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, China;2.Nanjing University of Technology, Nanjing 210009, China) Abstract:In this work, a parametric approach is presented and utilized to determine the creep properties of weldments; then the model of creep strain for cross weld specimen is given. On the basis of the experimental results, attempt has been made to establish equations of the isochronous stress-strain for weld joint that can......
Tensile creep and corrosion properties of Mg-2%Ca based cast alloys Jeong-Min KIM1, Joon-Sik PARK1, Ki-Tae KIM2 1. Division of Advanced Materials Engineering, Hanbat National University, Daejeon... to Mg-2%Ca based alloy on the creep and corrosion characteristics was compared with Al addition. The creep resistance of Mg-2%Ca based alloy at 175 °C was improved by Zn addition more significantly than......
Creep Behavior and Microstructure Evolution of Sand–Cast Mg–4Y–2.3Nd–1Gd–0.6Zr Alloy Crept at 523–573 KY.H.Kang1,2,H.Yan1,R.S.Chen11. The Group of Magnesium Alloys and Their Applications,Institute of Metal Research,Chinese Academy of Sciences2. University of the Chinese Academy of Sciences摘 要:High temperature tensile–creep behavior of Mg–4Y–2.3Nd–1Gd......
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. Creep test was carried out at 200-300 ℃ under 50-120 MPa. Within the limits of the creep test conditions used in this study, the creep activation energy of the investigated alloys was in the range of 156-221 kJ/mol. The microstructure evolution during creep was characterized by optical metallography, SEM and TEM. The results show that the creep life of the alloy is increased from 52.2 to 152.8 h......
. However, the TEPMC and TEHPDC alloys have similar tensile strength around 67 MPa at 350 °C. Due to the coarsening of eutectic Si, the TEPMC alloy exhibits better creep resistance than the TEHPDC alloy under studied creep conditions. Therefore, the alloys with small size of eutectic Si are not suitably used at 350 °C. Key words: Al-Si-Cu-Ni-Mg alloy; thermal exposure; coarsening; creep behavior 1......
, uniaxial compression creep tests and permeability tests on bedded rock salt were performed. The results show that the decay creep and steady creep appear under unixial compression, and steady creep rate is kept at about 7.05×10-6/d. During the steady creep phase, microfissures stably propagate, and the differences in creep characteristics of the interlayer and that of rock salt make alternating beds......
; 文献标识码:A 文章编号:1672-7207(2009)03-0814-08 Creep model for rock mass considering normal creep of rock joint plane XIONG...) Abstract: Revised by Fish language, the normal stiffness and shear stiffness of interface element in FLAC3D were translated into creep functions of time, and the creep model for rock mass was realized......
degradation of the elastic modulus and failure strength of the material. The proposed model is used to simulate the instantaneous triaxial compression and the multi-loading creep tests. Generally, good... dependency, volumetric transition between compaction and dilatancy, and creep behavior. Key words: weak sandstone; elastoplasticity; creep behavior; constitutive model; microstructure 1 Introduction......
Trans. Nonferrous Met. Soc. China 30(2020) 1227-1237 Effects of pre-deformation mode and strain on creep aging bend-forming process of Al-Cu-Li alloy Jian-guo TANG1, Bo YU1, Jin ZHANG1,2, Fu-shun... Resources, Kunming 650031, China Received 30 July 2019; accepted 15 April 2020 Abstract: The bending deformation method was adopted to characterize the creep deformation behavior of Al-Cu-Li alloy......
