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Case Study Threaded Bolt

Macroscopic view of the threaded bolt

Fractured surface of a threaded bolt M42 (macroscopic view).

Microscopic view of the structure

Microscopic illustration of the structure

40µm
40µm

 
Scanning electron micrograph view

Scanning electron fractography with indication of hydrogen embrittlement. There are ball-like structures in the recesses.

50µm
50µm

 
Energy dispersive X-ray analysis

Energy dispersive X-ray analysis in the range of the planning level. The ball-like particles are metal powder; the vermicular particles are steel swarf.

50µm
50µm

 
Energy dispersive X-ray analysis

Energy dispersive X-ray analysis of bright particles at the planning level.