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Slip deformation mechanism of α-Zr at 700 °C

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Transactions of Nonferrous Metals Society of China 2019年第7期29卷 1465-1475页

作者： Qing-hui ZENG Adrien CHAPUIS bai-feng luan Qing LIU College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

Mechanical properties, corrosion behavior and hydrogen absorption of zirconium alloys are related to the texture resulting from prior forming processes. In order to investigate the high temperature deformation behavior of α-Zr, compression tests at 700 ℃, microstructure measurements via EBSD, and visco-plastic self-consistent modeling were performed. Twinning activity was negligible at strain rates ε≤1s^-1. The strain rate sensitivity m=0.17 seemed to be the same for all slip modes. Material parameters were fitted to reproduce the mechanical anisotropy and deformed texture, and were validated by comparing the simulated and measured strain anisotropy. The best-fit simulation showed that at high temperatures prismatic slip was the easiest deformation mode and pyramidal was the hardest, but basal slip and pyramidal slip operated easily and in large amount.

关键词： deformation mechanism Zr alloy EBSD crystal plasticity plastic deformation

The effects of 17β-trenbolone and bisphenol A on sexual behavior and social dominance via the hypothalamic-pituitary-gonadal axis in male mice

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Journal of Environmental Sciences 2025年第5期151卷 54-67页

作者： Xiang Zuo Minghe Sun Huijuan bai Shuhui Zhang Jialu luan Qian Yu Zhenhua Fu Qili Zhao Mingzhu Sun Xin Zhao Xizeng feng College of Life Science State Key Laboratory of Medicinal Chemical BiologyThe Key Laboratory of Bioactive MaterialsMinistry of EducationNankai UniversityTianjin 300071China Institute of Robotics&Automatic Information System College of Artificial IntelligenceNankai UniversityTianjin 300071China

17β-Trenbolone(17-TB)is well documented as an environmental endocrine disruptor in aquatic biological studies,but its effects on mammals remain poorly ***,17-TB acts as a hormone with properties similar to testosterone,and the consequences of juvenile exposure on adult social behavior remain *** A(BPA)acts as an estrogen-like hormone,compared to ***-week-old male Balb/c mice were exposed orally to 17-TB(100μg/(kg·day))and BPA(4 mg/(kg·day))for 28 *** of social interactions and a three-chamber test showed that 17-TB increased virility in male mice,intensified both male and female sexual behavior,and attracted and accepted female *** also increased social dominance through tube tests inmalemice and markedly activated the c-Fos^(+)immune response in themedial prefrontal cortex(mPFC)and basal amygdala(BLA).ELISA data showed that 17-TB and BPA exposure significantly affected serum gonadotropin-releasing hormone(GnRH),growth hormone(GH),estradiol(E2),and luteinizing hormone(LH)levels,as well as testicular lesions and androgen receptor(ARβ)and estrogen receptor(ERα)*** transcriptomic analysis further confirmed that could disrupt steroid synthesis and linoleic acid-related biometabolic *** findings suggest the influence of 17-TB and BPA exposure on sexual behavior and fertility in male mice,possibly through modulation of the hypothalamic-pituitary-gonadal *** study provides insights relevant to human reproductive health and neuro-social behavioral research,and the potential risk of environmental disturbances should not be overlooked.

关键词： 17β-Trenbolone(17-TB) Bisphenol A(BPA) hypothalamic-pituitary-gonadal axis(HPG) Sex hormones Social dominance Sexual behavior

Microstructure and textural evolution during cold rolling and annealing of commercially pure titanium sheet

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Transactions of Nonferrous Metals Society of China 2018年第6期28卷 1123-1131页

作者： Na LIU Ying WANG Wei-jun HE Jun LI Adrien CHAPUIS bai-feng luan Qing LIU College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Pangang Group Research Institute Co. Ltd.Chengdu 610031China

The effects of cold rolling and annealing on the microstructure and textural evolution of a commercially pure titanium（CP-Ti） sheet were investigated. Electron backscatter diffractometry demonstrates that the deformation during rolling is accommodated by twinning and slip. Additionally, twinning is the dominant deformation mechanism when the cold rolling reduction is less than 40%. During rolling, {11ˉ22}11ˉ2ˉ3contraction twinning（CT） and {10ˉ12}10ˉ11 extension twinning（ET） are activated. And, the intensity of the（0002） pole along the ND gradually increases with increasing deformation. During annealing, the fraction of low angle grain boundaries（LAGBs） and the intensity of the（0002） pole along the ND gradually decrease slightly with increasing annealing time, while twinning lamellae disappear rapidly. When the annealing time reaches 60 min, 20% cold-rolled sheet recrystallizes almost completely.

关键词： commercially pure titanium texture twinning cold rolling recrystallization

Hot deformation and processing maps of as-sintered CNT/Al-Cu composites fabricated by flake powder metallurgy

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Transactions of Nonferrous Metals Society of China 2018年第9期28卷 1695-1704页

作者： Chun-hong LI Ri-sheng QIU bai-feng luan Wei-jun HE Zhi-qiang LI College of Materials Science and Engineering Chongqing UniversityChongqing 400044China College of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Materials Science and Engineering Shanghai Jiaotong UniversityShanghai 200240China

The deformation behaviors of as-sintered CNT/Al-Cu composites were investigated by isothermal compression tests performed in the temperature range of 300-550°C and strain rate range of 0.001-10 s-1 with Gleeble 3500 thermal simulator *** maps based on dynamic material model(DMM)were established at strains of 0.1-0.6,and microstructures before and after hot deformation were characterized by scanning electron microscopy(SEM),electron backscatter diffraction(EBSD)and high-resolution transmission electron microscopy(HRTEM).The results show that the strain has a significant influence on the processing maps,and the optimum processing domains are at temperatures of 375-425°C with strain rates of 0.4-10 s-1 and at 525-550°C with 0.02-10 s-1 when the strain is *** inhomogeneous distribution of large particles,as well as a high density of tangled dislocations,dislocation walls,and some sub-grains appears at low deformation temperatures and strain rates,which correspond to the instability domain.A homogeneous distribution of fine particles and dynamic recrystallization generates when the composites are deformed at 400 and 550°C under a strain rate of 10 s-1,which correspond to the stability domains.

关键词： CNT/Al-Cu composites flow stress processing map dynamic recrystallization

Interaction of major facilitator superfamily domain containing 2A with the blood-brain barrier

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Neural Regeneration Research 2025年第8期20卷 2133-2152页

作者： Yilun Ma Taiwei Dong Fei luan Juanjuan Yang feng Miao Peifeng Wei College of Pharmacy and First Clinical Medical College Shaanxi University of Chinese MedicineXianyangShaanxi ProvinceChina National Drug Clinical Trial Agency The Second Affiliated Hospital of Shaanxi University of Chinese Medicine/Xixian New District Central HospitalXi′anShaanxi ProvinceChina

The functional and structural integrity of the blood-brain barrier is crucial in maintaining homeostasis in the brain microenvironment;however,the molecular mechanisms underlying the formation and function of the blood-brain barrier remain poorly *** major facilitator superfamily domain containing 2A has been identified as a key regulator of blood-brain barrier *** plays a critical role in promoting and maintaining the formation and functional stability of the blood-brain barrier,in addition to the transport of lipids,such as docosahexaenoic acid,across the blood-brain ***,an increasing number of studies have suggested that major facilitator superfamily domain containing 2A is involved in the molecular mechanisms of blood-brain barrier dysfunction in a variety of neurological diseases;however,little is known regarding the mechanisms by which major facilitator superfamily domain containing 2A affects the blood-brain *** paper provides a comprehensive and systematic review of the close relationship between major facilitator superfamily domain containing 2A proteins and the blood-brain barrier,including their basic structures and functions,cross-linking between major facilitator superfamily domain containing 2A and the blood-brain barrier,and the in-depth studies on lipid transport and the regulation of blood-brain barrier *** comprehensive systematic review contributes to an in-depth understanding of the important role of major facilitator superfamily domain containing 2A proteins in maintaining the structure and function of the blood-brain barrier and the research progress to *** will not only help to elucidate the pathogenesis of neurological diseases,improve the accuracy of laboratory diagnosis,and optimize clinical treatment strategies,but it may also play an important role in prognostic *** addition,the effects of major facilitator superfamily domain containing 2A on blood-brain barrier lea

关键词： blood-brain barrier(BBB) caveolin-1 central nervous system docosahexaenoic acid endothelial cells lysophosphatidylcholine major facilitator superfamily domain containing 2A(MFSD2A) transcytosis

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蒸汽管网在线监测系统的设计与应用

辽宁化工 2012年第11期41卷 1145-1147页

作者：白凤娈中国石油化工股份有限公司沧州分公司信息中心河北沧州061000

蒸汽管网在线监测系统是一个B/S(Browse/Server)模式,并以在线模拟与检测技术和ORACLE数据库技术为基础的蒸汽管网监测系统,本系统的主要功能:管网基本信息管理、实时工况监测以及历史数据查询。本系统的应用有效地帮助企业提高了蒸汽... 详细信息

蒸汽管网在线监测系统是一个B/S(Browse/Server)模式,并以在线模拟与检测技术和ORACLE数据库技术为基础的蒸汽管网监测系统,本系统的主要功能:管网基本信息管理、实时工况监测以及历史数据查询。本系统的应用有效地帮助企业提高了蒸汽管网管理水平,增强蒸汽系统运行的安全性和可靠性,收到明显的节能降耗效益。

关键词：蒸汽管网系统集成数据采集模拟计算

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液态烃球罐储量计算方法探讨

辽宁化工 2013年第3期42卷 250-251页

作者：白凤娈沧州炼油厂信息中心河北沧州061000

液态烃球罐储量计算,通常是根据储罐内液态烃的体积、密度加上计量温度下液态烃的体积温度修正系数,即VCF值(以下简称VCF值),其中,液态烃的VCF值与计量温度、密度有关。本文主要探讨液态烃VCF值的计算并运用计算机语言实现精确快速计算... 详细信息

液态烃球罐储量计算,通常是根据储罐内液态烃的体积、密度加上计量温度下液态烃的体积温度修正系数,即VCF值(以下简称VCF值),其中,液态烃的VCF值与计量温度、密度有关。本文主要探讨液态烃VCF值的计算并运用计算机语言实现精确快速计算的方法。

关键词：液态烃球罐储量计算方法

Deformation twinning and textural evolution of pure zirconium during rolling at low temperature

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Transactions of Nonferrous Metals Society of China 2013年第10期23卷 2890-2895页

作者：栾佰峰叶青陈建伟余泓冰邹东利信运昌重庆大学材料科学与工程学院重庆400044

Industry pure zirconium sheets with a strong c-axis fiber texture were rolled to different strains at 77 K to investigate the twinning behavior and deformation mechanism. The microstructure and texture of the rolled specimens were characterized by scanning electron microscopy （SEM） together with electron backscatter diffraction （EBSD） techniques. The results show that the {1022} （1123） compression twinning mode is the dominant deformation twin at low strains loaded along the c-axis, and the {1012} （ 10]- 1 ） tensile twinning generates as the second twin in {1022} （ 1123 ） twins. The selection of twinning modes is governed by Schmid factor （SF） due to the calculating of SF and the EBSD simulating of twinning distribution. The evolution of texture during rolling affected by twins with increase of the strain was explained.

关键词： zirconium twinning texture rolling

低价锆氧化物Zr_(3)O的结构、热力学和弹性性质第一性原理研究

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Transactions of Nonferrous Metals Society of China 2024年第3期34卷 952-965页

作者：周虹伶陈莉君杨晓玲刘许旸孙超栾佰峰重庆大学材料科学与工程学院轻合金材料国际合作联合实验室沈阳材料科学国家研究中心重庆400044 重庆大学航空航天学院重庆400044 中国核动力研究设计院反应堆燃料及材料重点实验室成都610213 重庆大学机械传动国家重点实验室重庆400044

采用第一性原理系统地研究3种Zr_(3)O晶形(空间群分别为R3c(斜方六面体)、R32(斜方六面体)和P6322(六面体))的晶格动力学及其与温度相关的热力学和力学性质。计算得到的3种Zr_(3)O晶形的晶体结构参数与实验结果一致。此外,证明3种Zr_(3)... 详细信息

采用第一性原理系统地研究3种Zr_(3)O晶形(空间群分别为R3c(斜方六面体)、R32(斜方六面体)和P6322(六面体))的晶格动力学及其与温度相关的热力学和力学性质。计算得到的3种Zr_(3)O晶形的晶体结构参数与实验结果一致。此外,证明3种Zr_(3)O结构在动力学和热力学上均具有稳定性。获得了3种Zr_(3)O晶形在0~1500 K温度范围内的熵、焓、吉布斯自由能、比热容、热膨胀系数和弹性模量等性质。发现3种Zr_(3)O晶形在0K时的相对稳定性顺序为Zr_(3)O(R3c)>Zr_(3)O(R32)>Zr_(3)O(P6_(3)22);然而,在50 K时Zr_(3)O(R3c)转变成Zr_(3)O(R32),在540K时转变为Zr_(3)O(P6_(3)22)。相较于其他2种Zr_(3)O相,Zr_(3)O(R32)表现出更优越的力学性能。

关键词：第一性原理 Zr_(3)O 晶格动力学热力学性质弹性模量