Author M. Miyahara1) and K. Tokimasa2) 1) Corporate Research & Development Laboratories
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Sumitomo Metal Industries
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Ltd.
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Amagasaki
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Japan2) Department of Mechanical Engineering
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School of BiologyOriented Science and Technology
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Kinki University
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Uchitacho
,
Wakayama
,
JapanManuscript received 18 October 1998
金属学报(英文版)
The authors recent works on the improvement of the Strain Range Partitioning(SRP) method and its application to the life prediction of high temperature structural components are summarized. Examined components are divided into three groups, that is, components in the steel production plants, in the automobile and in the fossil power plants. Based on the results of the inelastic analysis and the creepfatigue properties of the material, which were obtained by IJ(=PP,PC, CP, CC) tests, the effects of the material properties, operating conditions and configuration of components were quantitatively evaluated to select the most effective measures for the thermal fatigue life extension. The SRP has been successfully applied until now to the life prediction and extension of the actual structural components subjected to thermal cycling by the authors.
关键词:
creepfatigue
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null
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null
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Author K. Tokimasa1) and M. Miyahara2) 1) Department of Mechanical Engineering
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School of BiologyOriented Science and Technology
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Kinki University
,
Uchitacho
,
Wakayama
,
Japan2) Corporate Research & Development Laboratories
,
Sumitomo Metal Industries
,
Ltd.
,
Amagasaki
,
JapanManuscript received 18 October 1998
金属学报(英文版)
The two procedures based on the strain range partitioning approach are proposed for evaluating the remaining life by measuring the surface crack length. Both the procedures require that the material parameters describing the creepfatigue damage rule built and modified by the authors and the strain waveform applied have been clarified before the evaluation. One of the procedures can be used only when the total number of the operation cycles n are known, whereas the other is useful even when n is unknown, though it needs the additional crack length measurement. In the latter the surface crack length must be measured not only at n but also at n+n, where n is a given interval of cycles. The results of their application to Mod.9Cr1Mo and 316LC steel smooth specimens subjected to the IJ type creepfatigue loading are shown.
关键词:
creepfatigue
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null
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null
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null
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Author X.A. Zhang1)
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H.Q. Xia1)
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Z.T. Wu1)
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Y.F. Han1)
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R. Shi2) and G.X. Hu2) \= 1) Mechanical Properties Laboratory
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Beijing Institute of Aeronautical Materials
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Beijing 100095
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China2) The State Education Commission Open Research Laboratory for High Temperature
金属学报(英文版)
Materials and Testing, Shanghai Jiao Tong University, Shanghai 200030, ChinaManuscript received 18 October 1998 The threestage creep behavior of DD3 single crystal superalloy had been studied. The results show that the creeprupture properties of DD3 single crystal satisfy the requirements for high performance turbine blade application. The influence of crystal orientation on the creeprupture property of DD3 single crystal was tested and discussed. An engineering criterion to evaluate the regimes of secondary and tertiary creep is proposed, and this method gives a reasonable result for practical applications. The fractography and TEM micrography of the tested specimens had been studied, and it is determined that the glidecontrolled creep is the basic creep mechanism of DD3 single crystal at intermediate temperature, but the thermally activated processes become dominant at higher temperature.
关键词:
threestage creep curve
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null
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null
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null
李国栋
稀有金属材料与工程
综述了1997年～1998年间若干磁性功能材料在研究和应用方面的若干新进展.这些新进展包括:(1)非晶和纳米晶软磁材料;(2)新的磁效应与新的磁性功能材料;(3)磁共振成象在显示生物活体电性等上的应用;(4)磁力显微镜的新应用;(5)磁浮火车从研究、试验和走向应用.
关键词:
软磁材料
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新的磁效应
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磁共振成象
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磁力显微镜
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磁浮火车
中国腐蚀与防护学报
N。1Atmospheric Corrosivlty for Steels………………………………………………… .LIANG Caideng HO[I i。-tat（6）Caustic Stress Corrosion Cr。king of Alloy 800 Part 2.The Effect of Thiosul执e……………………………………… KONG De-sheng YANG Wu ZHAO Guo-zheng HUANG De.ltL。ZHANG Yu。。he CHEN She。g-bac（13）SERS slid E16CttOCh6iniC81 Stlldy Of Illhibit1Oli M6ch＆tllsth Of ThlollY68 Oil ITOll ID H....
关键词:
Corrosion Science
The SCC susceptibility of 18Cr-9Ni-Ti austenitic stainless steel in 0.5 mol.dm(-1) HCl + 0.5 mol.dm(-3) NaCl solution and the inhibiting effect of benzotriazole (BTA) on SCC and general corrosion were investigated by slow strain rate testing (SSRT), transient current measurements during fast strain rate testing (FSRT) under potentiostatic condition, scanning electron microscopy (SEM), potentiodynamic polarization measurements and electrochemical impedance spectroscopy (EIS) measurements. The results indicated that the inhibitive action of BTA can be attributed to its adsorption and inhibiting the anodic dissolution of the metal by the effect of blocking the active sites on the metal surface. (C) 1998 Elsevier Science Ltd. All rights reserved
关键词:
stainless steel;EIS;polarization;SEM;stress corrosion
