TWI Industrial Member Report Summary 387/1988
By I D Harris
The review covers recent experimental evidence and current knowledge on the causes, formation and avoidance of porosity when TIG welding carbon steels, austenitic stainless steels, aluminium and its alloys, copper and its alloys, and nickel and its alloys.
The classification and appearance of the various types of porosity are described, with reference to relevant standards.
The possible effect of porosity on mechanical properties is outlined, and comparisons are drawn with the effects of other defect types.