Numerical analysis of fluid transport phenomena and spiking defect formation during vacuum electron beam welding of 2219 aluminium alloy plate
详细信息 查看全文
- 作者：Chengcai Liu ; liuchengcai1983@163.com" class="auth_mail" title="E-mail the corresponding author ; Jingshan He
- 关键词：Vacuum electron beam welding ; Mathematical model ; Heat transfer ; Fluid flow ; Keyhole backfilling ; Spiking defect
- 刊名：Vacuum
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：132
- 期：Complete
- 页码：70-81
- 全文大小：5356 K
文摘
- •
Heat transfer, fluid flow, keyhole dynamics and spiking formation during the 2219 Al alloy EBW process are investigated.
- •
Effects of beam current on vapour jetting velocity, vapour pressure, keyhole temperature and keyhole depth are analysed.
- •
Insufficient duration time and low heat flux at bottom keyhole facilitate spiking formation in partially-penetrated weld.