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I'm FAR from expert and won't comment on the grain, but something Doug touched on, differential hardening. I would expect the blade to bend about 45? and break like that AFTER tempering. I would expect a quenched but not tempered blade to break before reaching any 45? bend and I would not expect the blade to stay bent as the one in the photo, that is again, unless it was tempered.
It looks to me like perhaps it didn't fully harden and that is probably because of the "cold" canola oil. As others have said, warmed canola actually cools faster than room temp oil. I quench with canola @ 120?.
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