GROWTH OF SINGLE CRYSTAL TUNGSTEN TO BE USED FOR ROLLING INTO SINGLE CRYSTAL SHEET
Quarterly progress rept. no. 2, 1 Jun-31 Aug 1964
UNION CARBIDE CORP INDIANAPOLIS IN LINDE DIV
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Twenty-four tungsten crystals were grown by the ArcVerneuil method from which 7 were selected for machining into rectangular billets on the basis of minimum crystal misorientation and deviation of crystal orientation from cylindrical axis. Chemical analysis of the finished billets for interstitial and metallic impurities showed satisfactory low levels. The slip systems activated during the deformation of tungsten single crystals by rolling at 10 per pass and 1000C were investigated by means of A macroscopic dimensional changes of the billets, B Laue back-reflection photographs, C Vickers hardness measurements, and D dislocation etch-pit techniques.
- Fabrication Metallurgy