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of economical 21Cr-11Ni-N heat-resistant austenitic steel was investigated at 650 °C under different stress levels. It was found that RE could increase the time to creep rupture, especially at long-term creep duration. The logarithm of the time to creep rupture(lgtr) was a linear function of the applied stress(σ). RE addition was favorable to generating a high fraction of low-coincidence site lattice......
of economical 21Cr-11Ni-N heat-resistant austenitic steel was investigated at 650 °C under different stress levels. It was found that RE could increase the time to creep rupture, especially at long-term creep duration. The logarithm of the time to creep rupture(lgtr) was a linear function of the applied stress(σ). RE addition was favorable to generating a high fraction of low-coincidence site lattice......
for microstructure and properties of Ti(C,N)-based cermets, but 11 wt pct Mo2C has resulted in larger contiguity of Ti(C,N) grain and big Ti(C,N) grain diameter so as to reduce transverse rupture strength...EFFECT OF Mo AND Mo2C ON THE MICROSTRUCTURE AND PROPERTIES OF THE CERMETS BASED ON Ti(C,N) Y.N.Zhou1,W.Zhao2,W.H.Xiong2,S.Q.Zhou2 (1.The University of Waterloo, Waterloo ON, N2L3G1, Canada;2.School......
P92钢的蠕变行为研究赵强1,彭先宽1,丛相州1,安威1(1.北京市电力科学研究院北京国电富通科技发展有限责任公司)摘 要:在不同温度和压力条件下完成P92钢的蠕变及持久试验,采用SEM,TEM研究P92钢的强化机制及退化机制.持久试验外推强度同欧洲蠕变委员会公布的数据基本相同.Norton应力指数数值表明,高应力阶段的蠕变机制为位错蠕变.组织观察结果表明:P92钢的主要强化机制为位错强化及弥散强化,淬火得到的马氏体内部有高密度的位错,板条间的碳化物M23C6及弥散分布碳氮化物MX是P92钢热强性高的原因.随着......
Dielectric and Ferroelectric Properties of Complex Perovskite Ceramics Under Compressive Stress N. Triamnak1,A. Ngamjarurojana1,S. Ananta1,Y. Laosiritaworn1,M. Unruan, S. Wongsaenmai1,R. Yimnirun1... investigated under the influence of the compressive stress. The results showed that the dielectric properties, i.e. dielectric constant ( εr ) and dielectric loss ( tan δ), and the ferroelectric......
. Magnetic field properties caused by stress concentration [J]. Journal of Central South University of Technology, 2004, 11(1): 23-26. [9] OUYANG Zhen-hua, CAI Mei-feng, LI Chang-hong, XIE Mo-wen...J. Cent. South Univ. Technol. (2009) 16: 0085-0090 DOI: 10.1007/s11771-009-0014-6 Measurements of in situ stress and mining-induced stress in Beiminghe Iron Mine of China OUYANG Zhen-hua(欧阳振华)1......
Electrochemical techniques for monitoring stress corrosion cracking of Type 40Cr steel in acidified chloride solution AN Li-juan(安丽娟), LI Qing-fen(李庆芬) College of Material Science and Chemical...; Abstract: Electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) techniques were used to detect stress corrosion cracking (SCC) on 40Cr......
J. Cent. South Univ. Technol. (2008) 15(s1): 397-401 DOI: 10.1007/s11771-008-387-y Effects of stress conditions on rheological properties of granular soil in large triaxial rheology laboratory..., especially the stress level were the critical influencing factors of the rheological deformation properties. Under the low stress level (S=0.1), the granular soil showed the elastic properties......
J. Cent. South Univ. (2018) 25: 218-229 DOI: https://doi.org/10.1007/s11771-018-3731-x Effective stress law for rock masses and its application in impoundment analysis based on deformation..., are hardly to be explained by the conventional method. The scientific understanding of water effects during impoundment and their hazards to hydraulic structure are needed. The effective stress law......
University, Jinan 250061, China) Abstract: The microstructure evolution and its effect on the properties of GH2984 alloy between 700 and 750 ℃ were investigated. The results show the rupture life is only about... decreases, the stress concentration is released by the grain rotation. It inhibits the crack nucleation and thus extends the alloy rupture life obviously. However, accompanied with the grain deformation......