Bolts are an important connecting part and their damage often has unpredictable consequences for the equipment or structure. The following is a copy of the bolt damage analysis.
This section mainly introduces analytical methods.
Typical transgranular and intergranular fractures indicate a higher strength of this material.
The energy spectrum can be used to analyze the corrosion product composition on the fracture.
Non-destructive testing determines the location and orientation of the crack.
Typical fatigue fracture morphology.
Liquid metal embrittlement cracks, this crack is still less common, its characteristics are also obvious, there is a sense of filling in the crack.
Flange connection bolt break
Even if the fracture surface is covered with corrosion products, the fatigue fracture characteristics can be observed by careful observation.
The second case is the bolt break in the seawater environment, which needs to consider the corrosion of the marine environment.
The crack has a bifurcation feature, and the durability is along the crystal crack?
The fracture property is hydrogen induced cracking, and the type is cracking along the crystal.
This is also a typical fatigue fracture type failure.
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