POS VETT Posted June 12, 2018 Report Share Posted June 12, 2018 The c6z axle I broke looks like pot metal on the inside. Far from potmetal, it's a typical appearance of brittle fracture of a carbon steel. The failure was initiated by fatigue cracking mechanism (the narrow, shinier, smoother band on the top outer, roughly from 9:00 to 3:00-4:00 clock position). Like most fatigue failures, there is an origin. However, without a microscopic-level investigation I wouldn't put down my money yet, but look at around 11:00 position. There is a dark sliver on the fracture surface which might indicate the origin. It might be a near-microscopic crack. So, the crack grew with each iteration of torque application through fatigue. The crack became longer and deeper and at one point, it let go at once. If I'm not mistaken, there is a sign of ductile fracture around the "peak" and probably extended all the way to 9:00 judging from the chevrons pointing to the peak. The inner portion is all brittle judging from the rough and jagged appearance. Half of you are probably snoring by now ... Quote Link to comment Share on other sites More sharing options...
Not Brian Posted June 12, 2018 Report Share Posted June 12, 2018 11.2 @ 104.. that's a helluva launch Quote Link to comment Share on other sites More sharing options...
gillbot Posted June 12, 2018 Report Share Posted June 12, 2018 Far from potmetal, it's a typical appearance of brittle fracture of a carbon steel. The failure was initiated by fatigue cracking mechanism (the narrow, shinier, smoother band on the top outer, roughly from 9:00 to 3:00-4:00 clock position). Like most fatigue failures, there is an origin. However, without a microscopic-level investigation I wouldn't put down my money yet, but look at around 11:00 position. There is a dark sliver on the fracture surface which might indicate the origin. It might be a near-microscopic crack. So, the crack grew with each iteration of torque application through fatigue. The crack became longer and deeper and at one point, it let go at once. If I'm not mistaken, there is a sign of ductile fracture around the "peak" and probably extended all the way to 9:00 judging from the chevrons pointing to the peak. The inner portion is all brittle judging from the rough and jagged appearance. Half of you are probably snoring by now ... Run an FEA on it yet? Quote Link to comment Share on other sites More sharing options...
POS VETT Posted June 12, 2018 Report Share Posted June 12, 2018 Run an FEA on it yet? Not an FEA geek ... Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted June 13, 2018 Report Share Posted June 13, 2018 My man! I'll shoot you a PM Looks like you will have to go to the track more than once. Haha. Quote Link to comment Share on other sites More sharing options...
coltboostin Posted June 13, 2018 Author Report Share Posted June 13, 2018 Half of you are probably snoring by now ... I like it. Makes sense. I also think the new one "looks" better to me. We will see what happens! Looks like you will have to go to the track more than once. Haha. Ha! They would be good to have on the street . 2nd gear is currently useless from a roll. Quote Link to comment Share on other sites More sharing options...
coltboostin Posted August 15, 2018 Author Report Share Posted August 15, 2018 Had a run in with a Twin Turbo Challenger. Fully built- 800whp on Big 3s dyno. Races where close if I let him get fully into boost, but otherwise, dem' c6z bald eagles were screamin'. As always I am all motor. https://www.youtube.com/watch?v=z85rmNdJdVw&feature=youtu.be Iphone-FB-Youtube kills the quality All thanks to Erik at Backstreet performance for the killer tune up! http://backstreetper.com/ Quote Link to comment Share on other sites More sharing options...
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