Cracking of Aluminum Alloy Rivets Used in Space Application: A Metallurgical Investigation |
| |
Authors: | Abhay K Jha K Sreekumar P P Sinha |
| |
Affiliation: | (1) Materials Characterisation Division, Vikram Sarabhai Space Centre, Indian Space Research Organisation, Trivandrum, 695 022, India;(2) Materials and Metallurgy Group, Vikram Sarabhai Space Centre, Indian Space Research Organisation, Trivandrum, 695 022, India;(3) Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Indian Space Research Organisation, Trivandrum, 695 022, India |
| |
Abstract: | Adaptors used in check valve inlet pressure sensors were fabricated from austenitic stainless steel. Recently, during pretest
operation and during hydrogen pressurization of an engine, a leak was noticed through the adaptor. Subsequent to disassembly,
the leak was attributed to a crack in the adaptor. Detailed metallurgical investigations were carried out to understand the
cause of cracking. Synergistic effect of chloride ions present in marine environment, the presence of residual stresses and
sensitized grains of the material led to intergranular stress corrosion cracking. This article highlights details of investigation. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|