• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>CIRP Conference on Electro Physical and Chemical Machining >Effects of Pseudo-spark Discharge Pulsed Electron Beam Irradiation on the Microstructure and Properties of 6061 Aluminum Alloy
【24h】

Effects of Pseudo-spark Discharge Pulsed Electron Beam Irradiation on the Microstructure and Properties of 6061 Aluminum Alloy

机译：伪火花放电脉冲射线辐射对6061铝合金微观结构和性能的影响

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The evolutions of the microstructure and properties of 6061 aluminum alloy irradiated by the pulsed electron beam generated by pseudo-spark discharge is the main focus of this paper. The pseudo-spark discharge is a low-pressure, transient discharge which has been recognized as a high efficient electron beam source with the rapid current growth of ～10~(12) A/s, high power density of ～10~9 W/cm~2, short-duration pulse of 10~2～10~3ns and self-focusing beam diameter of 0.5～6mm. These characteristics enable the material treated by the pseudo-spark pulsed electron beam to melt and cool rapidly, and form the fine grain structure. In this work, the evolutions of the micromorphology and surface properties of 6061 aluminum alloy and the influences of the beam parameters are investigated and analysed. The corrosion resistance of the surface is investigated by the electrochemical corrosion experiments. The mechanism of the "crater" in the surface microstructure formed by the pseudo-spark pulsed electron beam under varying beam accelerating voltages is also analysed and discussed. The experimental results in this paper demonstrate that the re-melting layer of the material surface appears after the given pseudo-spark pulsed electron beam irradiations, and "large crater" morphology forms under higher voltage. The homogenization of the element distributions on the surface and reduction of the impurity on the re-melting layer after given pulsed electron beam treatments are capable of improving the mechanical properties of the alloy workpiece surface, and the corrosion resistance of the surface is also increased after given pulsed electron beam treatments.
机译：由伪火花放电产生的脉冲电子束照射的6061铝合金的微观结构和性能的演变是本文的主要焦点。伪火花放电是低压，瞬态放电，该瞬态放电已被识别为高效的电子束源，其快速的电流生长〜10〜（12）/ s，高功率密度为约10〜9 w / CM〜2，短持续时间脉冲10〜2〜10〜3ns，自聚焦光束直径为0.5〜6mm。这些特性使得由伪火花脉冲电子束处理的材料快速熔化和冷却，并形成细粒结构。在这项工作中，研究了6061铝合金微晶和表面性能的演变和光束参数的影响。通过电化学腐蚀实验研究了表面的耐腐蚀性。还分析并讨论了在不同光束加速电压下由伪火花脉冲电子束形成的表面微观结构中的“火山口”的机制。本文的实验结果表明，在给定的伪火花脉冲电子束照射之后，材料表面的重新熔化层出现在更高电压下的“大陨石坑”形态形成。在给定脉冲电子束处理后，在重新熔化层上的杂质上的表面分布和减少杂质的均匀化能够改善合金工件表面的机械性能，并且在表面之后也增加了表面的耐腐蚀性给定脉冲电子束处理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号