Materials Engineering , Lab report

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One page report , see the file attached ,

Lab #1 Report Guidelines – Hardness Testing

Introduction:

  • Concise explanation what hardness is?
  • Why is hardness important?
  • Include the purpose of the experiment and its objectives.

Theory:

  • Define Hardness
  • Explain how a Rockwell Hardness Machine produces a hardness number.
  • Explain the difference between Micro and Macro hardness
  • What is the difference between Rockwell and Brinell hardness
  • Talk about the Rockwell scales
  • What are some of the precautions to get good hardness numbers
  • List equations used (percent error).

Results:

  1. Produce a table of the empirical data of known sample hardness with the average hardness and percent error.
  2. Produce a table of the empirical data of unknown sample hardness and average.

Analysis:

  1. Discuss what was learned from the known sample hardness data; i.e. what were the hardness average, standard value, and percent error?Was the error high than expected number? If so, why?
  2. Discuss what was learned from the unknown sample hardness data; i.e. what was the hardness average value?Select ten candidates for the unknown sample from www.matweb.com.Arrange them in a table with their hardness numbers. Explain why they could be the unknown material. State which candidate you believe the sample to be, and justify your reasoning. By the way, only the justification will be graded.

Requirements:

  • Follow the format guidelines given in the manual.

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