1、 18 3 S 2008 M 3 Vol.18 No.3 The Chinese Journal of Nonferrous Metals Mar. 2008 cI| 1004-0609(2008)03-0505-06 Johnson-Cook TC16 1“ ; jb ( 2v S 410083) K 1 InstronA Ls T Hopkinson F L 298773 KaM q 0.001 15 550/sS = TC16 %# Hq/ iM wLi Johnson-Cook Esb4 E Johnson-CookZeLZE iM wL?Z t E 6 bTV M q9F79F 9F
2、7 M q 105/s# 673 K H N H / TC16 1“ ? z TC16 M b 1oM TC16 1“ Hopkinson k M q ms | TG 113.2 DS M A Dynamic constitutive relationship of TC16 titanium alloy based on Johnson-Cook model YANG Yang, ZENG Yi, WANG Bing-feng (School of Materials Science and Engineering, Central South University, Changsha 41
3、0083, China) Abstract: The true stressitrue strain curves of Ti-3%Al-5%Mo-4.5%V alloy with a wide range of strain rates were investigated under uniaxial quasi-static tension and uniaxial dynamic compression respectively with Instron 8032 test machine and the split Hopkinson bar. A new method incorpo
4、rating the stressstrain curve of Ti-3%Al-5%Mo-4.5%V alloy was proposed for determining the parameters based on Johnson-Cook model easily and avoiding the estimation of adiabatic temperature rising. The Johnson-Cook dynamic constitutive relationship for Ti-3%Al-5%Mo-4.5%V alloy was obtained. The resu
5、lts show that the true stress increases with increasing strain rate, while decreases with increasing temperature. Under the condition of high strain rate of 105/s and temperature above 673 K, the true stress is even less than that under quasi-static condition. Good agreement is obtained between the
6、model prediction and the experimental stressstrain curves for Ti-3%Al-5%Mo-4.5%V alloy under both quasi-static and dynamic loadings. Key words: TC16; dynamic constitutive relationship; SHPB; strain rate; temperature TC16 ,t b n5 7?B (BT16) , f + . TC16 # 30CrMnSiA d J. S/ , 2006, 25(7): 765770. TAN
7、Zhen, LIU Dao-xin, ZHANG Guang-lai, ZHANG Xiao-hua, WANG Xiao-feng, LIU Jun. Fatigue behavior of TC16 titanium alloy bolts and 30CrMnSiA steel joint holesJ. Mechanical Science and Technology, 2006, 25(7): 765770. 5 Y , , g . M LD7 h Y J. S , 2003, 11(1): 5558. LIU Fang, SHAN De-bin, LU Yan. Influenc
8、e of thermo-deformation parameters on the flow stress of LD7 aluminum alloyJ. Materials Science and Technology, 2003, 11(1): 5558. 6 , ; , + , l , . BT20M J. S , 2005, 13(1): 6669. SHU Ying, ZENG Wei-dong, ZHOU Jun, ZHOU Yi-gang, S 2008 M 3 510ZHOU Lian. A study of hot deformation behavior for BT20
9、alloyJ. Materials Science and Technology, 2005, 13(1): 6669. 7 SEO S, MIN O, YANG H. Constitutive equation for Ti-6Al-4V at high temperatures measured using the SHPB techniqueJ. International Journal of Impact Engineering, 2005, 31(6): 735754. 8 KIM J H, SEMIATIN S L, LEE C S. Constitutive analysis
10、of the high-temperature deformation mechanisms of Ti-6Al-4V and Ti-6.85Al-1.6V alloysJ. Mater Sci Eng A, 2005, 394(1/2): 366375. 9 LI L X, LOU Y, YANG L B, PENG D S, RAO K P. Flow stress behavior and deformation characteristics of Ti-3Al-5V-5Mo compressed at elevated temperaturesJ. Materials and Des
11、ign, 2002, 25(3): 451457. 10 KIM H Y, HONG S H. High temperature deformation behavior and microstructural evolution of Ti-47Al-2Cr-4Nb intermetallic alloysJ. Scripta Materialia, 1998, 38(10): 15171523. 11 WANG Yang, ZHOU Yuan-xin, XIA Yuan-ming. A constitutive description of tensile behavior for bra
12、ss over a wide range of strain ratesJ. Mater Sci Eng A, 2004, 372: 186190. 12 RS . B f8 M J. v , 2001, 19(3): 476479. GUO Wei-guo. Plastic flow behav ior of a new austenitic stainless steel AL6-XN under different strain rates and temperaturesJ. Journal of Northwestern Polytechnical University, 2001,
13、 19(3): 476479. 13 NEMAT-NASSER S, ISAACS J B, STARRETT J E. Hopkinson techniques for dynamic recovery experimentsJ. Proceedings of the Royal Society London, 1991, 435(A): 371391. 14 WANG Yang, XIA Yuan-ming. A modified constitutive equation for unidirectional composites under tensile impact and the dynamic tensile properties of KFRPJ. Composites Science and Technology, 2000, 4(1): 591596. 15 , . g MC#?Z t J. S , 2002, 12(3): 401408. YANG Yang, CHENG Xin-lin. Current status and trends in researches on adiabatic shearingJ. The Chinese Journal of Nonferrous Metals, 2002, 12(3): 401408. (I C )
