Main content area

Segregation of titanium powder with polydisperse size distribution: Spectral and correlation analyses

Klisiewicz, Pawel, Roberts, John A., Pohlman, Nicholas A.
Powder technology 2015 v.272 pp. 204-210
cost effectiveness, equipment, manufacturing, metallurgy, mixing, powders, titanium
Additive manufacturing with powder metallurgy is becoming a popular and cost effective process due to improvements in powder availability and the ability to produce a part close to the desired net shape. Because the particles have a variety of shapes and sizes, the flow of titanium powder may be hindered if it is not uniformly mixed, resulting in poor quality end products. Understanding how titanium powder flows, and how the flow is affected by various flow parameters is essential for the proper utilization in additive manufacturing. By studying the segregation of the distribution of many sizes of particles in titanium powder, proper flow conditions could be established in order to produce the highest quality end products as possible. The results of several analysis techniques indicate that the greatest mixing of industrial titanium powder occurs nearest the center of a rotating tumbler with the smallest diameter. This indicates that short flow distances are best if titanium parts with maximum homogeneity are sought.