About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design Approaches and Experiences V
|
Presentation Title |
Microstructure and Cracking Susceptibility of Continuously Cast Slabs of 3rd Generation Advanced High Strength Steels |
Author(s) |
Rafael Coura Giacomin, Bryan Webler |
On-Site Speaker (Planned) |
Bryan Webler |
Abstract Scope |
The 3rd generation of Advanced High-Strength Steels (AHSS) is being developed to obtain good combinations of strength and ductility for automotive applications. These grades contain higher levels of manganese, silicon, and/or aluminum than many other steels. Although they exhibit excellent strength and ductility after appropriate processing, they are challenging to produce using existing steel production methods. One of the major challenges has been cracking of continuously cast slabs. This work examined microstructure-property relations in as-cast steels to identify the reasons for this cracking. Failed production slabs were examined and several laboratory heats were produced to vary chemical composition. Laboratory heat compositions were 0.2wt.%C, 2.5-3.0wt.%Mn and 0.5-3.0wt.%Si. Charpy V-Notch tests were used as a measure of toughness for all samples. Grades with higher silicon exhibited the lowest toughness due to a network of thin allotriomorphic ferrite at prior austenite grain boundaries. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |