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ENCN221-25S1 - Engineering Materials
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The following ChatGPT response - with numbered lines - answers the question: "What controls the strength of metals?" One of the lines contains an error in reasoning. Review the answer below and select the line with the incorrect reasoning.ChatGPT Response:1. The strength of metals is primarily governed by the movement of dislocations.2. Grain boundaries can act as barriers to dislocation motion, thereby enhancing strength.3. An increase in the metal's atomic mass results in higher strength by impeding dislocation movement.4. Work hardening increases strength in that dislocations are accumulating with plastic deformation.5. Additionally, mechanisms such as solid solution strengthening and precipitation hardening distort the lattice and can contribute to the overall yield strength.Which line in the above response contains the incorrect reasoning?
Failures that are the result of cyclic loading are classified as
The strength of a rigid polymer is most likely
A typical value of the fracture toughness of a rigid polymer is
What range of length scales best describes that over which the mechanisms governing mechanical behaviour of materials act: