典型文献
Thermal cycling creep properties of a directionally solidified superalloy DZ125
文献摘要：
Aero-engine turbine blades may suffer overheating during service,which can result in severe microstruc-tural and mechanical degradation within tens of seconds.In this study,the thermal cycling creep under(950℃/15 min+1100℃/1 min)-100 MPa was performed on a directionally solidified superalloy,DZ125.The effects of overheating and thermal cycling on the creep properties were evaluated in terms of creep behavior and microstructural evolution against isothermally crept specimens under 950℃/100 MPa,950℃/270 MPa,and 1100℃/100 MPa.The results indicated that the thermal cycling creep life was reduced dramatically compared to the isothermal creep under 950℃/100 MPa.The plastic creep deformation mainly occurred during the overheating stage during the thermal cycling creep.The thermal cycling creep curve exhibited three stages,similar to the 1100℃isothermal creep,but its minimum creep rate oc-curred at a lower creep strain.The overheating events caused severe microstructural degradation,such as substantial dissolution of y'phase,earlier formation of rafted y'microstructure,widening of the y chan-nels,and instability of the interfacial dislocation networks.This microstructural degradation was the main reason for the dramatic decrease in thermal cycling creep life,as the thermal cycling promoted more dis-locations to cut into y'phase and more cracks to initiate at grain boundaries,carbides,and residual eutectic pools.This study underlines the importance of evaluating the thermal cycling creep properties of superalloys to be used as turbine blades and provides insights into the effect of thermal cycling on directionally solidified superalloys for component design.
文献关键词：
中图分类号：
作者姓名：
Wenrui An;Satoshi Utada;Xiaotong Guo;Stoichko Antonov;Weiwei Zheng;Jonathan Cormier;Qiang Feng
作者机构：
Beijing Advanced Innovation Center for Materials Genome Engineering,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China;Institut Pprime,UPR CNRS 3346,Department of Physics and Mechanics of Materials,ISAE-ENSMA,BP40109,86961 Futuroscope Chasseneuil Cedex,France;China Electronic Product Reliability and Environmental Testing Research Institute,Guangzhou 510610,China;Department of Microstructure Physics and Alloy Design,Max-Planck-Institut für Eisenforschung GmbH,Düsseldorf 40237,Germany
文献出处：
引用格式：
[1]Wenrui An;Satoshi Utada;Xiaotong Guo;Stoichko Antonov;Weiwei Zheng;Jonathan Cormier;Qiang Feng-.Thermal cycling creep properties of a directionally solidified superalloy DZ125)[J].材料科学技术（英文版）,2022(09):269-284
A类：
min+1100,crept,curred,rafted
B类：
Thermal,cycling,creep,properties,directionally,solidified,DZ125,Aero,engine,turbine,blades,may,suffer,overheating,during,service,which,can,severe,mechanical,degradation,within,tens,seconds,In,this,study,was,performed,effects,were,evaluated,terms,behavior,microstructural,evolution,against,isothermally,specimens,results,indicated,that,life,reduced,dramatically,compared,plastic,deformation,mainly,occurred,curve,exhibited,three,stages,similar,but,its,minimum,rate,lower,strain,events,caused,such,substantial,dissolution,phase,earlier,microstructure,widening,nels,instability,interfacial,dislocation,networks,This,reason,decrease,promoted,more,locations,cut,into,cracks,initiate,grain,boundaries,carbides,residual,eutectic,pools,underlines,importance,evaluating,superalloys,provides,insights,component,design
AB值：
0.445037
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