摘要
以新型高强韧TC18钛合金为例,研究了双圆锥台试样热变形规律。基于热模拟试验,获得TC18钛合金的高温流变行为,采用Arrhenius双曲正弦函数建立TC18钛合金的本构方程。对双圆锥台试样热变形进行有限元模拟,获得了压缩后变形试样纵向截面的应变梯度分布。对比双圆锥台试样不同应变区域与相同变形条件下GLEEBLE热模拟试样的α相平均晶粒尺寸,结果表明一个双圆锥台试样上可以快速获取多个不同应变条件的热变形组织。
A new type of TC18 titanium alloy with high strength and toughness was taken as a sample to study the thermal deformation law of the specimen on a double cone.Based on the thermal simulation experiments,the high⁃temperature rheological behavior of TC18 titanium alloy was obtained,and a constitutive equation was established for the TC18 titanium alloy with the Arrhenius hyperbolic⁃sine function.The thermal deformation of the double cone specimen was simulated by using finite⁃element method,and the strain gradient distribution at longitudinal section of the deformed sample after compression was obtained.Based on the comparison of the mean grain size ofα⁃phase in the double cone specimen in different strain region and GLEEBLE thermal simulation specimen under the same deformation conditions,it is found that several thermal deformation structures under different strain conditions can be quickly obtained from the double cone specimen.
作者
毛颖
雷雨
丁旭
张晓泳
汪冰峰
樊凯
冯抗屯
谢静
王海鹏
雷家峰
MAO Ying;LEI Yu;DING Xu;ZHANG Xiao-yong;WANG Bing-feng;FAN Kai;FENG Kang-tun;XIE Jing;WANG Hai-peng;LEI Jia-feng(School of Material Science and Engineering,Central South University,Changsha 410083,Hunan,China;Chinalco Luoyang Copper Industry Co Ltd,Luoyang 471039,Henan,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,Hunan,China;Hunan Gold Sky Titanium Technology Co Ltd,Changde 413000,Hunan,China;AVIC Landing Gear Advanced Manufacturing Corp,Changsha 410200,Hunan,China;China National Erzhong Group Deyang Wanhang Die Forging Co Ltd,Deyang 618000,Sichuan,China;Xi′an Triangle Defense Incorporated Company,Xi′an 710089,Shaanxi,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2020年第5期128-133,共6页
Mining and Metallurgical Engineering
基金
粉末冶金国家重点实验室自主课题(621021721)
湖南省创新科技项目(2017GK2292)
国家自然科学基金面上项目(51771231)。
关键词
钛合金
TC18
双圆锥台
热变形
应变梯度分布
有限元模拟
titanium alloy
TC18
double cone
thermal deformation
strain gradient distribution
finite element simulation
作者简介
毛颖(1997-),女,湖北荆门人,硕士研究生,主要研究方向为钛合金高通量变形技术与微观结构;通讯作者:汪冰峰(1978-),男,湖南岳阳人,副教授,博士,主要从事材料动态行为研究工作。
