14.7: Questions
- Page ID
- 31576
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You should be able to answer these questions without too much difficulty after studying this TLP. If not, then you should go through it again!
What is crystallographic texture?
- Answer
-
A. The distribution of orientations of crystallites within a polycrystalline sample. A random texture describes a sample in which the crystallographic axes of the crystallites are oriented randomly, whereas a non-random distribution means that the material has crystallographic texture.
Which of these are limitations of pole figures? (Select all that apply)
| a | Specific hkl planes cannot be plotted |
| b | Poles in the final plot for a polycrystalline material are not identified with particular crystals |
| c | Information about the crystallite location in a sample is absent |
| d | The orientation of a crystal must be described relative to another |
- Answer
-
B and C
Deeper questions
The following questions require some thought and reaching the answer may require you to think beyond the contents of this TLP.
A sample of rolled a-brass (ccp) has a very strong (110) [1
2] texture. Using a Wulff net, sketch stereograms showing the distribution of 111 and 200 poles with respect to the normal to the sheet and the rolling direction.
- Hint:
-
When plotting the stereogram, begin by plotting the rolling direction (RD) [1
2] on the primitive of the stereogram and the normal direction (ND) [110] at the centre.
Remember that rolled sheets always have mmm symmetry
- Answer
-
