52100 Ultra low hardening/aust temperature

Pretending I can correctly read nanographs, looking for insight why my sample blades suffered major loss of plasticity. This pin-hole (cropped) nanograph focuses on what could possibly be a grain boundary slippage among polycrystalline during martensite formation. In other words, a micro fracture/crack across a few grains... At least a week before I meet with the Scientist to discuss finding/interpretations.

Welcome to chime in with opinions. Beside the obvious - fuzzy image from state of the art BackScatter Electron Diffraction instrument:D
k3_bsed_100K_peek.png
 
It looks like my view out of the kitchen windows after the 6th snowstorm we had.
 
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