|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P1-96: Modeling of Phase Transformation Kinetics in Post Heat-treated Resistance Spot Welds of AISI 1010 Mild Steel
||Feujofack Kemda Bleriot Vincent, Noureddine Barka, Mohammad Jahazi, Denis Osmani
|On-Site Speaker (Planned)
||Feujofack Kemda Bleriot Vincent
The usage of transformation induced plasticity (TRIP) steels and boron steels in some auto body parts have become a necessity because of their lightweight. However, in resistance spot welding (RSW), the resulting weld nugget is generally fully martensitic, especially in the case of TRIP and boron steels but also for plain carbon steels as AISI 1010 which is extensively used in auto body inner parts. Martensite is the principal source of brittleness in weld nugget and must be avoided as much as possible. Thus, this work aims in finding means to reduce martensite fraction in weld nugget. Prediction of phase transformation was done through a modeling of the whole welding process and post weld heat treatment (PWHT) have been applied in order to reduce martensite fraction in the weld. Simulation results show that application of PWHT leads to a reduction in martensite and an increase in ferrite and bainite fractions in the weld nugget.