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Steady State Creep Rate Equation of Inconel 718 Superalloy韩雅芳,M.C.Chaturvedi摘 要:<正> The steady state creep rate equdtion ofa nickel base superalloy... and 853-943K, respecti-vely. Constant stress tensile creep tests wereused to medsure the values of steady state creeprate, εs, and the consecutive stress reductionmethod was used to measure the back stress......
and the related constants were determined. The constitutive relationship among steady creep strain rate,tested stress and aging temperature of 2219 aluminum alloy was obtained. The results show that the steady creep rate increases with the increase of tested stress and aging temperature. And the second step in creep curves becomes short. The average relative error of steady creep strain rate between......
, the logarithmic value of the steady creep rate vs stress has linear relation, and with increasing load, the steady creep rate of the sintered uranium dioxide pellet increases. Under the same load, the steady... of compression by the least square method. The slope of line is rate of steady creep. 3 Experimental results Table 1 shows the steady creep rate of uranium dioxide pellets with different grain sizes (9.0......
Trans. Nonferrous Met. Soc. China 22(2012) s650-s655 Effect of strain, strain rate and temperature on workability of AZ80 wrought magnesium alloy Wen-quan, QUAN Guo-zheng, YU Chun-tang, ZHAO... wrought magnesium alloy was studied in the temperature range of 523-673 K and the strain rate range of 0.01-10 s-1 using hot compression tests. Through the flow stresses behavior, the processing maps......
a significant creep property, but only transient and steady state appear under low stress. Increased stress causes creep intensified and lateral strain gradually exceeds axial strain. In the failure stage, it has characteristics of large axial plastic deformation, obvious volumetric ductility dilation and large steady creep rate. The accelerated creep appears shortly after transient loading under......
A, MARTINEZ-VASQUEZ J J, SANTAMARINA J C. Strain-rate effects in Mexico City soil [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(2): 300-305. [6] LADE P V, LIU C T. Modelling creep...J. Cent. South Univ. Technol. (2009) 16: 0658-0662 DOI: 10.1007/s11771-009-0109-0 Strain rate effects on sand and its quantitative analysis LI Fu-lin(李福林)1, 2, PENG Fang-le(彭芳乐)1, 2, LI Jian......
, the creep strain and creep strain rate of steady state increase with the increment of water content, and also the steady state creep strain rate is enhanced with the increment of deviatoric stress. Through... Steady state creep rate vs water content From Fig.7, it is concluded that water content has great influence on creep strain and steady state creep strain rate of mudstones. In the state of nature or when......
J. Cent. South Univ. Technol. (2008) 15(s1): 043-046 DOI: 10.1007/s11771-008-311-5 Constitutive model depending upon temperature and strain rate of carbon constructional quality steels YANG Liu... the same temperature and different strain rates, and the same strain rate and different temperatures were done on 20 steel, 35 steel and 45 steel. 52 groups of rheological stress-strain curves were......
Al-Cu-Mg-Ag耐热铝合金高温蠕变行为刘晓艳1,潘清林1,陆智伦1,曹素芳1,何运斌1,李文斌1(1.湖南省长沙市中南大学材料科学与工程学院)摘 要:在100-210℃和150-300 MPa的条件下,研究了Al-5.3Cu-0.8Mg-0.5Ag-0.3Mn-0.15Zr耐热铝合金的蠕变行为,探讨了时效状态对合金高温性能的影响.结果表明:在相同蠕变条件下,欠时效态合金的稳态蠕变速率远远低于峰时效态合金.在210℃/200 MPa下,欠时效态合金的蠕变断裂时间为75 h,而峰时效态合金的蠕变断裂时间仅为2......
°C exhibits the conventional two-stage creep behaviour (seen in Figure 3), which comprises of a primary creep stage where creep strain rate decreases quickly and a steady-state secondary creep stage... is mostly responsible for a transient steady creep stage during the early creep ageing stage. After that, a slight decrease in creep strain rate until reaching a stable level would be dominant by the growth......