Question:
Which of the following is not a mechanism by which solute atoms interact with dislocations?
Which of the following is not a mechanism by which solute atoms interact with dislocations?
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Solute strengthening is mainly due to elastic strain field interaction with dislocations.
Updated On: Jun 29, 2026
- Elastic interaction
- Magnetic interaction
- Stacking-fault interaction
- Electrical interaction
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The Correct Option is B
Solution and Explanation
Concept:
Solute atoms interact with dislocations through different physical fields present in the crystal lattice. These interactions influence strengthening mechanisms such as solid solution strengthening.
The common interactions are:
• Elastic interaction (due to size mismatch strain fields)
• Stacking fault interaction (especially in FCC metals)
• Electrical interaction (due to electron density and bonding effects) Magnetic interaction is generally not a governing mechanism in dislocation–solute interaction in classical materials science.
Step 1: Understand solute-dislocation interaction mechanisms.
Solute atoms distort lattice and create stress fields that interact with dislocations.
Step 2: Evaluate options.
• Elastic interaction → valid (size misfit)
• Stacking fault interaction → valid in FCC alloys
• Electrical interaction → valid in metallic bonding context
• Magnetic interaction → not a primary mechanism Final Answer: \[ \boxed{\text{Magnetic interaction}} \]
• Elastic interaction (due to size mismatch strain fields)
• Stacking fault interaction (especially in FCC metals)
• Electrical interaction (due to electron density and bonding effects) Magnetic interaction is generally not a governing mechanism in dislocation–solute interaction in classical materials science.
Step 1: Understand solute-dislocation interaction mechanisms.
Solute atoms distort lattice and create stress fields that interact with dislocations.
Step 2: Evaluate options.
• Elastic interaction → valid (size misfit)
• Stacking fault interaction → valid in FCC alloys
• Electrical interaction → valid in metallic bonding context
• Magnetic interaction → not a primary mechanism Final Answer: \[ \boxed{\text{Magnetic interaction}} \]
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