Let's be honest, metallography is not exactly the biggest field out there. If you're struggling with your computer, you can ask the internet "why did this error message come up?" and get some troubleshooting advice, but if you try typing "Why do I have radial cracks?" into a search engine, you'll more likely end up with an article about tomatoes than you will an explanation of what could cause a radial crack in a prepared mount and how to prevent it.
That's where we come in.