|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||EAC Behavior of Modified Duplex Stainless Steel Bars in Seawater
||Kewei Gao, Haisheng Tong, Xiaolu Pang, Yanjing Su, Yanhui Sun
|On-Site Speaker (Planned)
Nowadays, duplex stainless steels (DSS) are used as a higher strength and toughness, corrosion-resistant alternative to austenitic steels in industry, so DSS reinforcing bars can be a means for extending the service life of reinforced concrete structures exposed to seawater.
In this investigation, a modified DSS was developed to manufacture reinforcing bars. The bars were divided into two groups: as-received, or solution treatment. A commercial 2205 DSS was included for comparison. The microstructures and mechanical properties of these steels were analyzed. The time-dependent change of pitting depth was measured and the residual strength of pitting-bearing bar was evaluated. The susceptibilities of the steels to SCC and HE were studied, respectively, in a simulated seawater and a saturated Ca(OH)2 solution with 3.5% NaCl simulating the concrete pore liquid. Results showed higher corrosion resistance and lower sensitivity to SCC and HE for the modified DSS bars compared to the commercial 2205 DSS.
||Planned: Supplemental Proceedings volume