典型文献
Hot deformation behavior and processing maps of Ti-15Al-12Nb alloy
文献摘要：
The isothermal hot compression tests of Ti-15Al-12Nb alloy under wide range of strain rates(0.01-10.00 s-1)and deformation temperatures(950,1000,1050,and 1100℃)were carried out using Gleeble-3500 thermo-simulation machine.A constitutive equation represented as a function of temperature,strain rate and true strain was developed,and the hot deformation appar-ent activation energy is calculated to be about 453 kJ·mol-1.By employing dynamic material model(DMM),the processing maps of Ti-15Al-12Nb alloy at various strains were established.Maximum efficiency of about 57％for power dissipation is obtained at high temperature and low strain rate.Owing to the high power dissipation efficiency and excellent processing ability in dynamic recrystallization(DRX)zone for metal material,the optimum processing conditions are selected as the temperature range of 1050-1100℃and the strain rate range of 0.01-0.10 s-1.Using transmission electron microscopy(TEM)studies,it is found that the dislocation density is directly associated with the value of processing efficiency.It is observed that when the processing effi-ciency is about 22％,the dislocation density is reasonably large.The flow instability region occurs at strain rate of 10.00 s-1 with cracks,which should be avoided during hot processing to obtain the required mechanical properties.
文献关键词：
中图分类号：
作者姓名：
Ravindranadh Bobbili;Vemuri Madhu
作者机构：
Defense Metallurgical Research Laboratory,Hyderabad 500058,India
文献出处：
引用格式：
[1]Ravindranadh Bobbili;Vemuri Madhu-.Hot deformation behavior and processing maps of Ti-15Al-12Nb alloy)[J].稀有金属（英文版）,2022(07):2316-2323
A类：
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Hot,deformation,behavior,processing,maps,Ti,15Al,12Nb,alloy,isothermal,hot,compression,tests,under,wide,range,rates,temperatures,were,carried,using,Gleeble,thermo,simulation,machine,constitutive,equation,represented,function,true,was,developed,appar,activation,energy,calculated,about,kJ,By,employing,dynamic,material,model,DMM,various,strains,established,Maximum,efficiency,power,dissipation,obtained,high,Owing,excellent,recrystallization,DRX,zone,metal,optimum,conditions,are,selected,Using,transmission,electron,microscopy,TEM,studies,found,that,dislocation,density,directly,associated,value,It,observed,when,reasonably,large,flow,instability,region,occurs,cracks,which,should,avoided,during,required,mechanical,properties
AB值：
0.529197
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