|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||High Performance Steels
||Semi in-situ observation of micro-crack formation in dual-phase steels
||Hung-Wei Yen, Ming-Yu Tseng, Yi-Fan Hu, Kuo-Cheng Yang, Kangying Zhu
|On-Site Speaker (Planned)
This work presents a prototype of semi in-situ tensile apparatus (SISTA), which enables semi in-situ observation on materials deformation under scanning electron microscope. SISTA is applied to study micro-crack formation in DP780 and DP980 dual-phase steels in tension by using electron backscattering diffraction and electron channeling contrast image. The results show that DP980 steel tends to form micro-cracks from ferrite grain surrounded by martensite. In contrast, DP780 steel tends to form micro-cracks at the vicinity of martensite/ferrite interface. The related mechanisms of micro-cracking are discussed in the view of deformation behaviors in two DP steels. This study provides insights into materials failure in forming and materials design of DP steel.
||Iron and Steel, Mechanical Properties, Characterization