骆良顺,王富鑫,吴晓明,王亮,苏彦庆,史亚鸣,郭景杰,傅恒志.低成本Ti-Al-V-Fe-O钛合金热变形行为及热加工图[J].稀有金属材料与工程,2018,47(7):2049~2055.[Luo Liangshun,Wang Fuxin,Wu Xiaoming,Wang Liang,Su Yanqing,Shi Yaming,Guo Jingjie,Fu Hengzhi.Hot deformation and processing maps of Ti-Al-V-Fe-O alloy[J].Rare Metal Materials and Engineering,2018,47(7):2049~2055.]
低成本Ti-Al-V-Fe-O钛合金热变形行为及热加工图
投稿时间:2016-07-11  修订日期:2016-08-25
中文关键词:  低成本  热变形  本构方程  热加工图  
基金项目:云南省省院省校科技合作专项项目(2013IB006) 国家自然科学基金资助(项目号51425402,51331005)
中文摘要:
      通过真空非自耗熔炼炉制备了低成本Ti-6Al-2.5V-1.5Fe-0.15O合金,利用Gleeble-1500D热模拟机,研究了其热加工参数为:变形温度875℃-1100℃、应变速率0.001s-1-1s-1,变形量为70%时的热变形行为,建立了Ti-6Al-2.5V-1.5Fe-0.15O合金考虑应变量的Arrhenius本构方程,基于动态材料模型建立热加工图。研究结果表明:变形温度升高,应变速率降低,流变应力降低。通过本构方程计算可得两相区平均热激活能为398.824KJ/mol,远大于纯钛自激活能,表明热变形软化机制与动态再结晶有关。单相区热激活能为210.93KJ/mol,略大于纯钛自激活能,以动态回复为主。通过热加工图确定两个失稳区,中等变形温度(950℃-1070℃)高应变速率(0.31-0.1s-1)易发生绝热剪切,结合热加工图确定适合的加工区间:应变速率为0.001-0.01s-1,变形温度为875℃-925℃。
Hot deformation and processing maps of Ti-Al-V-Fe-O alloy
英文关键词:low cost  hot deformation  constitutive equations  processing map
英文摘要:
      The paper prepared the cast Ti-6Al-2.5V-1.5Fe-0.15O titanium alloys by the consumable vacuum arc furnace. Thermal simulation experiments are carried out by Gleebee 1500D, and different deformation temperatures (875℃-1100℃),train rates(0.001-1 s-1)and the same deformation degree(60%) were chose. Then phase equations of two phase and single based on Arrhenius model were built, considering the influence of strain. The processing map was built by DMM and Prasad instability criterion. The results show that the alloy is belonging to negative temperature and normal strain sensitivity material. The average thermal activation energy of two phase is 398.824KJ/mol,which is bigger than the pure titanium. The softening is related to the dynamic recrystallization softening mechanism. The average thermal activation energy of single phase is 210.93KJ/mol,slightly more than the pure titanium,The softening is related to the dynamic recovery. The two flow instability zones appear on the processing map,The adiabatic shearing easily happens at medium temperate from 950℃-1070℃ and the high strain rates from 0.31s-1 to 1s-1,The suitable zone for processing is in the strain rates from 0.001s-1to 0.1-1 and temperate from 875℃ to 925 ℃.
作者单位E-mail
骆良顺 哈尔滨工业大学 金属精密热加工国家级重点实验室 luols@hit.edu.cn 
王富鑫 哈尔滨工业大学 金属精密热加工国家级重点实验室 wxziyang@126.com 
吴晓明 西安航天发动机厂  
王亮 哈尔滨工业大学 金属精密热加工国家级重点实验室  
苏彦庆 哈尔滨工业大学 金属精密热加工国家级重点实验室  
史亚鸣 云南省钛材应用产品工程技术研究中心  
郭景杰 哈尔滨工业大学 金属精密热加工国家级重点实验室  
傅恒志 哈尔滨工业大学 金属精密热加工国家级重点实验室  
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