Effect of Variations in Silicon and Iron Content on Embrittlement of a Cobalt-Base Alloy (L-605)
Abstract
An investigation was conducted to study the effect of variations in silicon and iron content in L-605 (HS-25) on room-temperature ductility and other mechanical properties after aging at 1800 deg F for various times up to 1000 hours. The silicon content of the alloy was investigated over a range from 0.12 to 1.00 percent, and the content over a range from 0.16 to 3.24 percent. These ranges are generally within the manufacturer's specified nominal composition limits for these elements. This investigation shows that for low silicon content heats (0.12 to 0.23 percent) the room-temperature ductility of L-605 sheet aged for 1000 hours at 1600 deg F was improved over that of the high silicon content heats (0.49 to 1.00 percent), as measured by tensile elongations. The former heats had elongations of 13 to 16 percent, the latter had elongations of 2 to 6 percent. Little apparent effect on room-temperature ductility after aging was observed as a result of the variation of iron content from 0.16 to 3.24 percent.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1965
- Accession Number
- ADA396838
Entities
People
- Gary D. Sandrock
- John C. Freche
- Richard L. Ashbrook
Organizations
- National Aeronautics and Space Administration