Question

Which of the following mechanical properties of a material is most structure insensitive?

• A. Toughness
• B. Tensile strength
• C. Young’s modulus
• D. Percentage reduction of area

Hint:

Young's modulus depends on atomic bonding and crystal structure, not on grain size or phase distribution—making it structure-insensitive.

Answer 1

The Correct Option is C

Step 1: Understanding structure sensitivity Mechanical properties can be classified based on their sensitivity to a material’s microstructure. Properties like toughness, tensile strength, and ductility are influenced by grain size, dislocation density, and phase distribution. Step 2: Role of Young’s modulus Young’s modulus (elastic modulus) represents the stiffness of a material in the elastic region. It is primarily determined by atomic bonding forces and is almost entirely independent of microstructural features. Conclusion: Among the given options, Young's modulus is least affected by changes in microstructure and is therefore the most structure-insensitive property.