The residual stress of the additive manufactured aluminum alloy was measured using neutron diffraction (refer to the picture below for the sample shape).
The residual stress result measured by neutron diffraction method is shown in the figure below.
According to the results of several papers, LD and TD values show similar results, and ND values show different results.
However, my experimental results showed that the LD and ND results were similar, but the TD results were different.
These results do not explain well, please suggest any possibility.
hello,
as you pointed out in most of the case ND (in building direction )has different valuse than in LD and TD. Some more contexct will be reqiuired to explain this: was the sample still attached to the base plate or not and if it has been subjected to any heat treatment as well. Also first thing to check will be if the measured direction and direction presented are same ( some times this might happen ). Also try to get the stress balanced if you have done cross-sectional measurements.
Texture might be another aspect to be considerd here. AM compontes are highly influnce by the processing parameters as well.
hope this helps
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