|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||Analysis of the Aging Behavior and Orientation Relationships with Respect to β-Mn Phase in Austenite-based Low-density Steel
||Keunho Lee, Seong-Jun Park, Jun-Yun Kang, Siwook Park, Anthony D. Rollett, Sukbin Lee, Kyu Hwan Oh, Heung Nam Han
|On-Site Speaker (Planned)
Recently, many researches in steel industry have been focused on reducing the density of steel while maintaining high strength for automotive applications, leading to development of various low-density steels. Among them, austenite-based low-density steels based on the Fe-Al-Mn-C system show superior mechanical properties and weight reduction rates. After aging steps, micro/nano-scale precipitates are formed in such steel system. Especially among them, β-Mn phase causes harmful effect on mechanical properties, inducing brittle fracture. However, there is still a paucity of research on precipitation characteristics of the β-Mn. In this study, the aging behavior and orientation relationships in high Mn low-density steel are investigated. The microstructure evolutions and mechanical response during aging treatment are characterized by Vickers hardness measurement combined with microstructural observations. The misorientation-angle distribution, Rodrigues–Frank vector space, and orientation relationship stereogram (ORS) from EBSD measurements are applied for analyzing the orientation relationships for austenite/β-Mn and β-Mn/D03 interphase boundaries, respectively.
||Planned: Supplemental Proceedings volume