Current testing requirements for high temperature alloys are defined in general industry specifications (ASTM, AMS), as well as in user specifications. Many of these requirements were established in the 1960's when production practices were yet to be refined.
cowling - protective covering consisting of a metal part that covers the engine; there are powerful engines under the hoods of new cars; the mechanic removed the cowling in order to repair the plane's engine.
Define cowl: a hood or long hooded cloak especially of a monk; a draped neckline on a woman's garment a hood or long hooded cloak especially of a monk; a draped neckline on a woman's garment; a chimney covering designed to improve the draftâ¦ See the full definition