`Crane rail forging burst failure`

Holman's consulting case. Crane rail on a dredging barge turntable fractured; sectioning revealed an internal forging burst from refractory inclusion during manufacture. Should have been caught by pre-service ultrasonic inspection. Holman passes the sectioned sample around the class.

[Holman passes a section of rail around the class.] The example I'm going to pass out is not from a commuter rail, so I don't want you to think somebody was driving on this. This was from a crane rail. It was out on a barge — it was a turntable, and a crane moved over it and did dredging operations. I got a call one day and they said, we need you to come out here, we can't run the crane, the rail broke. So we flame-cut the section of rail out that I needed, and when I came back to my lab and cut a clean section through it, I saw this.