Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.
This paper discusses the residual deformation modelling of
a complex shaped stainless steel AISI316L component heated
to 900C and quenched with a water spray subcooled to 80K.
The paper shows that accurate deformation modelling of the
problem necessitates not only an adequate mathematical
formulation of the physical system but also the application of
precise thermal and mechanical boundary conditions.
Correlations of experimentally measured spatio-temporal heat
transfer coefficients found valid for spray Reynolds numbers,
Res Gdd f
, of 6×10-2 < Re < 3 and spray Weber
numbers,
2
s d f We G d , of 4.6×10-7 < We < 4.1×10-2
used in the calculation are presented. These boundary
conditions are used in a finite element model (FEM) to enable
predictions of the deformation history of a complex geometry
subjected to spray quenching. The results of the modelling are
compared to the deformed shape of the processed component.
The excellent agreement between the modelling and experiment
suggest that the method used to analyse this problem is
consistent and may be applied to determine the residual stress
and strain formation of complex shaped components subjected
to a spray quench with great accuracy. The results of this study
provide the opportunity to do life assessments with reliable
residual stress and strain predictions which may be applied to
components such as electronic chips, aluminium extrusions or
metal sheet rollers.
