|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||P1: A Design Strategy for Developing Lightweight TWIP High Entropy Alloy
||Min Seok Kim, Kook Noh Yoon, Hyun Seok Oh, Eun Soo Park
|On-Site Speaker (Planned)
||Min Seok Kim
Combination of high strength and ductility is a long standing issue for structural materials. Furthermore, weight reduction has recently become an urgent issue as environmental problems become more severe. In the present study, we tried to develop an unique lightweight high entropy alloys (HEAs) with twin-induced plasticity (TWIP) behavior. It is well known that deformation mechanism of material can be systematically changed from slip to twin as stacking fault energy (SFE) decreases. Thus, we first designed dual phase HEA using the CALPHAD approach to lower the SFE down to dual phase region. And then we added aluminum, which is known for SFE elevating and light-weight element. As a result, we could achieve good mechanical properties and light weight in the newly developed HEA by controlling SFE in the TWIP region. This result can be applicable to various 3d transition metal based alloys that require good mechanical properties and weight lightening.