|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Factors Causing Hydrogen Embrittlement of Cold-drawn Pearlitic Steel Fractured under Elastic/Plastic Region
||Ryosuke Konno, Toshiyuki Manabe, Naoki Matsui, Daisuke Hirakami, Kenichi Takai
|On-Site Speaker (Planned)
Factors causing hydrogen embrittlement of cold-drawn pearlitic steel fractured under plastic/elastic region have been investigated from the viewpoint of lattice defects. Tensile tests were conducted for hydrogen-charged specimens containing 1.5 ppm and 4.0 ppm hydrogen to evaluate mechanical properties. The amount of tracer hydrogen, i.e., lattice defects in the specimens unloaded just before tensile fracture strength was measured using a thermal desorption analysis. As a result, specimens containing 1.5 ppm and 4.0 ppm hydrogen fractured under plastic and elastic region, respectively. The specimen fractured under plastic region enhanced the formation of lattice defects corresponding to vacancies, which caused embrittlement directly. In contrast, the specimen fractured under elastic region enhanced no formation of lattice defects. These results revealed that one of the factors causing hydrogen embrittlement under plastic region is due to hydrogen-enhanced strain-induced vacancies, whereas the factors causing hydrogen embrittlement under elastic region are due to others.
||Planned: Supplemental Proceedings volume