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temperature results in strengthening the intensity of physical ageing, which demonstrates the mechanical mechanism why the polymer at a high temperature is easier to ageing. Finally, the master creep curves...J. Cent. South Univ. Technol. (2008) 15(s1): 582-588 DOI: 10.1007/s11771-008-426-8 Effects of stress and physical ageing on nonlinear creep behavior of poly(methyl methacrylate) ZHAO Rong-guo(赵......
and its mechanism, creep resistance models, and creep- fatigue-environment interaction and its mechanism were introduced. Key word: superalloy; creep mechanism; creep resistance model; creep-fatigue...] Table 3 Stress index, apparent activation energy and creep mechanism of five Ni-based superalloys at steady-state creep stage[6] 表 4 晶粒取向对DZ417G合金980 ℃蠕变性能的影响[11] Table 4 ......
On Grain Size Dependence of Minimum Creep Rate李培恩摘 要:<正> The available experimental results have beensummarized concerning the effect of grain size onminimum creep rate.There are two types of creeprate-grain size relations.One is that there is a criti-cal grain size above which creep rate is independentof grain size,below which creep rate......
] TIAN S G, ZHANG B S, SHU D L, et al. Creep properties and deformation mechanism of the containing 4.5Re/3.0Ru single crystal nickel-based superalloy at high temperatures[J]. Materials Science... show that the creep life of alloy at (1100 ℃, 140 MPa) is measured as 476 h. During steady state creep at high temperature, the deformation mechanism of alloy is dislocation slipping in γ matrix......
the hardening mechanism is in the highest flight, creep presents decay creep stage. When the damage mechanism is in the highest flight, creep presents accelerated creep stage. When they are close, creep...J. Cent. South Univ. Technol. (2009) 16: 0488-0494 DOI: 10.1007/s11771-009-0082-7 Viscoelasto-plastic rheological experiment under circular increment step load and unload and nonlinear creep......
, the microstructure and creep mechanism of Hf-containing K416B as-cast Ni-based superalloy with high W content were investigated. The results show that the as-cast microstructure of the alloy consists of γ matrix...; creep behavior; fracture mechanism 由于高钨镍基铸造高温合金具有良好的热强性和承温能力,被认为是制造航空发动机涡轮导向叶片和高温模具的首选材料[1-2].在20世纪60年代,国外已研制出一批高钨镍基合金并投入使用,其典型牌号有M21,M22,WAZ-16和IN-591等[3-4],其中,合金成分的调整方向为降低Cr含量,提高γ'相形成元素(Al,Ti和Nb)及固溶......
of a threshold stress due to an interaction between the dislocations and Cu-rich precipitates during creep deformation.The creep mechanism is associated with the dislocation climbing governed...Steady-State Creep Behavior of Super304H Austenitic Steel at Elevated TemperaturesPing Ou1,2,Long Li1,Xing-Fei Xie1,Jian Sun11. Shanghai Key Laboratory of Advanced High-Temperature Materials......
diffusion. Key words: copper alloys; alumina dispersion strengthened alloy; high temperature mechanical behavior; creep behavior; fracture; strengthening mechanism 1 Introduction Alumina dispersion... performed on it so far. et al [11] discussed the creep behaviors of Cu-1.5%Al2O3 alloy in two distinctly different temperature intervals, and the results showed that creep mechanism was sensitive......
Finite element analysis of γ′-phase raft mechanism in Ni-based single crystal superalloy WU Wen-ping(吴文平), GUO Ya-fang(郭雅芳), WANG Yue-sheng(汪越胜) Institute of Engineering Mechanics... in a single crystal Ni-based superalloy with the [001] orientation. The results show that the creep and rafting are closely related with the stress and strain energy density distributions in the matrix......
by means of nanoindentation technique.The creep mechanism was explored by characterization of creep rate sensitivity,creep compliance and retardation spectra.The results showed that the experimental...Indentation creep behaviors of Mg61Cu28Gd11 and (Mg61Cu28Gd11)99.5Sb0.5 bulk metallic glasses at room temperature孙颖迪,李子全,刘劲松,从孟启,秦静雅College of Materials Science and Technology Nanjing University......