Question

Explain how you would be able to ascertain if a metal has been cold worked? Preferably using techniques that don't take a lot of time and could be done in the field.

Please answer all the questions with clear words!!! Thanks

Answer 1

the casting of metal done at higher temperature, the work hardning also kmown as cold hardning.is the straintheningof metal by plastic deformation. This strengthening occurs because of dislocation movements and dislocation generation within the crystal structure of the material

The increase in strength due to strain hardening is comparable to that of heat treating. Therefore, it is sometimes more economical to cold work a less costly and weaker metal than to hot work a more expensive metal that can be heat treated, especially if precision or a fine surface finish is required as well. The cold working process also reduces waste as compared to machining, or even eliminates with near net shape methods.The material savings becomes even more significant at larger volumes, and even more so when using expensive materials, such as copper, nickel, gold, tantalum, and palladium.

The saving on raw material as a result of cold forming can be very significant, as is saving machining time. Production cycle times when cold working are very short. On multi-station machinery, production cycle times are even less. This can be very advantageous for large production runs.