7.2. Hardness Test

Try these first

1. 1.

   What is the primary purpose of hardness testing?

   Hint

   Think about why engineers need to know how hard a material is.

2. 2.

   Name one method of hardness testing.

   Hint

   Consider the tests we've discussed today.

3. 3.

   What does the Brinell hardness test measure?

   • Resistance to heat
   • Resistance to indentation
   • Resistance to corrosion

   Hint

   Think about what happens when a hard object presses into a softer material.

4. 4.

   True or False: The Vickers hardness test uses a steel ball.

   • True
   • False

   Hint

   Consider what it means to use a diamond for hardness testing.

5. 5.

   You have samples of aluminum and steel. Which hardness test would you choose for each and why? Provide calculations for expected hardness values.

   Hint

   Reflect on the material properties that dictate your choice.

6. 6.

   Design a testing plan for a new metal alloy. Include methods, expected hardness values, and implications for material selection in construction.

   Hint

   Consider the requirements for the construction applications of the alloy.