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of joints CAO Ping, HUANG Lei, CHEN Yu, ZHOU Keping, DENG Hongwei (School of Resource and Safety Engineering, Central South University, Changsha 410083, China) Abstract: To study the whole creep process of jointed rock, nonlinear viscous element and joint fissures plastic body were introduced, and then combined with classical Burgers model in series to gain a new composite creep model. 1D and 3D......
Creep Behavior and Life Assessment of a Novel Heat-Resistant Austenite Steel and Its WeldmentYu Zhang1,2,Hong-Yang Jing1,2,Lian-Yong Xu1,2,Yong-Dian Han1,2,Lei Zhao1,2,Xi-Shan Xie31. School...:In the present study, creep activation energy for rupture was obtained as 221-348 kJ/mol for 22Cr15Ni3.5 CuNbN due to the precipitation-hardening mechanism......
Stress dependence of the creep behaviors and mechanisms of a third-generation Ni-based single crystal superalloyQuanzhao Yue,Lin Liu,Wenchao Yang,Chuang He,Dejian Sun,Taiwen Huang,Jun Zhang,Hengzhi Fu摘 要:Elevated temperature creep behaviors at 1100℃ over a wide stress regime of 120–174 MPa of a thirdgeneration Ni-based single crystal superalloy were......
蠕变共同控制.合金蠕变断裂主要受蠕变裂纹的形成与扩展的控制,蠕变断裂的方式为沿相界的剥离. 关键词:NiAl基合金；定向凝固；蠕变；蠕变断裂 中图分类号:TG146.5 文献标志码:A Tensile creep behavior of directionally solidified NiAl-Cr(Mo)-W/Nb alloy QI..., Shenyang 110016, China) Abstract: The microstructures before and after creep were also analyzed by SEM and TEM. The tensile creep behavior and mechanisms of directionally solidified (DS) NiAl-Cr(Mo......
Effect of surface recrystallization on the creep rupture property of a single-crystal superalloyZHANG Binga,LIU Changkuia,LU Xinb,TAO Chunhua,and JIANG Taoa a AVIC Failure Analysis Center,Beijing...="ChDivSummary">The effect of surface recrystallization by heating after shot-peening on the creep rupture property and fracture behavior of a single-crystal superalloy was investigated.The results show......
A modified θ projection model for constant load creep curves-I.Introduction of the modelChao Fu1,Yadong Chen1,Xiaofei Yuan1,Sammy Tin2,Stoichko Antonov1,Koichi Yagi3,Qiang Feng11. Beijing Advanced... long-term creep deformation and life of materials is an effective way to ensure the service safety and to reduce the cost of long-term integrity evaluation of high temperature structural materials.Since......
A modified theta projection model for creep behavior of RPV steel 16MND5Peng Yu,Weimin MaDivision of Nuclear Power Safety, Royal Institute of Technology (KTH)摘 要:During a hypothetical severe accident of light water reactors,the reactor pressure vessel(RPV) could fail due to its creep under the influence of high-temperature corium.Hence,modelling......
Effects of Stress Level and Stress State on Creep Ductility:Evaluation of Different ModelsJian-Feng Wen1,2,Shan-Tung Tu1,Fu-Zhen Xuan1,Xue-Wei Zhang1,Xin-Lin Gao31. Key Laboratory of Pressure Systems... on the development of strain-based approach for predicting the creep life or damage of components operating at elevated temperatures. Creep ductility, as a key parameter in this approach, may vary......
Influence of Temperature on Stacking Fault Energy and Creep Mechanism of a Single Crystal Nickel-based SuperalloySugui Tian1,Xinjie Zhu1,Jing Wu1,Huichen Yu2,Delong Shu1,Benjiang Qian11. Shenyang... crystal nickel-based superalloy during creep at elevated temperatures was investigated by means of calculating the stacking fault energy of alloy, measuring creep properties and performing contrast......
黏弹性体的剪切模量；ε11为三维状态下的轴向应变；σ1为轴向应力；σ3为围压. 2 蠕变模型参数的确定 2.1 蠕变破坏时间tF和岩石发生加速蠕变的时刻t* 经典的岩石蠕变曲线示意如图2所示,由图2可以确定2个时间参数,即蠕变破坏时间tF和岩石发生加速蠕变的时刻t*. 图2 经典的岩石蠕变曲线 Fig. 2 Classic rock creep curve 2.2 剪切模量G1和体积...100 mm,直径D为50 mm的标准圆柱体,对外观具有明显缺陷的试样进行剔除.制备得到的标准岩石试样如图3(a)所示. 图3 砂岩试样和蠕变试验系统 Fig. 3 Sandstone sample and creep test systems 试验设备采用MTS815.02试验系统如图3(b)所示.岩石的三轴力学特性试验步骤如下: 1) 将岩石试样两端均匀涂抹凡士林,保证测得试验数据不会受端部效......
