Accession Number:

AD0411116

Title:

RESEARCH ON CHROMIUM-BASE ALLOYS EXHIBITING HIGH TEMPERATURE STRENGTH, LOW-TEMPERATURE DUCTILITY, AND OXIDATION RESISTANCE.

Descriptive Note:

Final rept., 15 Mar 62,15 Mar 63,

Corporate Author:

GENERAL ELECTRIC CO CINCINNATI OH

Personal Author(s):

Report Date:

1963-06-01

Pagination or Media Count:

73.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE