Dj. Sharman et al., Alleviation of quenching residual stresses by cold working the necks of seamless 6351 aluminium alloy thick-walled gas cylinders, INT J PRES, 75(14), 1998, pp. 971-977
Citations number
36
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
The application of a compressive axial load to the apex of a gas cylinder n
eck results in the generation of Poisson-induced tensile circumferential st
resses at the bore. As the compressive axial load is increased in magnitude
, the stress distribution in the gas cylinder neck increases until finally
yielding occurs at a specific location on the bore. Provided that the maxim
um compressive axial load is of sufficient magnitude, significant compressi
ve residual circumferential stresses are generated at the bore. The purpose
of this remedial action is to alleviate residual stresses that are introdu
ced into the gas cylinder neck during the quenching stage of the manufactur
ing process. A destructive technique has been employed to determine quenchi
ng residual stresses in the neck of one production gas cylinder neck. This
residual stress distribution is compared with one obtained by employing the
destructive technique on a gas cylinder that has been cold worked by axial
loading. Results indicate that tensile quenching residual circumferential
stresses at the bore can be favourably modified resulting in compressive ci
rcumferential residual circumferential stresses at the bore. (C) 1999 Elsev
ier Science Ltd. All rights reserved.