|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Environment Induced Degradation in Maraging Steel Grade 18Ni1750
||Ramkumar Devendranath, Gopi G, Trilochana Jena, Ravi Prasad Valluri, Nageswara Rao Muktinutalapati
|On-Site Speaker (Planned)
Tensile testing of maraging steel grade 18Ni1750 was carried out at ambient temperature in laboratory air environment. Two different strain rates were used, the cross head speed corresponding to 5 mm / min (normal strain rate) and 0.015 mm / min (slow strain rate). The steel used in the study was in the form of 3 mm thick cold rolled flat, the amount of cold work being 60 %. The material was directly aged in three different ways before tensile testing – 3.5 h at 480C, 6 h at 480C and 6 h at 540C. For all the three treatments, testing at the lower strain rate resulted in a distinctly lower value of percent elongation. This is believed to be a result of environmentally induced degradation of the steel. It is concluded that cold working is responsible for the susceptibility to environmental degradation observed in the material studied here.
||Planned: Supplemental Proceedings volume