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兵工学报 ›› 2010, Vol. 31 ›› Issue (4): 482-485.

• 论文 • 上一篇    下一篇

2519铝合金第二相对靶材高速冲击变形的影响

陈希, 李伯龙, 聂祚仁   

  1. (北京工业大学 材料科学与工程学院, 北京 100124)
  • 收稿日期:2008-11-28 修回日期:2008-11-28 上线日期:2014-05-04
  • 通讯作者: 陈希 E-mail:f528866chenxi@126.com
  • 作者简介:陈希(1984—), 女, 硕士研究生
  • 基金资助:
    国家重点基础研究发展计划项目(2005CB623706)

The Effect of the Second Phases on the Target Deformation in 2519 Aluminum Alloy During High Velocity Impact

CHEN Xi, LI Bo-long, NIE Zuo-ren   

  1. (College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China)
  • Received:2008-11-28 Revised:2008-11-28 Online:2014-05-04
  • Contact: CHEN Xi E-mail:f528866chenxi@126.com

摘要: 利用扫描电子显微镜和透射电子显微镜研究了2519铝合金靶板在高速冲击变形过程中形变组利用扫描电子显微镜和透射电子显微镜研究了2519铝合金靶板在高速冲击变形过程中形变组织及第二相颗粒的演变特征。实验表明,在高速冲击塑性变形中,对于纳米级的针状Al2Cu弥散相,因局部较高塑性变形导致的温升使其部分发生回溶现象;而微米级的球形或准球形Al2Cu第二相粒子因在冲击过程中不易塑性变形,导致局部应力集中,可促使冲击微裂纹萌生和早期扩展。

关键词: 材料实验, AlCu合金, 第二相, 冲击变形, 微裂纹

Abstract: The evolutionary features of the microstructure and the second phase particles during high velocity impact deformation were investigated by using scanning electron microscope and transmission electron microscope. The experimental results show that the nano-scale precipitates (Al2Cu) with needle shape have been partly dissolved due to local temperature risen by bullet impact. Since the micron-scale second phase (Al2Cu) with spherical or near-spherical shape was difficult to deform during bullet impact, it resulted in sectional stress concentration , leading to the formation and early enlargement of micro-cracks.

Key words: material experiment, Al-Cu alloy, second phases, impact deformation, micro-crack

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