Accession Number:
AD0752930
Title:
The Solutioning and Aging Reactions and their Effect on Hardness and Microstructure in some Columbium Base Alloys.
Descriptive Note:
Technical rept.,
Corporate Author:
CINCINNATI UNIV OHIO DEPT OF MATERIALS SCIENCE AND METALLURGICAL ENGINEERING
Personal Author(s):
Report Date:
1972-09-01
Pagination or Media Count:
142.0
Abstract:
A study was made to investigate the solutioning and aging reactions and their effects on microstructure and hardness in twenty-four experimental columbium-base alloys, involving Cb-C, Cb-Si-C, Cb-15Hf-C, Cb-15Hf-C-Si, Cb-33Hf-C and Cb-33Hf-C-Si systems. The aging reactions in the Cb-15Hf-C, Cb-15Hf-C-Si, and Cb-33Hf-C-Si alloys are characterized by precipitation of the complex monocarbide Cb, Hf C, O, N phase. Replacement of some of the carbon by silicon in the Cb-15Hf-1C alloys raises the overaging temperature from 800 C to 1000 C and leads to strength retention for longer times than the alloys which contain carbon only. Author
Descriptors:
Subject Categories:
- Properties of Metals and Alloys