Open Access
Table 2
The summary of observed keyhole behaviors.
| M/316L joints | AZ31/316L | Nb/316L | A5754/316L | Cu/316L |
|---|---|---|---|---|
| Tvap M < Tvap316L | Tvap M > Tvap316L | a M < a 316L | a M << a 316L | |
| χmax M/316L | 8.4 | 4.7 | 4.5 | 3.3 |
| amax M | 1 | 0.72 | 0.56 | 0.39 |
| amax 316L | 0.93 | 0.89 | 0.88 | 0.85 |
| Root position | Root on AZ31 | Centered root | Root on 316L | Root on 316L |
| Area in metal M | 80% | 40% | 40% | 40% |
| Drilling rate | V ≈ VAZ31 | V ≈ V316L | VA5754 < V < V316L | V << V316L |
| Controlling factor | Tvap MA> Tvap MB | kM >200 W · m−1 · K−1 | ||
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