Destructive Testing and Properties Flashcards

In a Charpy V-notch impact test, what does the absorbed energy value primarily indicate?

Answer: Toughness or notch ductility of the material

The Charpy V-notch test measures the energy absorbed during fracture, which is a direct measure of toughness or notch ductility.

Which destructive test is specifically designed to evaluate the ductility of a weld and its surrounding base metal by bending the specimen?

Answer: Guided bend test

The guided bend test uses a jig to bend specimens to a specified angle to evaluate weld ductility and soundness.

A face bend specimen is bent so that the:

Answer: Face of the weld is in tension

In a face bend test, the weld face is placed on the outer (tension) side of the bend.

During a nick-break test, what feature is deliberately introduced to initiate fracture?

Answer: Notches sawed into the weld edges

Saw-cut notches are made along both edges of the weld bead to ensure fracture occurs through the weld metal.

What does a macro-etch test reveal that a visual inspection cannot?

Answer: Internal weld discontinuities and fusion quality

Macro-etch testing uses acid to reveal internal weld cross-section features including fusion, penetration, and subsurface discontinuities.

The Vickers hardness test uses which type of indenter?

Answer: Diamond pyramid

The Vickers test uses a square-based diamond pyramid indenter and measures the diagonal of the resulting impression.

In a transverse tensile test of a weld, where must fracture occur for the test to be considered acceptable per most codes?

Answer: Anywhere, as long as UTS meets minimum requirements

Most codes accept transverse tensile fracture anywhere in the specimen as long as the ultimate tensile strength meets the specified minimum.