| TABLE OF CONTENTS |
|---|
| 1. | Abstract | 1 |
| 2. | Background | 1-2 |
| 3. | Introduction | 2-4 |
| 3.1 | Density | 2 |
| 3.2 | Composition and Microstructure | 2-3 |
| 3.3 | Material Design | 3-4 |
| 3.4 | Overall Alloying Effects Study | 4 |
| 4. | Experimental Procedure | 4-7 |
| 4.1 | Effect of Copper and Graphite Additions | 4-5 |
| 4.2 | Premix Refinement | 6 |
| 4.3 | Impact/Temper Study | 6 |
| 4.4 | ANCORDENSE Processing | 6 |
| 4.5 | Metallography | 7 |
| 5. | Results and Discussion | |
| 5.1 | Effect of Copper and Graphite Additions | 7-9 |
| 5.2 | Premix Refinement | 9-10 |
| 5.3 | Impact/Temper Study | 10-12 |
| 5.4 | ANCORDENSE Processing | 13 |
| 5.5 | Metallography | 13-17 |
| 6. | Conclusions | 18 |
| 7. | Acknowledgements | 19 |
| 8. | References | 19 |
| 9. | Tables | 4-14 |
| 9.1 | Qualitative Ranking of Alloying Elements in Prealloyed Materials | 4 |
| 9.2 | Premix Compositions for Part I | 5 |
| 9.3 | Premix Compositions for Part II | 6 |
| 9.4 | ANCORDENSE Premix Compositions | 6 |
| 9.5 | Ancorsteel 737 SH Premix Compositions with Varied Copper and Graphite Additions | 8 |
| 9.6 | Comparison of the Green and Sintered Properties of Premixes | 9 |
| 9.7 | Mechanical Properties of Select Ancorsteel 737 SH Premixes | 10 |
| 9.8 | Apparent Hardness and Impact Energy at Various Tempering Temperatures | |
| for Select Ancorsteel 737 SH Premixes | 11 | |
| 9.9 | ANCORDENSE Properties of Ancorsteel 737 SH Premixes | 14 |
| 10 | Figures | 9-18 |
| 10.1 | Transverse Rupture Strength as Function of Sintered Carbon Content for | |
| Specimens Compacted at 40 tsi | 9 | |
| 10.2 | The Effect of Tempering Temperature on Apparent Hardness | 12 |
| 10.3 | The Effect of Tempering Temperature on Impact Energy | 12 |
| 10.4 | Microstructure of a Sample Produced from Premix #1-1 (0.5 w/o Graphite). | |
| Etched with 1% Nital/4% Picral | 15 | |
| 10.5 | Microstructure of a Sample Produced from Premix #1-5 (1 w/o Copper - 0.7 w/o | |
| Graphite). Etched with 1% Nital/4% Picral | 15 | |
| 10.6 | Microstructure of a Sample Produced from Premix #1-9 (2 w/o Copper - 0.9 w/o | |
| Graphite). Etched with 1% Nital/4% Picral | 16 | |
| 10.7 | Microstructure of Premix #2-1 (0.8 w/o Graphite). Original Magnification 500X. | |
| No Retained Austenite Present | 16 | |
| 10.8 | Microstructure of Premix #2-2 (1 w/o Copper - 0.7 w/o Graphite). Original | |
| Magnification 500X | 17 | |
| 10.9 | Microstructure of Premix #2-3 (1.5 w/o Copper - 0.8 w/o Graphite). Original | |
| Magnification 500X | 17 | |
| 10.10 | Microstructure of Premix #2-4 (2.0 w/o Copper - 0.9 w/o Graphite). Original | |
| Magnification 500X | 18 | |
