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Failed Pop Rivet

A pop rivet failed while being used to hold two structural members together. A series of views of the failed pop rivet are shown below.

Overall view of failed pop rivet.
Photograph A Head of failed pop rivet. 
Close-up view of failed pop rivet.
Photograph B Close-up view of failed pop rivet. 

The failed pop rivet exhibited a typical cup and cone fracture appearance. This indicated that the pop rivet failed in tension.

Close-up view of cup and cone fracture on a pop rivet.
Photograph C Overall view of failed pop rivet shank. 

In the close-up view of the failed pop rivet, note the distinct cup and cone fracture at magnification 30x.  Close-up views of the cup and cone fracture indicating tensile overload, are shown in photographs below.

Close-up view of cup and cone fracture.
Photograph D  Close-up view of cup and cone fracture (mag 30x).
Close-up view of bottom of cup fracture.
Photograph E  Close-up view of bottom of cup fracture (mag 40x).
The center fracture area failed in tension as can be seen by the cup and cone fracture in Photograph E (mag 40x).

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J.E.I. Metallurgical, Inc.

5514 Harbor Town
Dallas, Texas 75287

Phone: (972) 934-0493
Fax: (469) 737-3938
Email: r.c.jerner@metallurgist.com

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