Hk. Seok et al., A 3-DIMENSIONAL MODEL OF THE SPRAY FORMING METHOD, Metallurgical and materials transactions. A, Physical metallurgy andmaterials science, 29(3), 1998, pp. 699-708
Citations number
18
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
A three-dimensional model has been formulated to calculate the shape o
f the general preform, using vector calculus. The shape of a rod, tube
, plate, or irregular preform can be calculated at given spray forming
conditions. The shape of a spray-formed rod was analyzed at various s
pray forming conditions using the three-dimensional model. The effects
of spray forming parameters, such as spray distribution parameters, a
ngular velocity of rotation, withdrawal velocity, spray angle, and ecc
entric distance on rod shape, were analyzed. The most important parame
ters affecting the shape of rods are the spray distribution parameters
and the withdrawal velocity. The dynamic evolution of rod shape with
a stepwise variation of the withdrawal velocity during spray forming w
as investigated. The effect of a stepwise change of the withdrawal vel
ocity was the same as that of the scanning atomizer. The calculated su
rface profiles were compared with those of spray-formed 7075 aluminum
alloy rods prepared on a pilot scale. The calculated results for the s
urface profiles were in agreement with those of the spray-formed rods.