Effects of Processing Parameters on the Impact Toughness of Metal Injection Molded Parts
Metal Injection Molding (MIM) parts typically offer higher density and better mechanical properties than conventional P/M and at a cost savings when compared to parts machined from wrought material. However, the use of MIM parts in many demanding applications has been limited by toughness considerations. Studies have shown that the toughness values of individual MIM parts can vary widely, both within a production run and from one producer to another. In this study, unnotched Charpy impact bars were used to evaluate the toughness of MIM samples. The values were analyzed for statistical comparisons to typical wrought values. The effect of MIM processing variables on the average impact toughness and the distribution of toughness values will be reported in this paper. The processing variables will cover the molding, debinding, and sintering steps, as well as post-sinter heat treatments. Recommendations for improving both toughness and reproducibility of toughness will be presented.
J. A. Sago and J. W. Newkirk, "Effects of Processing Parameters on the Impact Toughness of Metal Injection Molded Parts," Proceedings of the Advances in Powder Metallurgy and Particulate Materials (2001, New Orleans, LA), pp. 737 - 748, Metal Powder Industries Federation, May 2001.
2001 International Conference on Powder Metallurgy & Particulate Materials (2001: May 13-17, New Orleans, LA)
Materials Science and Engineering
Keywords and Phrases
Debinding; Metal Injection Molding (MIM); Corrosion; Fatigue of Materials; Fracture Toughness; Grain Size and Shape; Microstructure; Porosity; Sintering; Tensile Strength; Weibull Distribution; Injection Molding
International Standard Serial Number (ISSN)
Article - Conference proceedings
© 2001 Metal Powder Industries Federation, All rights reserved.
01 May 2001