Abstract
Applying compression and shear combined loading to pure iron, pure titanium and stainless steel powders with different hardness, the densification effect by shear loading was compared. For all powder the large density improvement by shear loading was seen. The density increment by shear loading greatly depended on the density namely residual cavities before shear loading. Then the density increment by shear loading was large for high hardness powder on 700MPa. However, on 300MPa the density increment for stainless powder was smaller than for titanium powder although the density before shear loading was lowest. This was because the plastic deformation of high hardness powder was not easily promoted even by shear loading in low compression pressure. The densification effect by compression and shear combined loading depends on the density before giving shear loading and the ease of powder plastic deformation.
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