Investigating Material and Component Failure - TCR Engineering ...
Investigating Material and Component Failure - TCR Engineering ...
Investigating Material and Component Failure - TCR Engineering ...
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WELD FAILURE ANALYSIS<br />
Help eliminate common welding problems <strong>and</strong> discontinuities such as:<br />
• Weld Discontinuities<br />
• Undercutting<br />
• Excessive melt-through<br />
• Incomplete fusion<br />
• Incomplete joint penetration<br />
• Porosity<br />
• Weld metal cracks<br />
• Heat affected zone cracks<br />
MIG Welding<br />
Gas Metal Arc Welding (GMAW) is frequently referred to as MIG welding. MIG<br />
welding is a commonly used high deposition rate welding process. Wire is<br />
continuously fed from a spool. MIG welding is therefore referred to as a<br />
semiautomatic welding process. MIG Welding Benefits are:<br />
• All position capability<br />
• Higher deposition rates than SMAW<br />
• Less operator skill required<br />
• Long welds can be made without starts <strong>and</strong> stops<br />
• Minimal post weld cleaning is required<br />
Common MIG Welding Problems are:<br />
• Heavily oxidized weld deposit<br />
• Irregular wire feed<br />
• Burnback<br />
• Porosity<br />
• Unstable arc<br />
• Difficult arc starting<br />
<strong>Failure</strong> <strong>and</strong> Root Cause Analysis White Paper by <strong>TCR</strong> <strong>Engineering</strong>, India 21
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