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The Influence of Some key Parameters on Fatigue Life of Common metallic Components

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Journal of Central South University 2000年第3期12卷 159-161页

作者： LIU Yi lun (College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, china) College of Mechanical and Electrical Engineering Central South University Changsha China

The effect of key parameters on fatigue life of common metallic components, e.g. steel, aluminium alloy, has been analysed quantitatively. The influential coverage and degree of these parameters have been investigated systematically, some phenomena which can′t be discovered with qualitative analysis method have been revealed, a series of valuable conclusions has been obtained, which would be very beneficial to fatigue resistant design and improvement of anti fatigue ability of metallic components.

关键词： metallic material component fatigue life key parameter effect

Crystallization in Zr_(60)Al_(15)Ni_(25) bulk metallic glass subjected to rolling at room temperature

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Science china(Technological Sciences) 2010年第1期53卷 278-283页

作者： YAN ZhiJie,YAN Jun,HU Yong & DANG ShuE School of materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,china School of materials Science and Engineering Taiyuan University of Science and Technology Taiyuan China

The microstructure evolution of Zr60Al15Ni25 bulk metallic glass during rolling at room temperature is investigated by differential scanning calorimetry(DSC),high-resolution transmission electron microscopy(HRTEM) and selected area electronic diffraction(SAED).The HRTEM images show that shear bands are produced in the rolled specimens,indicating the essence of inhomogeneous deformation due to rolling,and that there exist nanocrystals with size of about 5-10 nm in the transition regions between the shear bands and the undeformed matrix in the rolled specimens with deformation degrees of 80% and 95%.Based on the polyhedral structure model and the shear transformation zone(STZ) theory,the influence of viscous flow,free volume,viscosity and the stress situation on the crystallization behaviors in the metallic glass during rolling is discussed.

关键词： metallic glasses plastic deformation nanocrystallization free volume

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电脉冲消除45钢淬火件的残余应力

浙江大学学报（工学版） 2012年第8期46卷 1407-1411页

作者：郑建毅何闻施彦彬浙江大学流体传动及控制国家重点实验室浙江省先进制造技术重点实验室现代制造工程研究所浙江杭州310027 厦门大学机电工程系福建厦门361005

为了研究电脉冲消除金属材料内部残余应力的效果,通过储能电容器放电产生高能电脉冲,对淬火后的45优质碳素结构钢冷轧薄板件进行放电处理,采用小孔法测定电脉冲处理前后试样内残余应力的变化规律.用于电脉冲处理的脉冲电流为指数衰减的... 详细信息

为了研究电脉冲消除金属材料内部残余应力的效果,通过储能电容器放电产生高能电脉冲,对淬火后的45优质碳素结构钢冷轧薄板件进行放电处理,采用小孔法测定电脉冲处理前后试样内残余应力的变化规律.用于电脉冲处理的脉冲电流为指数衰减的振荡波形,同时满足第一个主峰的电流密度为12.2kA/mm2,单次处理的振荡脉冲持续时间小于0.8ms.试验结果表明,经过电脉冲处理后,45钢淬火件中2个主方向残余应力的幅值均出现较为显著的降低,且两者都出现均化效果.

关键词：电脉冲 45钢残余应力小孔法

时效对00Cr13Ni6Mo马氏体不锈钢韧性和断裂的影响

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上海钢研 1999年第4期 16-21页

作者：姚丽姜上海市金属功能材料开发应用重点实验室

本工作研究了两种合金添加剂的马氏作时效不锈钢在不同的时效工艺下脆性产生的规律和断裂表面特征,对脆化本质进行了探讨。讨论了断口剪切区面积与韧性的关系,以及合金元素、时效过程与断裂方式之间的关系。

关键词：时效断裂韧性马氏体不锈钢不锈钢

A new asymmetric Fabry-Pérot interferometric cavity for fiber optical sensors

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A new asymmetric Fabry-Pérot interferometric cavity for fib...

高导磁纳米晶Fe_(67.9)Cu_(0.5)Nb_(0.6)Cr_3V_1Si_(14)B_(13)合金的高频磁性能

Photonics Asia 2004;Sensors and Imaging

作者： Shaoji Jiang,Xi Zhu,Hezhou Wang* State key laboratory of Optoelectronic materials and Technologies Zhongshan(Sun Yat-Sen) University,Guangzhou,510275,china

Fiber optical Fabry-Pérot (F-P) interferometric sensors have been used for the measurement of various physical parameters. A novel miniature asymmetric F-P interferometric cavity applied to fiber opti

关键词： fiber optical sensors,Fabry-Perot interferometric structure,metallic film

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金属功能材料 2003年第5期10卷 4-8页

作者：张延忠上海市金属功能材料应用开发重点实验室上海200940

报道了新开发的纳米晶Fe67 9Cu0 5Nb0 6Cr3 V1Si14 B13 合金的综合磁性能。新合金的直流起始磁导率和矫顽力水平分别为 7 8× 10 4和 0 8Am-1。在 Bm =0 3T ,f=10 0kHz和Bm =0 2T ,f=2 0 0kHz条件下 ,铁损分别为5 4 4kW·m-3 和 83... 详细信息

报道了新开发的纳米晶Fe67 9Cu0 5Nb0 6Cr3 V1Si14 B13 合金的综合磁性能。新合金的直流起始磁导率和矫顽力水平分别为 7 8× 10 4和 0 8Am-1。在 Bm =0 3T ,f=10 0kHz和Bm =0 2T ,f=2 0 0kHz条件下 ,铁损分别为5 4 4kW·m-3 和 830kW·m-3 ,这可与纳米晶Fe73 5Cu1Nb3 Si13 5B9的相比 ,但比优良的功率Mn Zn铁氧体H7c4的低得多。在直到 1MHz的频率范围内考查了弱场磁导率的频散特性。在 f =2 0 ～ 10 3 kHz和Bm =0 0 1～ 1 0T范围内 ,考查了高频矫顽力和Bm 的关系。在 f=2 0～ 10 3kHz和Bm =0 0 5～ 0 9T范围内 ,描述了铁损和 f及Bm 的关系。

关键词： Fe67.9Cuo.5Nb0.6Cr3V1Si14B13合金纳米晶起始磁导率矫顽力铁损软磁合金

Research on Ce-Zr compounds on modifying γ-alumina washcoat on FeCrAl foils

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Rare Metals 2005年第4期24卷 306-312页

作者： HUANG Ying SHEN Meiqing WANG Jun JIA Liwei key laboratory for Green Chemical Technology of State Education Ministry School of Chemical Engineering ＆ Technology Tianjin UniversityTianjin 300072 China

Ce-Zr compounds such as Cc0.68Zr0.3202 solid solution, Ce/Zr nitrate and CeO2/ZrO2 were added into γ-alumina-based slurries, which were then loaded on FeCrAl foils pretreated at 950℃ and 1100℃. The microstructures and adhesion performance between the substrates and the washcoats were measured by SEM, BET surface area, ultrasonic vibration and thermal shock test. The results show that the addition of Ce0.68Zr0.32O2 solid solution, Ce/Zr nitrate and CeO2/ZrO2 into the slurries can improve γ-Al2O3-based washcoat adhesion on FeCrAl foils. Furthermore, ceria-zirconia solid solution increases the adhesion of the washcoat on the surface of an FeCrAl foil than the two others. The specific surface area of this washcoat remains about 4345 m^2/g and the weight loss is below 4.0% even after aging test of 10% steam-containing air at 1050℃ for 20 h.

关键词： chemical reaction engineering γ-alumina washcoat surface area Ce-Zr compounds metallic substrates

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Melt Fragility

Melt Fragility

Review: Perspectives on the metallic interconnects for solid oxide fuel cells

第七届全国液体和软物质物理学术会议

作者： Xiufang Bian key laboratory for Liquid-Solid Structural Evolution and Processing of materials,Ministry of Education, Shandong University,Jinan 250061,P.R.china

Melt fragility is defined as the viscosity variation rate of the melts towards the liquidus temperature and is expressed by the fragility parameter:M =|(?)η/η(T)1)/(?)T/T|T=T Where T is the liquidus temperature andη(T) is the viscosity at the liquidus *** has been found that M has a close relation with the glass forming ability(GFA) in the metallic amorphous ***,by calculation of the M,the glass-forming ability of

关键词： melt fragility glass-forming ability metallic alloys

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2004年第12期 3-35页

作者： ZHU Wei-zhong, YAN Mi(State key Lab of Silicon materials, Zhejiang University, Hangzhou 310027, china) (Research & Development Division, Nanoolynamics Inc. Buffolo, NY, 14203, USA)

The various stages and progress in the development of interconnect materials for solid oxide fuel cells (SOFCs) over the last two decades are reviewed. The criteria for the application of materials as interconnects are highlighted. Interconnects based on lanthanum chromite ceramics demonstrate many inherent drawbacks and therefore are only useful for SOFCs operating around 1000℃. The advance in the research of anode-supported flat SOFCs facilitates the replacement of ceramic interconnects with metallic ones due to their significantly lowered working temperature. Besides, interconnects made of metals or alloys offer many advantages as compared to their ceramic counterpart. The oxidation response and thermal expansion behaviors of various prospective metallic interconnects are examined and evaluated. The minimization of contact resistance to achieve desired and reliable stack performance during their projected lifetime still remains a highly challenging issue with metallic interconnects. Inexpensive coati

关键词： Solid oxide fuel cells (SOFCs) Interconnects metallic materials