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Creep rupture behavior and microstructural evolution of modified 9Cr-1Mo heat-resistant steel 被引量:3
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作者 fa-cai ren He Wang +1 位作者 Xiao-ying Tang Fei Chen 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2018年第12期1303-1310,共8页
High-temperature creep rupture behavior of modified 9Cr-lMo steel used for steam cooler was investigated at temperature of 838 and 923 K and stress ranging from 100 to 250 MPa.Based on the analysis of creep rate-time ... High-temperature creep rupture behavior of modified 9Cr-lMo steel used for steam cooler was investigated at temperature of 838 and 923 K and stress ranging from 100 to 250 MPa.Based on the analysis of creep rate-time curves,it is found that the creep rupture life decreases with the increase in the applied stress and temperature.The creep damage tolerance factor has been identified as a value of 8.In the normalized and tempered condition,the studied steel shows typical martensitic microstructure with Cr-rich M23C6 and Nb-or V-rich MX precipitates.Moreover,the Laves phase has been found along the grain boundaries.The fracture morphology characterized by field emission scanning electron microscope is adopted to reveal the creep failure mechanisms.The investigated results indicate the occurrence of the transgranular fracture under all the creep test conditions. 展开更多
关键词 Creep RUPTURE BEHAVIOR MODIFIED 9Cr-1Mo steel MICROSTRUCTURAL evolution FRACTOGRAPHY
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Constitutive Modeling for Elevated Temperature Flow Behavior of30Cr2Ni4MoV Ultra-super-critical Rotor Steel
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作者 Fei CHEN fa-cai ren +1 位作者 Zhen-shan CUI Xin-min LAI 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2014年第5期521-526,共6页
In order to perform numerical simulation of forging and determine the hot deformation processing parameters for 30Cr2Ni4MoV steel, the compressive deformation behaviors of 30Cr2Ni4MoV steel were investigated at the te... In order to perform numerical simulation of forging and determine the hot deformation processing parameters for 30Cr2Ni4MoV steel, the compressive deformation behaviors of 30Cr2Ni4MoV steel were investigated at the temperatures from 970 to 1270 ℃ and strain rates from 0. 001 to 0.1 s-1 on a Gleeble-3500 thermo-mechanical simulator. The flow stress constitutive equations of the work hardening-dynamical recovery period and dynamical recrystallization period were established for 30Cr2Ni4MoV steel. The stress-strain curves of 30Cr2Ni4MoV steel predicted by the proposed model well agreed with experimental results, which confirmed that the proposed equations can be used to determine the hot deformation processing parameters for 30Cr2Ni4MoV steel. 展开更多
关键词 30Cr2Ni4MoV steel hot compression dynamical recrystallization flow stress
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