in the dorsal attention network and somatomotor network,which correlated positively with attention problems and hyperactivity symptom scores,respectively,while they presented decreased activity in the frontoparietal network and frontostriatal network in association with poorer performance in response inhibition,working memory,and verbal fluency.Conclusions We discovered a dual pattern of white matter network activity in drug-nale ADHD boys,with hyperactive symptom-related networks and hypoactive cognitive networks.These findings characterize two distinct types of WMFN in ADHD psychopathology. | Xuan Bu Yingxue Gao Kaili Liang Ying Chen Lanting Guo Xiaoqi Huang | 2022 | Psychoradiology2022，2，3： | 0 |
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