References cited in this section

27. E.P. Papadakis and B.W. Petersen, Ultrasonic Velocity as a Predictor of Density in Sintered Powder Metal Parts, Mater. Eval., April 1979, p 76

28. B. Patterson, C. Bates, and W. Knopp, Nondestructive Evaluation of P/M Materials, Prog. Powder Metall., Vol 37, 1981, p 67

29. R.H. Brockelman, Dynamic Elastic Determination of the Properties of Sintered Powder Metals, Perspect. Powder Metall., Vol 5, 1970, p 201

30. E.R. Leheup and J.R. Moon, Yield and Fracture Phenomena in Powder Forged Fe- 0.2C and Their Prediction by NDT Methods, Powder Metall., Vol 23 (No. 4), 1980, p 177

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