全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

冲击下材料质量混合的实验研究及离散元模拟

DOI: 10.11858/gywlxb.2004.01.005, PP. 21-26

Keywords: 质量混合,冲击加载,铅-锡,动态扩散系数,离散元

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用化爆驱动飞片对铅-锡和铜-铝的颗粒混合物进行冲击加载。回收样品的金相分析发现,在锡颗粒边界有明显的铅锡质量混合带,带宽约60~80μm。利用扫描电镜对混合带进行点扫描,得到带内铅和锡质量分布。计算出的铅锡动态扩散系数为D=0.9cm2/s,远高于准静态。利用离散元方法进行了数值模拟,定性的显示了高速冲击下材料细观混合的过程和机理。

References

[1]  Zemsky S V, Ryabchikov Y A, Epshteyn G N, et al. Mass Transfer of Carbon under the Influence of a Shock Wave [J]. Phys Met Metall, 1979, 46: 171.
[2]  Yang C, Hu J B. Diffusion of Tungsten Atom in Iron and Nickel under the Shock Loading [J]. Ordnance Material Science and Engineering, 1997, 3: 20. (in Chinese)
[3]  杨超, 胡金彪. 冲击载荷下钨在铁和镍中的扩散 [J]. 兵器材料科学与工程, 1997, 3: 20.
[4]  Balluffi R W, Ruoff A L. On Strain-Enhanced Diffusion in Metals. Ⅰ. Point Defect Models [J]. J Appl Phys, 1963, 34: 1634.
[5]  Ruoff A L, Balluffi R W. On Strain-Enhanced Diffusion in Metals. Ⅱ. Dislocation and Gain-Boundary Short-Circuiting Models [J]. J Appl Phys, 1963, 34: 1848.
[6]  Ruoff A L, Balluffi R W. On Strain-Enhanced Diffusion in Metals. Ⅲ. Interpretation of Recent Experiments [J]. J Appl Phys, 1963, 34: 2862.
[7]  Hart E W. On the Role of Dislocations in Bulk Diffusion [J]. Acta Met, 1957, 5: 597.
[8]  Ruoff A L. Enhance Diffusion during Plastic Deformation by Mechanical Diffusion [J]. J Appl Phys, 1967, 38: 3999.
[9]  Yano K, Horie Y. A Numerical Study of Shock-Induced Particle Velocity Dispersion in Solid Mixtures [J]. J Appl Phys, 1998, 84: 1292.
[10]  Horie Y, Sawaoka A B. Shock Compression Chemistry of Materials [M]. Tokyo: KTK Scientific Publishers, 1993. 160
[11]  Wang S P. Foundation of Metallographical Analysis [M]. Beijing: China Mechanical Press, 1987. 20. (in Chinese)
[12]  汪守朴. 金相分析基础 [M]. 北京: 机械工业出版社, 1987. 20.
[13]  Decker D L, Weiss J D, Vanfleet H B. Diffusion of Sn in Pb to 30 kbar [J]. Phys Rev B, 1977, 16: 2392.
[14]  Tang Z P, Horie Y, Psakhie S G. Discrete Meso-Element Modeling of Shock Processes in Powders [A]. Davison L. High-Pressure Shock Compression of Solids Ⅳ [C]. New York: Springer, 1997. 143-176.
[15]  Williamson R L. Parametric Studies of Dynamic Power Consolidation Using a Particle-Level Numerical Model [J]. J Appl Phys, 1990, 68: 1287.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133