Cabrillo College

Cabrillo College

ENGR 45 – Engineering Materials

Summary: Metals

P 125 flow chart of metals with breakdowns

Be able to differentiate between plain carbon steel and alloy steels

P 127: know one advantage of adding each of the alloying elements to steel

P 129-131: know one advantage and one disadv of using the non-ferrous metals instead of steel

P 134: understand the fabrication operations

Hot working vs Cold working: plastic def at which temp (above or below recrystalization temp); what properties are produced and why

Given a metal and its melting point, determine if it is hot worked or cold worked at room temp

General understanding of annealing..the textbook has a great explanation

P 136: understand the terms

P 137 – 140: understand strengthening mechanisms, solid solution str., and unlimited or limited solubility

P 141-147: understand terminology on isomorphous and eutectic phase diagrams

P 148-150: Understand properties relationship to composition for both isomorphous and eutectic phase diagrams. Be able to sketch properties vs composition.

P 151-155: Be able to answer the following questions given the composition and temperature on isomorphous and eutectic phase diagrams

What phases (and microconstituents) are present; What’s the composition of each phase; What is the amount of each phase and each microconstituent (suggestion: review the phase diagram quiz

P 157 – 159: Steel phase diagrams: be able to answer the same phase diagram questions above for the Fe-C phase diagram

P 160: be able to understand what the figure is communicating

P 161-62: Understand the microstructures of steel including why M has high hardness

Heat Treatment: Know the first and fourth column on p 163

P 164-167: given the cooling reaction sketch on the TTT diagram, determine the microstructure(s) produced

(And be able to sketch the path given the microstructure)

P 173: Recognize the differences between the TTT diagrams of eutectoid steel vs hypo and hyper steel

P 168-69: be comfortable understanding the information provided in the diagrams

Know properties and why given on p 170 -172

Name and describe the two surface hardening techniques: carburing and nitriding