Dynamic Behavior and Constitutive Model for Two Tantalum-Tungsten Alloys under Elevated Strain Rates

被引：4

作者：

Fei, Gao ^{[1
]}

Zhang Xianfeng ^{[1
]}

Ahmad, Serjouei ^{[2
]}

Wang Mingyang ^{[1
]}

Lei, Li ^{[1
]}

Wei, Xiong ^{[1
]}

Jiang, Zhang ^{[3
]}

机构：

[1] Nanjing Univ Sci & Technol, Nanjing 210094, Jiangsu, Peoples R China

[2] Nanyang Technol Univ, Singapore 639798, Singapore

[3] China Acad Ordnance Sci, Ningbo Branch, Ningbo 315103, Zhejiang, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 10期

关键词：

tantalum-tungsten alloys; SHPB; dynamic behavior; Taylor impact; constitutive model; STEEL PROJECTILES; FRACTURE MODES; IMPACT TESTS; TAYLOR TEST; DEFORMATION; METALS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quasi-static and dynamic deformation behavior of two Ta-W alloys (Ta-2.5W and Ta-10W, mass fraction) was investigated by the quasi-static and dynamic compression test and Split Hopkinson pressure bar (SHPB) and Taylor impact tests. The results show that the yield stress of Ta-W alloys exhibits sensitivity to strain rate and W content. Based on the quasi-static and high strain-rate experimental data, the material constants in Johnson-Cook (JC) model were obtained for the two Ta-W alloys. In addition, validation of the derived constitutive model was carried out through comparison of Taylor impact inhomogeneous deformations under high strain rate (10(3)similar to 10(4) s(-1)), obtained from simulations with their experimental counterparts. It is shown that the simulation results agree well with post-test geometries in terms of side profiles and impact-interface footprints for Taylor impact tests. To bridge the different spatial scale involved in the process of tantalum-tungsten alloy deformation, a meso-scale research was proposed via optical microscope (OM) image analysis. The results presented in this paper, provide new insights into the mechanisms suitable for the constitutive relations determination process.

引用

页码：2753 / 2762

页数：10

共 24 条

[1] Bai R, 2008, RARE METAL MAT ENG, V37, P1526
[2] Brar NS, 2007, AIP CONF PROC, V955, P627, DOI 10.1063/1.2833171
[3] Numerical simulation of Taylor impact tests
Bruenig, Michael
Driemeier, Larissa
[J]. INTERNATIONAL JOURNAL OF PLASTICITY, 2007, 23 (12) : 1979 - 2003
[4] Chen S R, 1996, LANL REPORT LA UR
[5] Constitutive behavior of tantalum and tantalum-tungsten alloys
Chen, SR
Gray, GT
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (10): : 2994 - 3006
[6] Deformation and failure modes of soft steel projectiles impacting harder steel targets at increasing velocity
Chen, X. W.
Chen, G.
Zhang, F. J.
[J]. EXPERIMENTAL MECHANICS, 2008, 48 (03) : 335 - 354
[7] High-Strain-Rate Deformation: Mechanical Behavior and Deformation Substructures Induced
Gray, George T. , III
[J]. ANNUAL REVIEW OF MATERIALS RESEARCH, VOL 42, 2012, 42 : 285 - 303
[8] Johnston G. B., 1983, Proceedings of the 37th annual meeting of the Northeastern Weed Science Society, 1983., P51
[9] KOCK W, 1989, JOM-J MIN MET MAT S, V41, P33
[10] Dynamics of metal foam deformation during Taylor cylinder-Hopkinson bar impact experiment
Lopatnikov, SL
Gama, BA
Haque, MJ
Krauthauser, C
Gillespie, JW
Guden, M
Hall, IW
[J]. COMPOSITE STRUCTURES, 2003, 61 (1-2) : 61 - 71

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