| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Advances in Metallic Coated Advanced Steels
|
| Presentation Title |
Liquid Metal Embrittlement in TRIP and Martensitic Ultrahigh Strength Steels |
| Author(s) |
Pallavi Pant, Emmitt F. Fagerstrom, Benjamin Hilpert, Holger Schubert, Luke N. Brewer |
| On-Site Speaker (Planned) |
Pallavi Pant |
| Abstract Scope |
This presentation will describe recent results on the liquid metal embrittlement (LME) of transformation-induced plasticity (TRIP) and martensitic (MS) ultrahigh strength steels. These steels are zinc coated for corrosion protection, but during welding, they can experience LME. LME of TBF1180 and MS1500 steels was studied by hot ductility testing using a Gleeble thermo-mechanical simulator. In addition, resistance spot welding of the same steels is being conducted using standard welding cycles. Current results show that the LME sensitivity is temperature-dependent over a limited range of temperatures, from 800-850˚C. Detailed, SEM-based fractography shows that the LME is intergranular in nature. While an LME response from hot ductility testing has been observed to some extent in all of the steels studied, LME is not so far present for all steels during RSW. Further investigation of the thermal cycle and stresses during RSW is being explored using the finite element method (FEM) code SORPAS. |