hi friends, can somebody help me out
in steel, microstructural changes in the HAZ defines the extent of HAZ,
but in aluminium no such phase change take place, then how to figure
out the HAZ in aluminium weldments.
So if we were to investigate this ourselves, we could look down a
microscope at a polished and etched sample and look for grain growth
(larger grains) - or we could do a micro-hardness traverse looking for
hardness change on change in precipitates?
Thanks for your answer
i guess precipitation of unwanted alloy could change the hardness in
the HAZ and give solution to our problem. but grain growth may not be
a possibilty i guess. i will check it out by carrying out a Al welding.