Chapter 3 Flashcards Preview

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Flashcards in Chapter 3 Deck (10):
1

Name the six tensile test sequences

No load
Uniform Elongation and area reduction
Maximum load
Necking
Fracture
Putting pieces back together to measure final length

2

Engineering strain

Length - Orig Length / Orig Length

3

What is the slope function for modulus of elasticity

Axial Stress = E*strain

4

Strain Hardening

Metal becomes stronger as strain increases

5

Relationship between true stress and true strain

Stress = (strength coefficient*e^(strain hardening coefficient)

6

What test is used to measure metals and nonmetals with low to medium hardness

Brinell Hardness Test.

Where take a ball and press it into material at 500, 1500 or 3000 kg

7

Explain the Di, Db, and F in the brinell hardness formula.

Inner and ball diameter. Indentation load.
2F/(pi*Db(Db-sqrt(Db^2 - Di^2)))

8

Explain Rockwell Hardness Test

Cone shaped indentor pressed into material at 10 kg then 150 kg. Distance covered is calculated by machine.

9

Explain temperature effect on strength and ductility

Strength decreases.
Ductility increases.

10

Range hardness of Low C, High C, high alloy and Ceramics

Ceramics are the hardest. Then it is high alloy steel, high C and low C.