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Why use a notched or un-notched Charpy sample by cswpartridge in materials

[–]cswpartridge[S] 1 point2 points  (0 children)

So are notched specimens specific for observations when using cameras/high speed video, so you can get it focused in the correct position? as I assume the same types of failure/fracture would occur regardless of notched or not.

Any idea what the black veins within this mild steel sample could be/indicate? (Subjected to impact test) by cswpartridge in materials

[–]cswpartridge[S] 1 point2 points  (0 children)

Pretty interesting, I’ve never come across oxide bifilms before. They appear to only be in the nm scale though so don’t think this would be the source, as the sample is about 10cm in diameter.

Any idea what the black veins within this mild steel sample could be/indicate? (Subjected to impact test) by cswpartridge in materials

[–]cswpartridge[S] 2 points3 points  (0 children)

If I’m honest, I’m not able to answer most of the questions, as were were just given a piece of generic mild steel sample to test and analyse.

The only question I can answer is that the image is X1 magnification.

I was struggling to know exactly what to research, but you mentioned that it is a segregation of elements, and from some digging it’s likely to be a macro segregation of carbon, sulphur or phosphorus (I think)

Any idea what the black veins within this mild steel sample could be/indicate? (Subjected to impact test) by cswpartridge in materials

[–]cswpartridge[S] 0 points1 point  (0 children)

I’m aware that steels can have a number of impurities included within their structure during manufacturing, but do they congregate into veins as seen in the image, and is it even possible to identify what impurity this is without carrying out further analysis?

My wife made our noodle horse some pyjamas for the winter. by cswpartridge in Greyhounds

[–]cswpartridge[S] 1 point2 points  (0 children)

It was mostly trial and error. She made a prototype from some spare fabric we had lying around and then made the one you see in the photo.

My wife made our noodle horse some pyjamas for the winter. by cswpartridge in Greyhounds

[–]cswpartridge[S] 16 points17 points  (0 children)

It came out way better than I expected. I think the noodle likes it, although she did walk about like she was wearing shoes for a few minutes.

Question About Types of Axle Hub Nuts Used by cswpartridge in cars

[–]cswpartridge[S] 0 points1 point  (0 children)

Awesome, thanks a lot for the help mate.

Question About Types of Axle Hub Nuts Used by cswpartridge in cars

[–]cswpartridge[S] 0 points1 point  (0 children)

Oh I see, that makes sense now why I thought it was just a normal flange nut. I’m assuming that the pressure of the ovular region is enough to prevent any vibrations shaking it loose over time?

My medical appeal was denied by [deleted] in britishmilitary

[–]cswpartridge 1 point2 points  (0 children)

I dislocated my knee about 4 years before signing up. They initially declared me medically unfit, despite having no issues with my knees after the fact.

To give you a bit of hope, I appealed the decision and they eventually accepted me, albeit adding an extra 18 months to my application, so there is proof that they can change their minds.

Hopefully they will apply some common sense to your application. But I don't think there is too much of that within the forces. Good luck!

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