High-speed eccentric presses were once employed to prepare specimens. The cold hardening effect of eccentric presses runs deeply into the material, up to around 35% of the specimen’s thickness, causing unacceptable levels of damage to specimen edges. The result is excessive compression and deformation of the material, which necessitates cold working to strengthen it.

A metal is strengthened using a technique called cold working, sometimes called plastic deformation, in which its shape is altered without heat. Mechanical stress is applied to the metal, permanently altering its crystalline structure.

Cold working is done at relatively low temperatures, as the name suggests. It is done specifically below the metal’s recrystallization point for the specific metal. The most typical materials to be cold-worked are pliable metals like copper and aluminum.

The position accuracy of NextGen’s TensileTurn CNC – Round Tensile Sample Preparation Machine is X:±0.05mm,Z:±0.03mm.

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