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| 1 | Effect of cathodic potential on stress corrosion cracking behavior of different heat-affected zone microstructures of E690 steel in artificial seawater显示文摘In this work,the stress corrosion cracking(SCC)behavior of E690 steel base metal(BM)and different heat-affected zone(HAZ)microstructures,i.e.,coarse grain HAZ(CGHAZ),fine grain HAZ(FGHAZ),and intercritical HAZ(ICHAZ),was investigated at different cathodic potentials in artificial seawater by slow strain rate tensile tests,scanning electron microscopy and electron back-scattered diffraction measurements.The results show that the HAZ microstructures and BM exhibit different SCC susceptibilities:FGHAZ | Yong Li Zhiyong Liu Endian Fan Yunhua Huang Yi Fan Bojie Zhao | 2021 | Journal of Materials Science & Technology2021，，5： | 6 |
| 2 | The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater显示文摘The environment at crack tip and its effect on the crack growth behaviour of low alloy steel-E690 steel were studied at cathodic potentials in artificial seawater.The results showed that the micro environment at crack tip and crack growth behaviour were related to the electrochemical reactions at crack tip,which were affected by the stress state and applied potentials.The crack tip environment was acidified under cyclic loading,resulting from the crack tip anodic dissolution reaction and corresponding hydrolysis reaction.Because of the hydrogen evolution and the inhibited anodic dissolution inside the crack,the crack tip p H increases as the cathodic potential decreases.The effect of cathodic potentials on the electrochemical reactions caused the variation of the hydrogen content,which influenced the crack growth rate because the crack growth behaviour was controlled by hydrogen embrittlement mechanism.This resulted in a fact that with the negative decrease of potential,the crack growth rate first decreased and then increased,with the minimum rate at-0.75 V.And the crack growth path exhibited transgranular fracture. | Yong Li Zhiyong Liu Endian Fan Zhongyu Cui Jinbin Zhao | 2020 | Journal of Materials Science & Technology2020，54，19： | 5 |
| 3 | A combination therapy for androgenic alopecia based on quercetin and zinc/copper dual-doped mesoporous silica nanocomposite microneedle patch显示文摘A nanocomposite microneedle(ZCQ/MN)patch containing copper/zinc dual-doped mesoporous silica nanoparticles loaded with quercetin(ZCQ)was developed as a combination therapy for androgenic alopecia(AGA).The degradable microneedle gradually dissolves after penetration into the skin and releases the ZCQ nanoparticles.ZCQ nanoparticles release quercetin(Qu),copper(Cu^(2+))and zinc ions(Zn^(2+))subcutaneously to synergistically promote hair follicle regeneration.The mechanism of promoting hair follicle regeneration mainly includes the regulation of the main pathophysiological phenomena of AGA such as inhibition of dihydrotestosterone,inhibition of inflammation,promotion of angiogenesis and activation of hair follicle stem cells by the combination of Cu^(2+)and Zn^(2+)ions and Qu.This study demonstrates that the systematic intervention targeting different pathophysiological links of AGA by the combination of organic drug and bioactive metal ions is an effective treatment strategy for hair loss,which provides a theoretical basis for development of biomaterial based anti-hair loss therapy. | Zhaowenbin Zhang Wenbo Li Di Chang Ziqin Wei Endian Wang Jing Yu Yuze Xu Yumei Que Yanxin Chen Chen Fan Bing Ma Yanling Zhou Zhiguang Huan Chen Yang Feng Guo Jiang Chang | 2023 | Bioactive Materials2023，，6： | 1 |
| 4 | Effect of crystallographic orientation on crack growth behaviour of HSLA steel显示文摘In this work,the crack growth behaviours of high strength low alloy(HSLA)steel E690 with three crystallographic orientations(the rolling direction,normal direction,and transverse direction)were investigated and compared from the view of the mechano-electrochemical ef-fect at the crack tip.The results show that the crack growth of the HSLA steel is controlled by the corrosion fracture at the crack tip.The vari-ation of crystallographic orientation in E690 steel plate has no influence on the crack tip electrochemical reaction and crack growth mechanism,but changes the crack growth rate.When the stress loading direction is parallel to the rolling direction and the fracture layer is parallel to the transverse-normal plane,the crack growth rate is the slowest with a value of 0.0185 mm·h^(-1).When the load direction and the fracture layer are parallel to the normal direction and the rolling-transverse plane,respectively,the crack growth rate is the highest with a value of 0.0309 mm·h^(-1).This phenomenon is ascribed to the different microstructural and mechanical properties in the rolling direction,normal direction,and transverse direction of E690 steel plate. | Endian Fan Yong Li Yang You Xuewei Lü | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，8： | 0 |
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