|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||J-3: Effects of Post-Weld Heat Treatment(PWHT) Time on Pitting Behavior in Modified 9Cr-1Mo Steel Welds
||Byungrok Moon, Sungyong Ahn, Namhyun Kang, Ikmin Park, Kwangho Kim, Kyungmox Cho
|On-Site Speaker (Planned)
9Cr-1Mo steel is widely used as a structural material of current power plants due to excellent oxidation resistance and creep property. Welding is an inevitable process in order to fabricate structural materials in power generation industries. Due to chemical composition and welding characteristics, there exists a delta-ferrite in the weld metal with rapid cooling from liquidus temperature. The pitting corrosion is observed in the martensite lath of weld metal after welding. However, with increase of PWHT time, pitting was also found at delta-ferrite/tempered martensite (δ/TM) interface. This paper presents the effects of PWHT time on pitting behavior in Mod. 9Cr-1Mo steel welds.
||Planned: Supplemental Proceedings volume