|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Stress-corrosion Cracking in Ti-8Al-1Mo-1V
||Sheng Cao, Chao Voon Samuel Lim, Su-Ming Zhu, Xinhua Wu
|On-Site Speaker (Planned)
In SCC of Ti-8Al-1Mo-1V, there was a fracture mode transition from ductile dimples during pre-crack to flat facets during SCC. In order to understand the SCC mechanisms, T-EBSD and TEM analysis were applied on FIB lift-out lamellas cut from pre-cracking and SCC fractured regions to investigate the difference in the dislocation substructure underneath the fracture surface. It has been found that: • In pre-cracking region, basal α slip was the dominate slip system. While, basal α and c+a slip were observed underneath SCC facets. • An increase in dislocation density was observed underneath SCC facets compared to that below the pre-crack dimples. • A combined AIDE and HELP could be the SCC mechanism.
||Planned: Supplemental Proceedings volume