DEVELOPMENT OF HIGH-STRENGTH COLUMBIUM AND TANTALUM ALLOY TUBING. Quarterly Progress Report No. 3, June 1, 1963-August 31, 1963
The feasibility of drawing B-66 to tubing was demonstrated. A solid B- 66 rod was gun-drilled and then reduced by drawing, 80%, to 0.5 inch OD x 0.062 inch wall tubing at 600 deg F. An attempt to draw B-66 to tubing at room temperature was unsuccessful because of a lubrication failure. This resulted in excessive galling between the die and tube OD from which a crack was initiated. Tube drawing is being done at the facilities of the Superior Tube Company. Extrusion of 69 pounds of B-66 and 142 pounds of T-111 tube blanks at a reduction ratio of 7: 1 was accomplished at the facilities of Nuclear Metals, Inc. The extrusion constant for the B-66 was 80 to 81.7 ksi and 76 to 85.5 ksi for the T- 111. The results of the tube blank extrusions verified the data from the previous extrudability evaluation. The B-66 extrusions were conditioned and yielded 43.75 pounds of tube blanks, a 63% recovery of useable material based on the starting extrusion billet weight. The as-conditioned B-66 tube blanks were successfully warm tube reduced 55% from a 2 inch OD x 0.25 inch wall to a 1.375 inch OD x 0.156 inch wall. (auth)
- Research Organization:
- Westinghouse Electric Corp. Astronuclear Lab., Pittsburgh
- NSA Number:
- NSA-18-002205
- OSTI ID:
- 4150439
- Report Number(s):
- WANL-PR-(N)-003
- Country of Publication:
- United States
- Language:
- English
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