Indy/Life. Eating disorders such as anorexia and bulimia cost the country more than Â£15bn a year, according to the first analysis of the financial effects of the problems.
The centerline crack show on this fillet weld is the result of. low melting point material segregation (or segregation weld. cracking). Crater cracking occurs when the welding operator stops welding prior to finishing a pass on a weld joint, leaving a wide, thin depression at the end.
To weld aluminum you need a tig welder utilizing an inert gas to shield the arc. The problem with welding aluminum is that aluminum melts at 1200 degrees but aluminum oxide melts at 3700 degrees. </p><p>First a really clean piece of aluminum and even then there is a small amount of aluminum oxide.