The constitutive responses of Ti-6.6Al-3.3Mo-1.8Zr-0.29Si alloy at high strain rates and elevated temperatures
The constitutive responses of Ti-6.6Al-3.3Mo-1.8Zr-0.29Si alloy at high strain rates and elevated temperatures
复制标题
Ti-6.6Al-3.3Mo-1.8Zr-0.29Si 合金在高应变率和高温下的本构响应
DOI：
10.1016/j.jallcom.2015.05.131
复制
发表时间：
2015-10
影响因子：
6.2
通讯作者：
Wang, Yu
中科院分区：
文献类型：
--
作者：
Zhang, Jun;Wang, Yang;Zan, Xiang;Wang, Yu
系统研究了应变速率和温度对Ti-6.6Al-3.3Mo-1.8Zr-0.29Si合金单轴拉伸响应的影响。采用分体式霍普金森拉杆进行动态拉伸和回复试验，获得合金在高应变率下的绝热和等温应力-应变响应。实验表明，该合金的拉伸行为与应变速率和温度有关。初始屈服应力的值随着应变速率的增加和温度的降低而增加，而等温应变硬化行为在整个范围内的探索与应变速率和温度变化不大。绝热温升是高速变形过程中应变硬化率降低的主要原因。扫描电镜观察表明，拉伸试样的断裂方式为韧性断裂。对基于唯象的Johnson-Cook本构模型进行了适当的修正，使之能够描述Ti-6.6Al-3.3Mo-1.8Zr-0.29Si合金的速率-温度相关变形行为。在所研究的应变速率和温度范围内，模型关联式与实验数据吻合良好。
The effects of strain rate and temperature on the uniaxial tension responses of Ti-6.6Al-3.3Mo-1.8Zr-0.29Si alloy are systematically investigated over a wide range of strain rates, 0.001–1150 s−1, and initial temperatures, 293–573 K. Dynamic tension and recovery tests are conducted using a split-Hopkinson tension bar to obtain the adiabatic and isothermal stress-strain responses of the alloy at high strain rates. The experiments reveal that the tension behavior of the alloy is dependent on the strain rate and temperature. The value of initial yield stress increases with increasing strain rate and decreasing temperature, whereas the isothermal strain-hardening behavior changes little with strain rate and temperature over the full ranges explored. The adiabatic temperature rise is the main reason for the reduction of strain hardening rate during the high-rate deformation process. SEM observations indicate that the tension specimen is broken in a manner of ductile fracture. The phenomenologically based constitutive model, Johnson–Cook model, is suitably modified to describe the rate-temperature dependent deformation behavior of Ti-6.6Al-3.3Mo-1.8Zr-0.29Si alloy. The model correlations are in good agreement with the experimental data within the investigated range of strain rates and temperatures.
登录
查看更多内容
DOI：
10.1007/s11661-003-0013-4
发表时间：
2003-11
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
Dong-Geun Lee;Sunghak Lee;C. Lee;Sun-Moo Hur
通讯作者：
Dong-Geun Lee;Sunghak Lee;C. Lee;Sun-Moo Hur
影响因子：
8.4
作者：
Kotkunde, Nitin;Deole, Aditya D.;Singh, Swadesh Kumar
通讯作者：
Singh, Swadesh Kumar
影响因子：
9.4
作者：
Fundenberger, JJ;Philippe, MJ;Esling, C
通讯作者：
Esling, C
影响因子：
2.4
作者：
LUNTZ, RD;GRIFFIN, RM;CHOU, SC
通讯作者：
CHOU, SC
DOI：
10.1098/rspa.1991.0150
发表时间：
1991-11-08
期刊：
PROCEEDINGS OF THE ROYAL SOCIETY-MATHEMATICAL AND PHYSICAL SCIENCES
影响因子：
--
作者：
NEMATNASSER, S;ISAACS, JB;STARRETT, JE
通讯作者：
STARRETT, JE