fusion lines and columnar grain boundaries. The RA
content in the FZs of TRIP steel welds is about 4 pct by
volume, whereas the base metal austenite content is
about 10 pct by volume.
While it is possible to say that high-Al TRIP steel is
poorer to weld because it forms coarse inclusions in the
FZ and a soft ferritic zone at the fusion lines compared
with the high-Si TRIP steel, which showed only the
formation of inclusions in the FZ, further experimental
evidence should be sought in terms of mechanical
behavior of the welds with varying aluminum and
silicon contents to optimize the TRIP steel chemistry for
better weldability.