检索结果-南通市图书馆

Effect of oxygen addition and annealing time on microstructure and mechanical properties of Ti-34Nb alloy

Journal of Iron and Steel Research International 2023年第1期30卷 158-164页

作者： Jun-shuai Wang Wen-long Xiao Lei Ren Yu Fu Chao-li Ma Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education School of Materials Science and EngineeringBeihang UniversityBeijing 100191China

The effect of oxygen addition and annealing time on microstructure and mechanical properties of Ti-34Nb and Ti-34Nb-0.2O alloys was *** addition of O suppresses the martensitic *** phase composition changes from singleα''phase toα''+βphases with oxygen *** addition of oxygen increases strength significantly at as-received,cold-rolled,and annealed alloys through solid solution *** accumulation of abundance of defects and grain refinement introduced by cold rolling have a significant strengthening effect but also damage *** addition of oxygen increasesα/βtransformation temperature and promotes the precipitation ofαphase during annealing in Ti-34Nb-0.2O alloy.αprecipitates can inhibit grain growth during *** strength decreases with annealing time increased due to the increase in grain size in Ti-34Nb alloy,while the strength increases in Ti-34Nb-0.2O alloy mainly due to the precipitation ofα*** cold rolling followed by annealing and addition of oxygen can improve the properties of alloys.

关键词： Titanium alloy Oxygen addition annealing time αprecipitate

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of annealing time on microstructure and mechanical properties of cryorolled AISI 310S stainless steel

引用

Journal of Iron and Steel Research International 2023年第3期30卷 548-556页

作者： Xue-kui Lian Yong Li Yi Xiong Yong-li Wu Shun Han Tian-tian He Chun-xu Wang Feng-zhang Ren Central Iron and Steel Research Institute Co. Ltd.Beijing 100081China School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023HenanChina Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Luoyang 471023HenanChina

AISI 310S stable austenitic stainless steel was subjected to 90%cryorolling and then annealed at 800 ℃ for 2-60 *** effect of annealing time on the microstructure and mechanical properties was studied by optical microscopy,scanning electron microscopy,transmission electron microscopy,microhardness and tensile *** results show that the grain size of AISI 310S stainless steel is refined to the nanometer level after 90%cryorolling,and the grain size is approximately 20 *** the increase in annealing time,the degree of grain recrystallization occurs more fully and completely,as the grain begins to grow and then tends to *** strength and hardness of the annealed specimens decrease with increasing annealing time,while elongation tends to *** the annealing time is 10 min,the yield strength increases by about 2 times compared to that of the original austenite(unrolled),and the elongation is also above 20%,which is the best preparation process for ultra-fine grain austenitic stainless steel under this experimental *** the annealing time treatment increases,the fracture morphology changes from mixed quasi-cleavage and ductile fracture(after cryorolling)to ductile fracture(after annealing).

关键词： Austenitic stainless steel Cryorolling annealing time Microstructure Mechanical property

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Relationship of annealing time and intrinsic defects of unintentionally doped 4H-SiC

引用

Chinese Physics B 2010年第9期19卷 595-598页

作者：程萍张玉明张义门郭辉 Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian University

With annealing temperature kept at 1573 K, the effects of annealing time on stability of the intrinsic defects in epitaxial unintentionally doped 4H-SiC prepared by low pressure chemical vapour deposition have been studied by electron spin resonance （ESR） and low temperature photoluminescence. This paper reports the results shown that annealing time has an important effect on the intrinsic defects in unintentionally doped 4H-SiC when annealing temperature kept at 1573 K. When the annealing time is less than 30 min, the intensity of ESR and photoluminescence is increasing with annealing time prolonged, and reaches the maximum when annealing time is 30 min. Then the intensity of ESR and photoluminescence is rapidly decreased with the longer annealing time, and much less than that of as-grown 4H-SiC when annealing time is 60 min, which should be related with the interaction among the intrinsic defects during the annealing process.

关键词： intrinsic defects annealing time low temperature photoluminescence electron spin resonance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The effects of annealing time on the electrochemical performances of La0.55Nd0.15Pr0.05Mg0.25Ni3.3Al0.1 hydrogen storage alloy

The effects of annealing time on the electrochemical perform...

引用

第六届国际稀土开发与应用研讨会

作者： Fanqing KONG~(a,b,*),Huizhong YAN~(a,b),Wei XIONG~(a,b),Jin LI~(a,b),Baoquan LI~(a,b),Li WANG~(a,b) a.Baotou Research Institute of Rare Earths,Baotou 014030,China b.National Engineering Research Center of RE Metallurgy & Functional Materials,Baotou 014030,China

The electrochemical performances of LaNdPrMgNiAl hydrogen storage alloys annealed at 1123 K for 4 h、8 h、12 h、16 h were investigated in this *** was found that most of the electrochemical properties,such as the cycle life,the activation property,and the initial discharge capacity of the alloys,were improved after annealing treatment,except for the maximum discharge capacity(see Tab.1).High rate dischargeability(HRD)(see Fig.3),electrochemical impedance spectra(EIS),linear polarization,anode polarization,and potential-step studies indicate that the electrochemical kinetics of the alloy electrodes are deteriorated after annealing *** phenomenon can be ascribed to the decrease in the La(Ni,Al) catalytic activation phase after annealing treatment,which increases the charge-transfer resistance of the alloy electrodes and also reduces the rate of the diffusion of hydrogen from the interior of the bulk to the surface.

关键词： Hydrogen storage alloy RE-Mg-Ni system electrode alloy annealing time Electrochemical Kinetics

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Effects of pretreatment of substrates on the preparation of large scale ZnO nanotube arrays

引用

Rare Metals 2010年第1期29卷 21-25页

作者： GUO Xiao GUO Min ZHANG Mei WANG Xidong CHOU Kuo-Chih Department of Physical Chemistry. University qfScience and Technology Beijing Beijing 100083 China College of Engineering Peking University Beijing 100871 China

Well-aligned hexagonal ZnO nanotubes （NTs） arrays were synthesized on pretreated indium tin oxide （ITO） substrates by a simple hydro- thermal method. The morphology and structure of the products were characterized by scanning electron microscopy （SEM） and X-ray diffraction analysis （XRD）. A new method of substrate pretreatment was introduced to prepare ZnO coated films. The size of ZnO seeds and the formation rate of ZnO NTs were investigated. Further, the mechanism of the preparation of ZnO NTs was discussed. The photoluminescence （PL） spectrum measurement shows fairly internal defects existing in ZnO nanotubes.

关键词： nanotube arrays zinc oxide substrate pretreatment hydrothermal method annealing time

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Structure, Plastic Deformation of Polyethylene: A Molecular Dynamics Method

引用

Advances in Materials Physics and Chemistry 2020年第6期10卷 125-150页

作者： Dung Nguyen Trong Tuan Tran Quoc Hue Dang Thi Minh Cuong Nguyen Chinh Van Duong Quoc Faculty of Physics Hanoi National University of Education Ha Noi Vietnam Faculty of Basic Science University of Transport Technology Ha Noi Vietnam Faculty of Electrical and Electronics Engineering Thuyloi University Ha Noi Vietnam

This paper studies the influence factors of atoms number (N) at temperature (T) and after annealing time (t) on the structure shape and the plastic deformation of Polyethylene C2H4 (PE) by the Molecular Dynamics (MD) method with Dreading pair interaction, cyclic boundary conditions and plastic deformation of Polyethylene (PE) be done by stretching method according to the z-axis. The results of structure, plastic deformation of PE are analyzed through size (l), the total energy of the system (Etot), shape and associated energy (Ebond), angular binding energy (Eangle), energy Edihedral, interactive energy Vander Walls (Enon-bonding). When increasing N, t leads to the number of structural units of Face-Centred Cubic (FCC), Body-Centered Cubic (BCC) and Hexagonal Close-Packed (HCP) increasing, but Amorphous (Amor) decreases while the angle between the atoms is a constant corresponding to 109.5°. Besides, the length of the link (r) increases from r = 1.529 Å to r = 1.558 Å while the plastic deformation energy of PE gets an enormous change and the bonding angle at 109.27°. The length of the link r = 1.529 Å and the size (l) of the PE material increase from l = 3.7

关键词： Molecular Dynamics Atoms Number annealing time Polyethylene Plastic Deformation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：