Abstract
This paper reports research into the microstructures and properties of electron beam welding (EBW) joints of a Ti alloy sheet. To control the TC4 sheet joint formation during electron beam welding is not an easy task. However, the electron beam current has a significant influence on joint formation and a good appearance of a T-joint can be obtained by increasing the heat input and using the electron beam scan method. It was found that all acicular martensite in the fusion zone (FZ) consisted primarily of α' phase titanium, with some β phase present. Grain coarsening occurred in the heat-affected zone (HAZ) due to transformation of the β phase. Butt joints possessed high strength, hardness of the fusion zone, and the heat-affected zone of these joints performed better than that of the parent metal. The highest shear strength of T-joint was 615 MPa and the fracture mechanism was a gliding fracture. Copyright:
| Original language | English |
|---|---|
| Pages (from-to) | 32-36 |
| Number of pages | 5 |
| Journal | China Welding (English Edition) |
| Volume | 20 |
| Issue number | 3 |
| State | Published - Sep 2011 |
Keywords
- Electron beam welding
- Joint microstructure
- Mechanical property
- Titanium alloy sheet
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