Jc. Choi et al., FINITE-ELEMENT ANALYSIS OF COMPRESSION HOLDING STEP IN SEMISOLID FORGING AND EXPERIMENTAL CONFIRMATION, Journal of materials processing technology, 80-1, 1998, pp. 450-457
Citations number
11
Categorie Soggetti
Material Science","Engineering, Manufacturing","Engineering, Industrial
The technology of semi-solid forging (SSF) has been actively developed
to fabricate near-net-shape products using light and difficult to for
m materials. Generally, the SSF process is composed of slug heating, f
orming, compression holding and an ejecting step. After the forming st
ep in SSF, the slug is compressed during a certain holding time in ord
er to completely fill the die cavity and to accelerate the solidificat
ion rate. The compression holding time that can affect microstructural
characteristics, mechanical properties and the shape of products is i
mportant. This paper presents a procedure to predict the compression h
olding time for obtaining the final shape of the product. Information
is preheated temperature and the solid fraction for a cylindrical slug
in the compression holding step of a closed-die compression process u
sing heat transfer analysis and considering latent heat, by means of t
he finite element method. The influence of the predicted compression h
olding time on microstructural characteristics, mechanical properties
and shape of the product is investigated by experiment. (C) 1998 Elsev
ier Science S.A. All rights reserved.