Weld repair—Analyze the failure before attempting the repair November 9, 2004 By: When something breaks, you acknowledge the shock, scratch your head, take stock of the situation, and look for the fastest way to repair the item and put it back into operation. The pressure to repair quickly is understandable, but common sense suggests stopping for a moment and trying to understand what caused the break before attempting the repair. Failure Analysis Almost anything can fracture. The science investigating the origins of fractures is called failure analysis, and it is used to establish responsibilities for fractures and to determine preventive measures for avoiding future occurrences. An introductory, interesting book on this subject was written by Donald J. Wulpi and is titled Understanding How Components Fail.
1 Service Failures This article discusses only in-service weldment breakage, also described as service failures. Weldments are assemblies with parts joined by welding. Failures occurring during or immediately following welding are easier to deal with, because all conditions are known. So if the item was welded originally, it should be weldable again for repair, right? Yes, but only if you know the materials and their conditions and whether they still are exactly as they were at fabrication time—no heat treatment or other surface conditioning has been introduced. You also must know the precise process and welding procedure that were used in the first place, which usually isn't the case. Mellerware Palermo Coffee Bar Instruction Manual here. Panotour Pro 2 3 Keygenguru more.