RESEARCH ON CHROMIUM-BASE ALLOYS EXHIBITING HIGH TEMPERATURE STRENGTH, LOW-TEMPERATURE DUCTILITY, AND OXIDATION RESISTANCE.
Abstract
Improvements in ductility, strength, and oxida tion resistance of chromium were obtained by combinations of small amounts of rhenium and reactial additions (yttrium, thorium, and hafnium). Dispersions, formed by reactions be tween impurities and reactive metal additions or by the addition of dispersoid-forming elements, resulted in increased ductility and strength. Combinations of reactive metal additions were more effective in improving ductility and oxida tion resistance than single additions. Possible mechanisms are outlined. Two alloys exhibited resistance to nitrification for 100 hours at 2500 F in thick sections. These were a Cr - 10 wt-% Re Y, Th, and Hf alloy and a Cr - 15 volume percent Y2O3 - 1 wt-% Y cermet. Thin sections exhibited less resistance to nitrification. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1963
- Accession Number
- AD0411116
Entities
People
- Carl S. Wukusick
Organizations
- General Electric