Plankton are the tiny, single-celled organisms that reside in oceans, lakes, and rivers. They vary in size from one millimeter to a few centimeters
In learning about the properties of metals, you will learn about why metals crack under different conditions. We will start with an iron nail and a piece of iron metal. The metal is heated to its melting point, then cooled rapidly back down to room temperature. As it cools, it contracts somewhat and forms tiny cracks that spread across its surface. These cracks are called microcracks
The more intense the heat source and rapid the cooling rate, the more microcracks there will be on the metal's surface.
what makes metal brittle in forging
