Abstract
In order to study the phenomenon of the weld pool free surface evolution from partial to full penetration in gas tungsten arc welding (GTAW), the measurement method based on the lattice laser reflection on the weld pool surface was designed. Lattice lasers information and the concavity-convexity in the weld pool free surface were analyzed. Based on the volume of fluid method and the basic principle of fluid mechanics, temperature field and the flow field model which considered the free surface in a fully penetrated weld pool in GTAW were established. Fluid flow including the factor of buoyancy force, electromagnetic force and surface tension gradient was numerically analyzed for a fully penetrated weld pool in stationary GTAW. The result shows that: thermal expansion of metals is the main reason for the convex surface of weld pool at partial penetration. When fully penetrated, the concave surface of the lower surface is greater than that of the upper surface.
| Original language | English |
|---|---|
| Pages (from-to) | 405-416 |
| Number of pages | 12 |
| Journal | Journal of Manufacturing Processes |
| Volume | 36 |
| DOIs | |
| State | Published - Dec 2018 |
Bibliographical note
Funding Information:This work was supported by the National Science Foundation of China (NSFC) [grant numbers 51205179 ]
Publisher Copyright:
© 2018 The Society of Manufacturing Engineers
Keywords
- Free surface
- Full penetration
- Partial penetration
- Stationary gas tungsten arc welding
ASJC Scopus subject areas
- Strategy and Management
- Management Science and Operations Research
- Industrial and Manufacturing Engineering