|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||2016 Technical Division Student Poster Competition
||SPU-12 : Effect of Heat Treatment and Chemical Composition on the High Temperature Hydrogen Attack (HTHA) Resistance of C-1/2 Mo Steels
||Will Hoskins, Maneel Bharadwaj, Carl Lundin, Martin Prager
|On-Site Speaker (Planned)
Metallurgical examination and heat treatment studies were conducted on C-1/2 Mo steels to investigate the effect of heat treatments and chemical composition on high temperature hydrogen attack (HTHA) resistance. This study was undertaken to provide an optimum microstructural and heat treatment guideline for petrochemical applications. Unique box-like assemblies were fabricated from two C-1/2 Mo steels to simulate the one sided exposure conditions of typical pressure vessel components. These box-like assemblies were given either a normalizing or an annealing heat treatment followed by a tempering heat treatment. The box-like assemblies were exposed to a hydrogen pressure of 900 psi at 900°F for 1248 hours in specially designed furnace autoclaves. The post-hydrogen exposure microstructural and mechanical properties were characterized. The normalized and tempered heat treatment showed superior resistance to HTHA compared to the annealed and tempered heat treatment. C-1/2 Mo steels with an increased Mo/C ratio also exhibited superior resistance to HTHA.
||Definite: None Selected