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MEK452 Materials Sciences & Technology UITM Assignment Sample Malaysia

MEK452 Materials Sciences & Technology at UITM covers advanced concepts and topics in material science. It delves into fundamentals essential for understanding material properties and their suitable applications. Students gain scientific insight into material selection and manipulation for engineering technology. The course explores key material families—metals, ceramics, polymers, and composites—discussing their structures, properties, and applications.

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Assignment Task 1: Explain the basic concepts of structure, mechanical and physical properties of materials [PO1, PLO1,LO1] .

Materials Science is a field that explores the properties and characteristics of various materials, helping us understand how they can be used in different applications. Here, we’ll discuss the basic concepts of structure, mechanical properties, and physical properties of materials.

  1. Structure of Materials:
  • Atomic Structure: All materials are composed of atoms. The arrangement of these atoms and their bonding determine the material’s properties. For example, the diamond and graphite have the same carbon atoms but different structures, leading to distinct properties.
  • Crystal Structure: Materials can have crystalline or non-crystalline (amorphous) structures. Crystalline materials have a repeating, ordered atomic arrangement, while amorphous materials lack a specific order. The crystal structure greatly influences a material’s properties.
  1. Mechanical Properties:
  • Strength: Strength is the ability of a material to withstand an applied force without failing. It includes tensile strength, compressive strength, and shear strength.
  • Stiffness: Stiffness is the resistance to deformation under applied load. Young’s modulus measures stiffness.
  • Hardness: Hardness measures a material’s resistance to scratching or indentation. It’s essential in material selection for wear resistance.
  • Ductility and Brittleness: Ductility is the ability to deform without breaking, while brittleness is the tendency to fracture without significant deformation.
  • Elasticity and Plasticity: Elastic materials return to their original shape after deformation, while plastic materials retain the deformation.
  1. Physical Properties:
  • Density: Density is the mass of a material per unit volume. It helps in understanding a material’s weight and can be crucial in structural design.
  • Thermal Conductivity: This property measures a material’s ability to conduct heat. It is vital in applications like heat exchangers.
  • Electrical Conductivity: Materials can be conductors (metals), semiconductors (silicon), or insulators (plastics) based on their electrical conductivity.
  • Thermal Expansion: It indicates how a material expands or contracts with changes in temperature, which is essential in designing structures that can withstand temperature variations.
  • Optical Properties: Refractive index, transparency, and color are crucial in materials used for optics and display technologies.

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Assignment Task 2:Identify the relationships between properties, structure and characterizations of materials in performing the materials selection process [PO2, PLO2, LO3].

Materials selection is a critical process that involves considering the relationships between properties, structure, and characterizations to choose the most appropriate material for a specific application. Understanding these relationships is key to making informed choices. Here’s a closer look at these relationships:

Structure-Property Relationships:

The atomic and molecular structure of a material has a profound impact on its properties. For example:

  • Crystal Structure: Materials with different crystal structures exhibit different properties. For instance, diamond and graphite, both made of carbon atoms, have vastly different properties due to their distinct crystal structures.
  • Polymorphism: Some materials can exist in multiple crystal structures, a phenomenon known as polymorphism. The choice of crystal structure can influence properties like hardness, electrical conductivity, and thermal conductivity.

Characterization Techniques:

Material characterization techniques are essential for understanding a material’s structure and properties. Common techniques include:

  • X-ray Diffraction: Used to determine the crystal structure and crystallographic properties of a material.
  • Scanning Electron Microscopy (SEM): Provides high-resolution images of a material’s surface, revealing microstructure and defects.
  • Spectroscopy (e.g., FTIR, UV-Vis): Allows for the analysis of a material’s chemical composition, electronic structure, and optical properties.
  • Mechanical Testing (e.g., Tensile, Hardness): Provides data on mechanical properties like strength, hardness, and elasticity.
  • Thermal Analysis (e.g., DSC, TGA): Offers insights into a material’s response to temperature changes, including phase transitions and thermal stability.

Materials Selection Process:

When selecting a material for a specific application, engineers and scientists must consider the following factors related to properties and structure:

  • Material Properties: Define the required mechanical, thermal, electrical, and other properties based on the application’s demands.
  • Microstructure: Consider the material’s microstructure, including grain size, defects, and phase composition, which can impact performance.
  • Crystallography: Understand the crystallography of the material, as different crystal structures can lead to varying properties.
  • Chemical Composition: The chemical composition affects not only the material’s properties but also its corrosion resistance and compatibility with other substances.


Material selection often involves trade-offs between various properties. For example, materials with high strength might be less ductile, and highly conductive materials may lack the desired corrosion resistance. Engineers must carefully weigh these trade-offs to meet the application’s specific requirements.

Performance Testing:

Once a material is selected and used in an application, performance testing is essential. This involves evaluating the material’s properties under actual operating conditions and ensuring it meets expectations.

In summary, the relationships between properties, structure, and characterizations are central to the materials selection process. By understanding how the atomic and molecular structure of a material influences its properties, using characterization techniques to gather critical data, and considering these factors in the selection process, engineers and scientists can make informed decisions to choose the most suitable material for a given application.

Assignment Task 3: Construct experimental setup and interpret measurements and observations obtained from practical investigations relating to materials science and technology [PO4, PLO3, LO2].

In materials science and technology, conducting practical investigations and interpreting the measurements and observations is crucial to understand and characterize the behavior of materials. Here, we will outline the construction of an experimental setup and how to interpret the data obtained from such experiments.

Experimental Setup:

Objective: Begin by clearly defining the objective of your experiment. What specific property or behavior of the material are you investigating? This will guide the entire setup.

Materials and Equipment: List the materials and equipment required for the experiment. This might include the material sample, testing apparatus (e.g., tensile testing machine for mechanical properties, or a spectrophotometer for optical properties), and safety gear.

Sample Preparation: If necessary, prepare the material sample according to the experimental requirements. Ensure the sample is of appropriate size and shape.

Measurement Parameters: Identify the specific parameters you need to measure. For example, in a mechanical test, you might measure stress, strain, and load. In an optical experiment, you could measure light absorption or reflectance.

Data Acquisition: Set up the data acquisition system to record measurements. Depending on the experiment, this might involve sensors, data loggers, or software applications.

Testing Procedure: Follow a standardized testing procedure to ensure consistency and repeatability. For mechanical tests, this might involve applying controlled loads and measuring the corresponding displacements.

Data Collection: Collect data at regular intervals or as needed during the experiment. Ensure accurate and precise measurements.

Data Analysis: After completing the experiment, analyze the collected data. This may involve calculations, graphical representation, and statistical analysis.

Interpreting Measurements and Observations:

Comparison with Expectations:

  • Compare the results with what was expected based on theory or prior knowledge. Are the measurements consistent with predictions?

Graphical Analysis:

  • Create graphs or plots of the data. For instance, stress-strain curves for a tensile test can reveal material behavior under load. Observe key points such as yield strength or fracture points.

Quantitative Analysis:

  • Calculate relevant material properties or characteristics using the collected data. For instance, calculate Young’s modulus or ultimate tensile strength in a mechanical test.


  • Note any observations made during the experiment. These can be qualitative aspects, such as changes in color, texture, or structural alterations in the material.

Statistical Analysis:

  • Perform statistical analyses if applicable. This helps determine the reliability and significance of the results.

Based on the interpretation of the measurements and observations, draw conclusions regarding the material’s behavior or properties. Discuss the implications and relevance of the findings.


Provide recommendations for further experiments or improvements to the setup or testing procedure if necessary.

In materials science and technology, practical investigations and the interpretation of measurements are essential for advancing our understanding of materials and their applications. Accurate, well-designed experiments and thoughtful data analysis are key to success in this field.

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