Abstract
Liquation cracking was investigated in the partially melted zone (PMZ) in welds of Al-Si alloys, which are widely used as casting alloys and often rich in Si to ensure good castability. Alloy A357 (Al-7Si) was selected for studying liquidation cracking in castings repaired or joined by welding. The crack susceptibility was evaluated by the circular-patch test, and full penetration, gas metal arc made with filler metals 1100 (Al), 4043 (Al-5Si), 4047 (Al-12Si) and 5356 (Al-5Mg). It was observed that for liquation cracking to occur in the PMZ of high-Si, Al-Si casting alloys increases with decreasing Si content in a binary Al-Si weld metal.
| Original language | English |
|---|---|
| Pages (from-to) | 63-s-71-s |
| Journal | Welding Journal (Miami, Fla) |
| Volume | 84 |
| Issue number | 4 |
| State | Published - Apr 2005 |
Keywords
- Aluminum Alloys
- Backfilling
- Fraction Solid
- Heat-Affected Zone
- Liquation Cracking
- Partially Melted Zone
- Scheil Model