SYMPOSIA PAPER Published: 01 January 1990
STP39199S

Stress Corrosion Cracking in Alloy 400 (UNS NO4400) at Room Temperature

Source

Selective pitting studies were used to determine environments likely to cause stress corrosion cracking (SCC) in Alloy 400. Slow strain rate tests were performed on waisted specimens, with solution composition and concentration, strain rate, grain size, and prior cold work as variables. It was found that environments which caused pitting also caused SCC; examples include ammonium hydroxide, ammonium persulfate, and hydrofluoric acid in the presence of an oxidizer.

As in the case of both hydrogen and liquid metal embrittlement of Alloy 400 and other nickel-base alloys, the SCC at low strain levels was intergranular with a transition to transgranular at higher strains. The fractography of the SCC resembled that of the other embrittling environments.

Author Information

Everhart, LG
The Johns Hopkins University, Applied Physics Laboratory, Baltimore, MD
Price, CE
School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: G01
Pages: 319–334
DOI: 10.1520/STP39199S
ISBN-EB: 978-0-8031-5559-6
ISBN-13: 978-0-8031-1406-7