What type of metallurgical failure does Item...

Question 1 / 2707066636eed28f7522a1c51e3f3

Question 1 of 2707066636eed28f7522a1c51e3f3

What type of metallurgical failure does Item B represent in the illustration? Illustration GT-0014

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Question 1 of 27070

What type of metallurgical failure does Item B represent in the illustration? Illustration GT-0014

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🔍 Key Concepts

• Axial vs circumferential vs radial – think about how each type of crack is oriented relative to the long axis and the "around" direction of the blade • Where a weld would normally be located on a turbine blade, and what weld cracking would look like • How radial cracks typically grow outward from a central point, like spokes on a wheel

💭 Think About

• Look carefully at the direction of the cracks at Item B: are they mostly running up-and-down, side-to-side around the blade, or from an inner point outward? • Ask yourself: if you wrapped a tape measure around the blade, which type of crack would tend to follow that wrap line? • Consider whether there is any visible weld in the area of Item B that could actually fail in the way shown

✅ Before You Answer

• Identify the long axis of the blade and compare it to the orientation of the cracks at B • Decide whether the cracks at B could encircle the blade if they continued, or whether they would run along its length instead • Confirm that there is no weld joint indicated at B, so one option can likely be ruled out

Question 1 of 27070

What type of metallurgical failure does Item B represent in the illustration? Illustration GT-0014

Weld cracking.

Axial cracking.

Circumferential cracking.

Radial cracking.