• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Laser Materials Processing Vol.85e: Rapid Prototyping and Microfabrication, Nov 16-19, 1998, Orlando, FL USA >Microstructure of Laser Bent Aluminium Alloy Alclad 2024-T3
【24h】

Microstructure of Laser Bent Aluminium Alloy Alclad 2024-T3

机译：激光弯曲铝合金Alclad 2024-T3的显微组织

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A set of optical and SEM micrographs of the Aluminium Alloy Alclad 2024-T3 microstructure, which has been bent by means of a CO_2-laser beam, are presented showing the changes occurring to the grain structure as a consequence of this laser induced process. The laser bending variables used are: power (P), scanning velocity (v), beam diameter (D) and number of passes (N), all of them arranged into a parameter, (NS·P)/(D·v), called Accumulated Energy Density (AED in J/mm~2 ). For AED values below 25 J/mm the microstructure of the material showed presence of subgrain structures and incomplete recrystallization of small size grains in the upper region of the sheet. Higher AED values, in between 25 and 133 J/mm~2, caused recrystallization to take place fully, contrasting with the elongated crystal structure of the as-received material. In that AED range segregation of dispersoids at the grain boundaries occurred as well as partial melting of previously recrystallized grain. For AED values near to 133 J/mm~2 melting and resolidification of the upper region of the sheet, underneath its Alclad layer, took place leaving a cellular-dendritic structure. AED values ranging from 133 up to 250 J/mm~2, caused the Alclad layer to fuse together with the substrate.
机译：给出了一组铝合金的Alclad 2024-T3显微组织的光学和SEM显微照片，这些显微照片已经通过CO_2激光束弯曲，显示了由于这种激光诱导过程而导致的晶粒结构发生变化。所使用的激光弯曲变量是：功率（P），扫描速度（v），光束直径（D）和通过次数（N），所有这些都被排列成一个参数（NS·P）/（D·v） ，称为累积能量密度（AED单位：J / mm〜2）。对于低于25 J / mm的AED值，材料的微观结构显示出亚晶粒结构的存在，并且在板的上部区域出现了小尺寸晶粒的不完全重结晶。较高的AED值（在25至133 J / mm〜2之间）导致完全重结晶，这与所接收材料的细长晶体结构相反。在那个AED范围内，在晶界发生了弥散体的偏析以及先前再结晶晶粒的部分熔化。对于接近133 J / mm〜2的AED值，在其Alclad层之下，片材上部区域发生熔化和再固化，留下了细胞树突状结构。 AED值范围从133到250 J / mm〜2，导致Alclad层与基板融合在一起。

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