he impact energy to fracture materials can can sometimes decrease dramatically w

Question

he impact energy to fracture materials can can sometimes decrease dramatically when the test temperature is decreased below a critical value, called the ductile-to-brittle transition temperature.

For what classes of materials is this especially true? Choose all that apply.
Question options:
-low strength polymers such as polyethylene (milk container material)
-high strength metals such as precipitation strengthened Al alloys
-low strength FCC metals such as pure Cu and Ni that have not been cold worked
-strength BCC metals such as iron

Explanation / Answer

-high strength metals such as precipitation strengthened Al alloys

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