Knowledge check (7 of 7)
100%
Lesson 11·Failure modes
The big four failure modes and how the build prevents them
Thermal fatigue, mechanical fatigue, plastic deformation, and abrasive or adhesive wear: how each shows up on a pulled die, what mechanism drives it, and which build decisions push the failure point out or shift the mode.
11 min readLesson 11 of 13
Knowledge check
A press shop pulls a closed-die forge insert at 32,000 cycles with a single through-thickness crack running from the base of an internal rib to the back of the block. There is no heat-check craze on the working surface, no measurable cavity wash, and the flash land is intact. Map the failure to one of the four modes and name the build decision that would have moved the failure point.