8/15/2019 Lab Sheet 2 - Microstructure Study of Ferrous and Non Ferrous - Student

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Applied Mechanics Lab  – MEC 424/AHA/MCM Rev. 01-2014

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UNIVERSITI TEKNOLOGI MARAFAKULTI KEJURUTERAAN MEKANIKAL

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Program : Bachelor of Engineering (Hons) Mechanical (EM220/EM221)Course : Applied Mechanics LabCode : MEC 424Lab : Material Science

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Lab Sheet No : 2

Title : Microstructure Study Of Ferrous And Non Ferrous AlloysUnder Various Compositions And Heat Treatment

Conditions

1.0 Introduction

The mechanical properties of metals can be changed by its composition and heat treatment. Heattreatment is the process of heating and cooling, individually or combination of both. Engineeringmetals are commonly categorized into two main groups; ferrous and non ferrous. By varying the

compositions and heat treatment, different combinations of mechanical properties for ferrous and nonferrous can be obtained that modifies microstructures, producing a variety of mechanical properties that

are important in manufacturing, such as improve strength, hardness, formability and machinability. Thus microstructures transformation has influenced the properties of these materials.

2.0 Objective

Upon completion of this experiment, students should be able to;

1.  Understand the differences between ferrous and non-ferrous alloys from the metallurgical pointof view.

2.  Understand the phase diagram of iron-carbon and non ferrous alloys systems that enables for heattreating and procedures in heat treatment involved

3.  Describe the principal engineering properties and industrial application of ferrous and non-

ferrous alloys.

3.0 Apparatus

Optical Microscope.

8/15/2019 Lab Sheet 2 - Microstructure Study of Ferrous and Non Ferrous - Student

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Applied Mechanics Lab  – MEC 424/AHA/MCM Rev. 01-2014

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4.0 Experimental Procedure

Students will be provided with 8 specimens, which have been heat treated under the followingconditions. Students are required to observe the microstructure under the optical microscope and record

the data obtain.

Ferrous Alloy 

SPECIMEN 1 (X17) - 0.8% carbon steel, rolled bar, heated for 1 hour at 800°C, furnace cooled(annealed) to room temperature

SPECIMEN 2 (X18) - 0.8% carbon steel, rolled bar, heated for 1 hour at 800°C cooled in still

air (normalized)

SPECIMEN 3 (X19) - 0.35% carbon steel bar, furnace cooled from 870°C

SPECIMEN 4 (X20) - 1.3% carbon steel bar, furnace cooled from 970°C

Non-Ferrous Alloys

SPECIMEN 5 (X12) - Cu 58% / Zn 42%, reheated to 800 degree C for 1 hour, furnace cooled

to 600 degree C and the water quenched.

SPECIMEN 6 (X13) - Cu 58% / Zn 42%, reheated to 800 degree C for 1 hour, furnace cooled

to room temperature.

SPECIMEN 7 (X14) - Aluminium / 4% copper alloy, sand cast, heated at 525 degree C for 16hours and then water quenched.

SPECIMEN 8 (X15) - Aluminium / 4% copper alloy, sand cast, heated at 525 degree C for 16hours and then water quenched, reheated at 260 degree C for 70 hours.

5.0 Results and Discussion

Discuss your findings. Wherever necessary please use diagrams, charts and table to emphasize on yourfindings.

6.0 Conclusion

Conclude your findings

7.0 References

List all references that you have made during the course of your findings.