81. Secondary electrons in scanning electron microscope is collected by
82. Image formation in electron microscope is based on
83. Match the following features in tensile stress-strain curves.
A. Yield drop
1. Strain ageing
B. Serrations
2. Superplasticity
C. Increase in flow stress with plastic deformation
3. Dislocation pinning
D. 1000% uniform strain
4. Dislocation multiplication
A. Yield drop | 1. Strain ageing |
B. Serrations | 2. Superplasticity |
C. Increase in flow stress with plastic deformation | 3. Dislocation pinning |
D. 1000% uniform strain | 4. Dislocation multiplication |